[Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Dou Liyang]

These patches aim to refactor the qmp_query_blockstats() and
improve the performance by reducing the running time of it.

qmp_query_blockstats() is used to monitor the blockstats, it
querys all the graph_bdrv_states or monitor_block_backends.

There are the two jobs:

1 For the performance:

1.1 the time it takes(ns) in each time:
the disk numbers     | 10    | 500
-------------------------------------
before these patches | 19429 | 667722 
after these patches  | 17516 | 557044

1.2 the I/O performance is degraded(%) during the monitor:

the disk numbers     | 10    | 500
-------------------------------------
before these patches | 1.3   | 14.2
after these patches  | 0.8   | 9.1

used the dd command likes this to test: 
dd if=date_1.dat of=date_2.dat conv=fsync oflag=direct bs=1k count=100k.

2 refactor qmp_query_blockstats():

From:

+--------------+      +---------------------+
 | 1            |      | 4.                  |
 |next_query_bds|      |bdrv_query_bds_stats +---+
 |              |      |                     |   |
 +--------^-----+      +-------------^-------+   |
          |                          |           |
+---------+----------+      +--------+-------+   |
| 0.                 |      | 2.             |   |
|qmp_query_blockstats+------>bdrv_query_stats<----
|                    |      |                |
+--------------------+      +--------+-------+
                                     |
                       +-------------v-------+
                       | 3.                  |
                       |bdrv_query_blk_stats |
                       |                     |
                       +---------------------+

To:

                                    +--------------+
                                    |              |
                           +--------v-----------+  |
                       +--->  3.                |  |
+-------------------+  |   |bdrv_query_bds_stats+--+
| 1.                +--+   |                    |
|                   +      +--------------------+
|qmp_query_blockstats--+
|                   |  |
+-------------------+  |   +--------------------+
                       |   | 2.                 |
                       +--->                    |
                           |bdrv_query_blk_stats|
                           |                    |
                           +--------------------+


Dou Liyang (4):
  block: refactor the bdrv_next_node and add some comments
  block/qapi: reduce the coupling between the bdrv_query_stats and
    bdrv_query_bds_stats
  block/qapi: acquire a reference instead of a lock during querying
    blockstats
  block/qapi: optimize the query function of the blockstats

 block.c      | 16 ++++++++---
 block/qapi.c | 92 +++++++++++++++++++++++++-----------------------------------
 2 files changed, 50 insertions(+), 58 deletions(-)

-- 
2.5.5

[Qemu-devel] [PATCH RFC v2 1/4] block: refactor bdrv_next_node for readability

[Dou Liyang]

make the bdrv_next_node() clearly and add some comments.

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
---
 block.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/block.c b/block.c
index 39ddea3..01c9e51 100644
--- a/block.c
+++ b/block.c
@@ -2931,12 +2931,20 @@ bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base)
     return top != NULL;
 }
 
+/*
+ * Return the BlockDriverStates of all the named nodes.
+ * If @bs is null, return the first one.
+ * Else, return @bs's next sibling, which may be null.
+ *
+ * To iterate over all BlockDriverStates, do
+ * for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(blk)) {
+ *     ...
+ * }
+ */
 BlockDriverState *bdrv_next_node(BlockDriverState *bs)
 {
-    if (!bs) {
-        return QTAILQ_FIRST(&graph_bdrv_states);
-    }
-    return QTAILQ_NEXT(bs, node_list);
+    return bs ? QTAILQ_NEXT(bs, node_list)
+            : QTAILQ_FIRST(&graph_bdrv_states);
 }
 
 const char *bdrv_get_node_name(const BlockDriverState *bs)
-- 
2.5.5

[Qemu-devel] [PATCH RFC v2 2/4] block/qapi: reduce the coupling between the bdrv_query_stats and bdrv_query_bds_stats

[Dou Liyang]

the bdrv_query_stats and bdrv_query_bds_stats functions need to call
each other, that increases the coupling. it also makes the program
complicated and makes some unnecessary judgements.

remove the call from bdrv_query_bds_stats to bdrv_query_stats, just
take some recursion to make it clearly.

avoid judging whether the blk is NULL during querying the bds stats.
it is unnecessary.

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
---
 block/qapi.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/block/qapi.c b/block/qapi.c
index a62e862..bc622cd 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -357,10 +357,6 @@ static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
     qapi_free_BlockInfo(info);
 }
 
-static BlockStats *bdrv_query_stats(BlockBackend *blk,
-                                    const BlockDriverState *bs,
-                                    bool query_backing);
-
 static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
 {
     BlockAcctStats *stats = blk_get_stats(blk);
@@ -428,9 +424,18 @@ static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
     }
 }
 
-static void bdrv_query_bds_stats(BlockStats *s, const BlockDriverState *bs,
+static BlockStats *bdrv_query_bds_stats(const BlockDriverState *bs,
                                  bool query_backing)
 {
+    BlockStats *s = NULL;
+
+    s = g_malloc0(sizeof(*s));
+    s->stats = g_malloc0(sizeof(*s->stats));
+
+    if (!bs) {
+        return s;
+    }
+
     if (bdrv_get_node_name(bs)[0]) {
         s->has_node_name = true;
         s->node_name = g_strdup(bdrv_get_node_name(bs));
@@ -440,14 +445,15 @@ static void bdrv_query_bds_stats(BlockStats *s, const BlockDriverState *bs,
 
     if (bs->file) {
         s->has_parent = true;
-        s->parent = bdrv_query_stats(NULL, bs->file->bs, query_backing);
+        s->parent = bdrv_query_bds_stats(bs->file->bs, query_backing);
     }
 
     if (query_backing && bs->backing) {
         s->has_backing = true;
-        s->backing = bdrv_query_stats(NULL, bs->backing->bs, query_backing);
+        s->backing = bdrv_query_bds_stats(bs->backing->bs, query_backing);
     }
 
+    return s;
 }
 
 static BlockStats *bdrv_query_stats(BlockBackend *blk,
@@ -456,17 +462,13 @@ static BlockStats *bdrv_query_stats(BlockBackend *blk,
 {
     BlockStats *s;
 
-    s = g_malloc0(sizeof(*s));
-    s->stats = g_malloc0(sizeof(*s->stats));
+    s = bdrv_query_bds_stats(bs, query_backing);
 
     if (blk) {
         s->has_device = true;
         s->device = g_strdup(blk_name(blk));
         bdrv_query_blk_stats(s->stats, blk);
     }
-    if (bs) {
-        bdrv_query_bds_stats(s, bs, query_backing);
-    }
 
     return s;
 }
-- 
2.5.5

[Qemu-devel] [PATCH RFC v2 3/4] block/qapi: acquire a reference instead of a lock during querying blockstats

[Dou Liyang]

This patch works to improve the performance of the query requests.

>From the commit 13344f3a, it adds a lock to make query-blockstats
safe by the aio_context_acquire(). the qmp_query_blockstats func
requires/releases the AioContext lock, which takes some time and
blocks the I/O processing. It affects the performance, especially
in the multi-disks guests.

As the low-level details of block statistics inside QEMU, we can
acquire a reference instead of the lock.

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
---
 block/qapi.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/block/qapi.c b/block/qapi.c
index bc622cd..2262918 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -457,17 +457,21 @@ static BlockStats *bdrv_query_bds_stats(const BlockDriverState *bs,
 }
 
 static BlockStats *bdrv_query_stats(BlockBackend *blk,
-                                    const BlockDriverState *bs,
+                                    BlockDriverState *bs,
                                     bool query_backing)
 {
     BlockStats *s;
 
+    bdrv_ref(bs);
     s = bdrv_query_bds_stats(bs, query_backing);
+    bdrv_unref(bs);
 
     if (blk) {
+        blk_ref(blk);
         s->has_device = true;
         s->device = g_strdup(blk_name(blk));
         bdrv_query_blk_stats(s->stats, blk);
+        blk_unref(blk);
     }
 
     return s;
@@ -523,13 +527,8 @@ BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 
     while (next_query_bds(&blk, &bs, query_nodes)) {
         BlockStatsList *info = g_malloc0(sizeof(*info));
-        AioContext *ctx = blk ? blk_get_aio_context(blk)
-                              : bdrv_get_aio_context(bs);
 
-        aio_context_acquire(ctx);
         info->value = bdrv_query_stats(blk, bs, !query_nodes);
-        aio_context_release(ctx);
-
         *p_next = info;
         p_next = &info->next;
     }
-- 
2.5.5

[Qemu-devel] [PATCH RFC v2 4/4] block/qapi: optimize the query function of the blockstats

[Dou Liyang]

this patch works to optimize the qmp_query_blockstats() by removing
additional performance overhead from the next_query_bds and
bdrv_query_stats.

It removes that two functions, and also makes the structure of the
code clearly.

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
---
 block/qapi.c | 69 +++++++++++++++++++++++-------------------------------------
 1 file changed, 26 insertions(+), 43 deletions(-)

diff --git a/block/qapi.c b/block/qapi.c
index 2262918..d561945 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -456,27 +456,6 @@ static BlockStats *bdrv_query_bds_stats(const BlockDriverState *bs,
     return s;
 }
 
-static BlockStats *bdrv_query_stats(BlockBackend *blk,
-                                    BlockDriverState *bs,
-                                    bool query_backing)
-{
-    BlockStats *s;
-
-    bdrv_ref(bs);
-    s = bdrv_query_bds_stats(bs, query_backing);
-    bdrv_unref(bs);
-
-    if (blk) {
-        blk_ref(blk);
-        s->has_device = true;
-        s->device = g_strdup(blk_name(blk));
-        bdrv_query_blk_stats(s->stats, blk);
-        blk_unref(blk);
-    }
-
-    return s;
-}
-
 BlockInfoList *qmp_query_block(Error **errp)
 {
     BlockInfoList *head = NULL, **p_next = &head;
@@ -500,37 +479,41 @@ BlockInfoList *qmp_query_block(Error **errp)
     return head;
 }
 
-static bool next_query_bds(BlockBackend **blk, BlockDriverState **bs,
-                           bool query_nodes)
-{
-    if (query_nodes) {
-        *bs = bdrv_next_node(*bs);
-        return !!*bs;
-    }
-
-    *blk = blk_next(*blk);
-    *bs = *blk ? blk_bs(*blk) : NULL;
-
-    return !!*blk;
-}
-
 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
                                      bool query_nodes,
                                      Error **errp)
 {
     BlockStatsList *head = NULL, **p_next = &head;
-    BlockBackend *blk = NULL;
-    BlockDriverState *bs = NULL;
+    BlockBackend *blk;
+    BlockDriverState *bs;
 
     /* Just to be safe if query_nodes is not always initialized */
-    query_nodes = has_query_nodes && query_nodes;
+    if (has_query_nodes && query_nodes) {
+        for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
+            BlockStatsList *info = g_malloc0(sizeof(*info));
 
-    while (next_query_bds(&blk, &bs, query_nodes)) {
-        BlockStatsList *info = g_malloc0(sizeof(*info));
+            bdrv_ref(bs);
+            info->value = bdrv_query_bds_stats(bs, false);
+            bdrv_unref(bs);
 
-        info->value = bdrv_query_stats(blk, bs, !query_nodes);
-        *p_next = info;
-        p_next = &info->next;
+            *p_next = info;
+            p_next = &info->next;
+        }
+    } else {
+        for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
+            BlockStatsList *info = g_malloc0(sizeof(*info));
+
+            blk_ref(blk);
+            BlockStats *s = bdrv_query_bds_stats(blk_bs(blk), true);
+            s->has_device = true;
+            s->device = g_strdup(blk_name(blk));
+            bdrv_query_blk_stats(s->stats, blk);
+            blk_unref(blk);
+
+            info->value = s;
+            *p_next = info;
+            p_next = &info->next;
+        }
     }
 
     return head;
-- 
2.5.5

Re: [Qemu-devel] [PATCH RFC v2 1/4] block: refactor bdrv_next_node for readability

[Stefan Hajnoczi]

[-- Attachment #1: Type: text/plain, Size: 1452 bytes --]

On Mon, Dec 19, 2016 at 04:51:23PM +0800, Dou Liyang wrote:
> make the bdrv_next_node() clearly and add some comments.
> 
> Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
> ---
>  block.c | 16 ++++++++++++----
>  1 file changed, 12 insertions(+), 4 deletions(-)
> 
> diff --git a/block.c b/block.c
> index 39ddea3..01c9e51 100644
> --- a/block.c
> +++ b/block.c
> @@ -2931,12 +2931,20 @@ bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base)
>      return top != NULL;
>  }
>  
> +/*
> + * Return the BlockDriverStates of all the named nodes.

This sentence describes how this function is used in a loop.  The
semantics of one call to this function are different: only a *single*
named node's BlockDriverState is returned.

> + * If @bs is null, return the first one.
> + * Else, return @bs's next sibling, which may be null.
> + *
> + * To iterate over all BlockDriverStates, do
> + * for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(blk)) {
> + *     ...
> + * }
> + */
>  BlockDriverState *bdrv_next_node(BlockDriverState *bs)
>  {
> -    if (!bs) {
> -        return QTAILQ_FIRST(&graph_bdrv_states);
> -    }
> -    return QTAILQ_NEXT(bs, node_list);
> +    return bs ? QTAILQ_NEXT(bs, node_list)
> +            : QTAILQ_FIRST(&graph_bdrv_states);

The conditional operator (?:) is often considered harder to read than an
if statement.  I see no reason to modify the code.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 455 bytes --]

Re: [Qemu-devel] [PATCH RFC v2 3/4] block/qapi: acquire a reference instead of a lock during querying blockstats

[Stefan Hajnoczi]

[-- Attachment #1: Type: text/plain, Size: 2574 bytes --]

On Mon, Dec 19, 2016 at 04:51:25PM +0800, Dou Liyang wrote:
> This patch works to improve the performance of the query requests.
> 
> From the commit 13344f3a, it adds a lock to make query-blockstats
> safe by the aio_context_acquire(). the qmp_query_blockstats func
> requires/releases the AioContext lock, which takes some time and
> blocks the I/O processing. It affects the performance, especially
> in the multi-disks guests.
> 
> As the low-level details of block statistics inside QEMU, we can
> acquire a reference instead of the lock.
> 
> Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
> ---
>  block/qapi.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)

This patch changes the locking rules for blk_get_stats() (this covers a
lot of fields), bdrv_get_node_name(), and blk_name().

You must document the new locking rules for these fields in
block-backend.h, block_int.h, etc.

> diff --git a/block/qapi.c b/block/qapi.c
> index bc622cd..2262918 100644
> --- a/block/qapi.c
> +++ b/block/qapi.c
> @@ -457,17 +457,21 @@ static BlockStats *bdrv_query_bds_stats(const BlockDriverState *bs,
>  }
>  
>  static BlockStats *bdrv_query_stats(BlockBackend *blk,
> -                                    const BlockDriverState *bs,
> +                                    BlockDriverState *bs,
>                                      bool query_backing)
>  {
>      BlockStats *s;
>  
> +    bdrv_ref(bs);
>      s = bdrv_query_bds_stats(bs, query_backing);
> +    bdrv_unref(bs);
>  
>      if (blk) {
> +        blk_ref(blk);
>          s->has_device = true;
>          s->device = g_strdup(blk_name(blk));
>          bdrv_query_blk_stats(s->stats, blk);
> +        blk_unref(blk);

This does not look correct.  The caller passed in bs and blk so they
must already have a reference.  If not, then what protects bs and blk
from deletion before/after this function is called?

>      }
>  
>      return s;
> @@ -523,13 +527,8 @@ BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
>  
>      while (next_query_bds(&blk, &bs, query_nodes)) {
>          BlockStatsList *info = g_malloc0(sizeof(*info));
> -        AioContext *ctx = blk ? blk_get_aio_context(blk)
> -                              : bdrv_get_aio_context(bs);
>  
> -        aio_context_acquire(ctx);
>          info->value = bdrv_query_stats(blk, bs, !query_nodes);
> -        aio_context_release(ctx);
> -
>          *p_next = info;
>          p_next = &info->next;
>      }
> -- 
> 2.5.5
> 
> 
> 
> 

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 455 bytes --]

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Stefan Hajnoczi]

[-- Attachment #1: Type: text/plain, Size: 988 bytes --]

On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
> These patches aim to refactor the qmp_query_blockstats() and
> improve the performance by reducing the running time of it.
> 
> qmp_query_blockstats() is used to monitor the blockstats, it
> querys all the graph_bdrv_states or monitor_block_backends.
> 
> There are the two jobs:
> 
> 1 For the performance:
> 
> 1.1 the time it takes(ns) in each time:
> the disk numbers     | 10    | 500
> -------------------------------------
> before these patches | 19429 | 667722 
> after these patches  | 17516 | 557044
> 
> 1.2 the I/O performance is degraded(%) during the monitor:
> 
> the disk numbers     | 10    | 500
> -------------------------------------
> before these patches | 1.3   | 14.2
> after these patches  | 0.8   | 9.1

Do you know what is consuming the remaining 9.1%?

I'm surprised to see such a high performance impact caused by a QMP
command.

Please post your QEMU command-line.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 455 bytes --]

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Fam Zheng]

On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
> On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
> > These patches aim to refactor the qmp_query_blockstats() and
> > improve the performance by reducing the running time of it.
> > 
> > qmp_query_blockstats() is used to monitor the blockstats, it
> > querys all the graph_bdrv_states or monitor_block_backends.
> > 
> > There are the two jobs:
> > 
> > 1 For the performance:
> > 
> > 1.1 the time it takes(ns) in each time:
> > the disk numbers     | 10    | 500
> > -------------------------------------
> > before these patches | 19429 | 667722 
> > after these patches  | 17516 | 557044
> > 
> > 1.2 the I/O performance is degraded(%) during the monitor:
> > 
> > the disk numbers     | 10    | 500
> > -------------------------------------
> > before these patches | 1.3   | 14.2
> > after these patches  | 0.8   | 9.1
> 
> Do you know what is consuming the remaining 9.1%?
> 
> I'm surprised to see such a high performance impact caused by a QMP
> command.

If it's "performance is 9.1% worse only during the 557044 ns when the QMP
command is being processed", it's probably becaues the main loop is stalled a
bit, and it's not a big problem. I'd be very surprised if the degradation is
more longer than that.

Fam

> 
> Please post your QEMU command-line.

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Stefan Hajnoczi]

[-- Attachment #1: Type: text/plain, Size: 1799 bytes --]

On Tue, Dec 20, 2016 at 12:32:40AM +0800, Fam Zheng wrote:
> On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
> > On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
> > > These patches aim to refactor the qmp_query_blockstats() and
> > > improve the performance by reducing the running time of it.
> > > 
> > > qmp_query_blockstats() is used to monitor the blockstats, it
> > > querys all the graph_bdrv_states or monitor_block_backends.
> > > 
> > > There are the two jobs:
> > > 
> > > 1 For the performance:
> > > 
> > > 1.1 the time it takes(ns) in each time:
> > > the disk numbers     | 10    | 500
> > > -------------------------------------
> > > before these patches | 19429 | 667722 
> > > after these patches  | 17516 | 557044
> > > 
> > > 1.2 the I/O performance is degraded(%) during the monitor:
> > > 
> > > the disk numbers     | 10    | 500
> > > -------------------------------------
> > > before these patches | 1.3   | 14.2
> > > after these patches  | 0.8   | 9.1
> > 
> > Do you know what is consuming the remaining 9.1%?
> > 
> > I'm surprised to see such a high performance impact caused by a QMP
> > command.
> 
> If it's "performance is 9.1% worse only during the 557044 ns when the QMP
> command is being processed", it's probably becaues the main loop is stalled a
> bit, and it's not a big problem. I'd be very surprised if the degradation is
> more longer than that.

It would be interesting to compare against virtio-blk dataplane.  That
way the QMP command can execute without interfering with disk I/O activity.

qemu-system-x86_64 ... \
    -object iothread,id=iothread0 \
    -drive if=none,id=drive0,file=vm.img,format=raw,aio=native,cache=none \
    -device virtio-blk-pci,drive=drive0,iothread=iothread0

Stefan

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 455 bytes --]

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Dou Liyang]

Hi, Stefan, Fam,

At 12/20/2016 12:32 AM, Fam Zheng wrote:
> On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
>> On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
>>> These patches aim to refactor the qmp_query_blockstats() and
>>> improve the performance by reducing the running time of it.
>>>
>>> qmp_query_blockstats() is used to monitor the blockstats, it
>>> querys all the graph_bdrv_states or monitor_block_backends.
>>>
>>> There are the two jobs:
>>>
>>> 1 For the performance:
>>>
>>> 1.1 the time it takes(ns) in each time:
>>> the disk numbers     | 10    | 500
>>> -------------------------------------
>>> before these patches | 19429 | 667722
>>> after these patches  | 17516 | 557044
>>>
>>> 1.2 the I/O performance is degraded(%) during the monitor:
>>>
>>> the disk numbers     | 10    | 500
>>> -------------------------------------
>>> before these patches | 1.3   | 14.2
>>> after these patches  | 0.8   | 9.1
>>
>> Do you know what is consuming the remaining 9.1%?
>>

Yes, I guess it's probably because the thread that is assigned to
handles the I/O may compete with the main loop threads for the
system resource in host. They may run in the same cpu in host frequently 
as the limit of resource.

eg: my host have 4 cpus, the guest have 2 vcpus,

before the I/O:
[root@localhost qemu]# ps -eLo ruser,pid,ppid,lwp,psr | grep qemu | grep 
-v grep
qemu     16664     1 16664   1   /* main loop thread in cpu_id: 1*/
qemu     16664     1 16687   3
qemu     16664     1 16690   2  /* vcpu  thread in cpu_id: 2 */
qemu     16664     1 16691   2  /* vcpu  thread in cpu_id: 2 */
qemu     16664     1 16693   3

during the I/O:
[root@localhost qemu]# ps -eLo ruser,pid,ppid,lwp,psr | grep qemu | grep 
-v grep
qemu     16664     1 16664   1   /* main loop thread */
qemu     16664     1 16687   3
qemu     16664     1 16690   2
qemu     16664     1 16691   2
qemu     16664     1 16693   3
qemu     16664     1 19623   1   /* new thread for I/O*/

The reason:

In VirtIO:

the I/O and the command requests both need to be dispatched
by AIO in main loop, As Fam said, the main loop is stalled a
bit.

But In IDE :

the I/O requests is handled by the vcpu threads. it isn't
be disturbed. but its performance also degraded

And below is the script to query blockstats, With the increase of
sleep time (0.5, 1, 2, 4, 6) for decreasing the frequency of query.
At 6s, the performance degradation will disappear.

```
#!/bin/bash

domblkstat(){
	int=1
	while(( $int<=1000 ))
	do
		virsh  domblkstat rhel500
         	let "int++"
		sleep 0.5 # 1,2,4,8 will be set
	done	
}

echo "-----begin-----"
domblkstat
echo "-----end-----"

```

If we want to avoid the performance degradation in this situation, we 
may have to sacrifice the completeness.  it may like this:

  BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
                                       bool query_nodes,
+                                     BlockBackend *query_blk,
                                       Error **errp)
  {
      BlockStatsList *head = NULL, **p_next = &head;

that is what I prepare to do in the next version if this is accepted. :)

>> I'm surprised to see such a high performance impact caused by a QMP
>> command.
>

This may be because the command is always executed with only a few
seconds apart, not just once.


> If it's "performance is 9.1% worse only during the 557044 ns when the QMP
> command is being processed", it's probably becaues the main loop is stalled a
> bit, and it's not a big problem. I'd be very surprised if the degradation is
> more longer than that.
>

Yes it is.

> Fam
>
>>
>> Please post your QEMU command-line.
>
the command-line is long, I use this script to generate, for each 
controller have 6 disks:

```
...
# body
while(($int<=500))
do

ctler=$[int/6+1]
mod=$[int%6]
bus=$[int/100]
ctlslot=$[(int-100*bus)/6+1]

if [ $mod == 0 ]
then
echo "
   <controller type='sata' index='${ctler}'>
      <address type='pci' domain='0x0000' bus='0x0$[bus+2]' 
slot='${ctlslot}' />
   </controller>";

fi


echo "  <disk type='file' device='disk'>
   <driver name='qemu' type='raw' cache='none'/>
     <source file='/home/image/rhel7.0-${int}.qcow2'/>
     <target dev='sd${int}' bus='sata'/>
     <address type='drive' controller='${ctler}' target='0' unit='${mod}'/>
   </disk>"

let "int++"

done
....
```

/usr/local/bin/qemu-system-x86_64 -name rhel500 -S -machine 
pc-i440fx-2.8,accel=kvm,usb=off -cpu Nehalem -m 2048 -realtime mlock=off 
-smp 4,sockets=4,cores=1,threads=1 -uuid 
c6feddc5-3458-444e-9374-5a0d82f4c949 -no-user-config -nodefaults 
-chardev 
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-rhel500/monitor.sock,server,nowait 
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime 
-no-shutdown -boot strict=on -device 
pci-bridge,chassis_nr=1,id=pci.1,bus=pci.0,addr=0x2 -device 
pci-bridge,chassis_nr=2,id=pci.2,bus=pci.0,addr=0x3 -device 
pci-bridge,chassis_nr=3,id=pci.3,bus=pci.0,addr=0x4 -device 
pci-bridge,chassis_nr=4,id=pci.4,bus=pci.0,addr=0x5 -device 
pci-bridge,chassis_nr=5,id=pci.5,bus=pci.0,addr=0x6 -device 
pci-bridge,chassis_nr=6,id=pci.6,bus=pci.0,addr=0x8 -device 
piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device 
ahci,id=sata0,bus=pci.0,addr=0x9 -device 
ahci,id=sata1,bus=pci.2,addr=0x1 -device 
ahci,id=sata2,bus=pci.2,addr=0x2 -device 
ahci,id=sata3,bus=pci.2,addr=0x3 -device 
ahci,id=sata4,bus=pci.2,addr=0x4 -device 
ahci,id=sata5,bus=pci.2,addr=0x5 -device 
ahci,id=sata6,bus=pci.2,addr=0x6 -device 
ahci,id=sata7,bus=pci.2,addr=0x7 -device 
ahci,id=sata8,bus=pci.2,addr=0x8 -device 
ahci,id=sata9,bus=pci.2,addr=0x9 -device 
ahci,id=sata10,bus=pci.2,addr=0xa -device 
ahci,id=sata11,bus=pci.2,addr=0xb -device 
ahci,id=sata12,bus=pci.2,addr=0xc -device 
ahci,id=sata13,bus=pci.2,addr=0xd -device 
ahci,id=sata14,bus=pci.2,addr=0xe -device 
ahci,id=sata15,bus=pci.2,addr=0xf -device 
ahci,id=sata16,bus=pci.2,addr=0x10 -device 
ahci,id=sata17,bus=pci.2,addr=0x11 -device 
ahci,id=sata18,bus=pci.3,addr=0x1 -device 
ahci,id=sata19,bus=pci.3,addr=0x2 -device 
ahci,id=sata20,bus=pci.3,addr=0x3 -device 
ahci,id=sata21,bus=pci.3,addr=0x4 -device 
ahci,id=sata22,bus=pci.3,addr=0x5 -device 
ahci,id=sata23,bus=pci.3,addr=0x6 -device 
ahci,id=sata24,bus=pci.3,addr=0x7 -device 
ahci,id=sata25,bus=pci.3,addr=0x8 -device 
ahci,id=sata26,bus=pci.3,addr=0x9 -device 
ahci,id=sata27,bus=pci.3,addr=0xa -device 
ahci,id=sata28,bus=pci.3,addr=0xb -device 
ahci,id=sata29,bus=pci.3,addr=0xc -device 
ahci,id=sata30,bus=pci.3,addr=0xd -device 
ahci,id=sata31,bus=pci.3,addr=0xe -device 
ahci,id=sata32,bus=pci.3,addr=0xf -device 
ahci,id=sata33,bus=pci.3,addr=0x10 -device 
ahci,id=sata34,bus=pci.3,addr=0x11 -device 
ahci,id=sata35,bus=pci.4,addr=0x1 -device 
ahci,id=sata36,bus=pci.4,addr=0x2 -device 
ahci,id=sata37,bus=pci.4,addr=0x3 -device 
ahci,id=sata38,bus=pci.4,addr=0x4 -device 
ahci,id=sata39,bus=pci.4,addr=0x5 -device 
ahci,id=sata40,bus=pci.4,addr=0x6 -device 
ahci,id=sata41,bus=pci.4,addr=0x7 -device 
ahci,id=sata42,bus=pci.4,addr=0x8 -device 
ahci,id=sata43,bus=pci.4,addr=0x9 -device 
ahci,id=sata44,bus=pci.4,addr=0xa -device 
ahci,id=sata45,bus=pci.4,addr=0xb -device 
ahci,id=sata46,bus=pci.4,addr=0xc -device 
ahci,id=sata47,bus=pci.4,addr=0xd -device 
ahci,id=sata48,bus=pci.4,addr=0xe -device 
ahci,id=sata49,bus=pci.4,addr=0xf -device 
ahci,id=sata50,bus=pci.4,addr=0x10 -device 
ahci,id=sata51,bus=pci.5,addr=0x1 -device 
ahci,id=sata52,bus=pci.5,addr=0x2 -device 
ahci,id=sata53,bus=pci.5,addr=0x3 -device 
ahci,id=sata54,bus=pci.5,addr=0x4 -device 
ahci,id=sata55,bus=pci.5,addr=0x5 -device 
ahci,id=sata56,bus=pci.5,addr=0x6 -device 
ahci,id=sata57,bus=pci.5,addr=0x7 -device 
ahci,id=sata58,bus=pci.5,addr=0x8 -device 
ahci,id=sata59,bus=pci.5,addr=0x9 -device 
ahci,id=sata60,bus=pci.5,addr=0xa -device 
ahci,id=sata61,bus=pci.5,addr=0xb -device 
ahci,id=sata62,bus=pci.5,addr=0xc -device 
ahci,id=sata63,bus=pci.5,addr=0xd -device 
ahci,id=sata64,bus=pci.5,addr=0xe -device 
ahci,id=sata65,bus=pci.5,addr=0xf -device 
ahci,id=sata66,bus=pci.5,addr=0x10 -device 
ahci,id=sata67,bus=pci.5,addr=0x11 -device 
ahci,id=sata68,bus=pci.6,addr=0x1 -device 
ahci,id=sata69,bus=pci.6,addr=0x2 -device 
ahci,id=sata70,bus=pci.6,addr=0x3 -device 
ahci,id=sata71,bus=pci.6,addr=0x4 -device 
ahci,id=sata72,bus=pci.6,addr=0x5 -device 
ahci,id=sata73,bus=pci.6,addr=0x6 -device 
ahci,id=sata74,bus=pci.6,addr=0x7 -device 
ahci,id=sata75,bus=pci.6,addr=0x8 -device 
ahci,id=sata76,bus=pci.6,addr=0x9 -device 
ahci,id=sata77,bus=pci.6,addr=0xa -device 
ahci,id=sata78,bus=pci.6,addr=0xb -device 
ahci,id=sata79,bus=pci.6,addr=0xc -device 
ahci,id=sata80,bus=pci.6,addr=0xd -device 
ahci,id=sata81,bus=pci.6,addr=0xe -device 
ahci,id=sata82,bus=pci.6,addr=0xf -device 
ahci,id=sata83,bus=pci.6,addr=0x10 -device 
ahci,id=sata84,bus=pci.6,addr=0x11 -drive 
file=/var/lib/libvirt/images/rhel7.0.qcow2,if=none,id=drive-ide0-0-1,format=qcow2 
-device 
ide-hd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1,bootindex=1 
-drive 
file=/home/image/rhel7.0-1.qcow2,if=none,id=drive-sata1-0-1,format=raw,cache=none 
-device ide-hd,bus=sata1.1,drive=drive-sata1-0-1,id=sata1-0-1 -drive 
file=/home/image/rhel7.0-2.qcow2,if=none,id=drive-sata1-0-2,format=raw,cache=none 
-device ide-hd,bus=sata1.2,drive=drive-sata1-0-2,id=sata1-0-2 -drive 
file=/home/image/rhel7.0-3.qcow2,if=none,id=drive-sata1-0-3,format=raw,cache=none 
-device ide-hd,bus=sata1.3,drive=drive-sata1-0-3,id=sata1-0-3 -drive 
file=/home/image/rhel7.0-4.qcow2,if=none,id=drive-sata1-0-4,format=raw,cache=none 
-device ide-hd,bus=sata1.4,drive=drive-sata1-0-4,id=sata1-0-4 -drive 
file=/home/image/rhel7.0-5.qcow2,if=none,id=drive-sata1-0-5,format=raw,cache=none 
-device ide-hd,bus=sata1.5,drive=drive-sata1-0-5,id=sata1-0-5 -drive 
file=/home/image/rhel7.0-6.qcow2,if=none,id=drive-sata2-0-0,format=raw,cache=none 
-device ide-hd,bus=sata2.0,drive=drive-sata2-0-0,id=sata2-0-0 -drive 
file=/home/image/rhel7.0-7.qcow2,if=none,id=drive-sata2-0-1,format=raw,cache=none 
-device ide-hd,bus=sata2.1,drive=drive-sata2-0-1,id=sata2-0-1 -drive 
file=/home/image/rhel7.0-8.qcow2,if=none,id=drive-sata2-0-2,format=raw,cache=none 
-device ide-hd,bus=sata2.2,drive=drive-sata2-0-2,id=sata2-0-2 -drive 
file=/home/image/rhel7.0-9.qcow2,if=none,id=drive-sata2-0-3,format=raw,cache=none 
-device ide-hd,bus=sata2.3,drive=drive-sata2-0-3,id=sata2-0-3 -drive 
file=/home/image/rhel7.0-10.qcow2,if=none,id=drive-sata2-0-4,format=raw,cache=none 
-device ide-hd,bus=sata2.4,drive=drive-sata2-0-4,id=sata2-0-4 -drive 
file=/home/image/rhel7.0-11.qcow2,if=none,id=drive-sata2-0-5,format=raw,cache=none 
-device ide-hd,bus=sata2.5,drive=drive-sata2-0-5,id=sata2-0-5 -drive 
file=/home/image/rhel7.0-12.qcow2,if=none,id=drive-sata3-0-0,format=raw,cache=none 
-device ide-hd,bus=sata3.0,drive=drive-sata3-0-0,id=sata3-0-0 -drive 
file=/home/image/rhel7.0-13.qcow2,if=none,id=drive-sata3-0-1,format=raw,cache=none 
-device ide-hd,bus=sata3.1,drive=drive-sata3-0-1,id=sata3-0-1 -drive 
file=/home/image/rhel7.0-14.qcow2,if=none,id=drive-sata3-0-2,format=raw,cache=none 
-device ide-hd,bus=sata3.2,drive=drive-sata3-0-2,id=sata3-0-2 -drive 
file=/home/image/rhel7.0-15.qcow2,if=none,id=drive-sata3-0-3,format=raw,cache=none 
-device ide-hd,bus=sata3.3,drive=drive-sata3-0-3,id=sata3-0-3 -drive 
file=/home/image/rhel7.0-16.qcow2,if=none,id=drive-sata3-0-4,format=raw,cache=none 
-device ide-hd,bus=sata3.4,drive=drive-sata3-0-4,id=sata3-0-4 -drive 
file=/home/image/rhel7.0-17.qcow2,if=none,id=drive-sata3-0-5,format=raw,cache=none 
-device ide-hd,bus=sata3.5,drive=drive-sata3-0-5,id=sata3-0-5 -drive 
file=/home/image/rhel7.0-18.qcow2,if=none,id=drive-sata4-0-0,format=raw,cache=none 
-device ide-hd,bus=sata4.0,drive=drive-sata4-0-0,id=sata4-0-0 -drive 
file=/home/image/rhel7.0-19.qcow2,if=none,id=drive-sata4-0-1,format=raw,cache=none 
-device ide-hd,bus=sata4.1,drive=drive-sata4-0-1,id=sata4-0-1 -drive 
file=/home/image/rhel7.0-20.qcow2,if=none,id=drive-sata4-0-2,format=raw,cache=none 
-device ide-hd,bus=sata4.2,drive=drive-sata4-0-2,id=sata4-0-2 -drive 
file=/home/image/rhel7.0-21.qcow2,if=none,id=drive-sata4-0-3,format=raw,cache=none 
-device ide-hd,bus=sata4.3,drive=drive-sata4-0-3,id=sata4-0-3 -drive 
file=/home/image/rhel7.0-22.qcow2,if=none,id=drive-sata4-0-4,format=raw,cache=none 
-device ide-hd,bus=sata4.4,drive=drive-sata4-0-4,id=sata4-0-4 -drive 
file=/home/image/rhel7.0-23.qcow2,if=none,id=drive-sata4-0-5,format=raw,cache=none 
-device ide-hd,bus=sata4.5,drive=drive-sata4-0-5,id=sata4-0-5 -drive 
file=/home/image/rhel7.0-24.qcow2,if=none,id=drive-sata5-0-0,format=raw,cache=none 
-device ide-hd,bus=sata5.0,drive=drive-sata5-0-0,id=sata5-0-0 -drive 
file=/home/image/rhel7.0-25.qcow2,if=none,id=drive-sata5-0-1,format=raw,cache=none 
-device ide-hd,bus=sata5.1,drive=drive-sata5-0-1,id=sata5-0-1 -drive 
file=/home/image/rhel7.0-26.qcow2,if=none,id=drive-sata5-0-2,format=raw,cache=none 
-device ide-hd,bus=sata5.2,drive=drive-sata5-0-2,id=sata5-0-2 -drive 
file=/home/image/rhel7.0-27.qcow2,if=none,id=drive-sata5-0-3,format=raw,cache=none 
-device ide-hd,bus=sata5.3,drive=drive-sata5-0-3,id=sata5-0-3 -drive 
file=/home/image/rhel7.0-28.qcow2,if=none,id=drive-sata5-0-4,format=raw,cache=none 
-device ide-hd,bus=sata5.4,drive=drive-sata5-0-4,id=sata5-0-4 -drive 
file=/home/image/rhel7.0-29.qcow2,if=none,id=drive-sata5-0-5,format=raw,cache=none 
-device ide-hd,bus=sata5.5,drive=drive-sata5-0-5,id=sata5-0-5 -drive 
file=/home/image/rhel7.0-30.qcow2,if=none,id=drive-sata6-0-0,format=raw,cache=none 
-device ide-hd,bus=sata6.0,drive=drive-sata6-0-0,id=sata6-0-0 -drive 
file=/home/image/rhel7.0-31.qcow2,if=none,id=drive-sata6-0-1,format=raw,cache=none 
-device ide-hd,bus=sata6.1,drive=drive-sata6-0-1,id=sata6-0-1 -drive 
file=/home/image/rhel7.0-32.qcow2,if=none,id=drive-sata6-0-2,format=raw,cache=none 
-device ide-hd,bus=sata6.2,drive=drive-sata6-0-2,id=sata6-0-2 -drive 
file=/home/image/rhel7.0-33.qcow2,if=none,id=drive-sata6-0-3,format=raw,cache=none 
-device ide-hd,bus=sata6.3,drive=drive-sata6-0-3,id=sata6-0-3 -drive 
file=/home/image/rhel7.0-34.qcow2,if=none,id=drive-sata6-0-4,format=raw,cache=none 
-device ide-hd,bus=sata6.4,drive=drive-sata6-0-4,id=sata6-0-4 -drive 
file=/home/image/rhel7.0-35.qcow2,if=none,id=drive-sata6-0-5,format=raw,cache=none 
-device ide-hd,bus=sata6.5,drive=drive-sata6-0-5,id=sata6-0-5 -drive 
file=/home/image/rhel7.0-36.qcow2,if=none,id=drive-sata7-0-0,format=raw,cache=none 
-device ide-hd,bus=sata7.0,drive=drive-sata7-0-0,id=sata7-0-0 -drive 
file=/home/image/rhel7.0-37.qcow2,if=none,id=drive-sata7-0-1,format=raw,cache=none 
-device ide-hd,bus=sata7.1,drive=drive-sata7-0-1,id=sata7-0-1 -drive 
file=/home/image/rhel7.0-38.qcow2,if=none,id=drive-sata7-0-2,format=raw,cache=none 
-device ide-hd,bus=sata7.2,drive=drive-sata7-0-2,id=sata7-0-2 -drive 
file=/home/image/rhel7.0-39.qcow2,if=none,id=drive-sata7-0-3,format=raw,cache=none 
-device ide-hd,bus=sata7.3,drive=drive-sata7-0-3,id=sata7-0-3 -drive 
file=/home/image/rhel7.0-40.qcow2,if=none,id=drive-sata7-0-4,format=raw,cache=none 
-device ide-hd,bus=sata7.4,drive=drive-sata7-0-4,id=sata7-0-4 -drive 
file=/home/image/rhel7.0-41.qcow2,if=none,id=drive-sata7-0-5,format=raw,cache=none 
-device ide-hd,bus=sata7.5,drive=drive-sata7-0-5,id=sata7-0-5 -drive 
file=/home/image/rhel7.0-42.qcow2,if=none,id=drive-sata8-0-0,format=raw,cache=none 
-device ide-hd,bus=sata8.0,drive=drive-sata8-0-0,id=sata8-0-0 -drive 
file=/home/image/rhel7.0-43.qcow2,if=none,id=drive-sata8-0-1,format=raw,cache=none 
-device ide-hd,bus=sata8.1,drive=drive-sata8-0-1,id=sata8-0-1 -drive 
file=/home/image/rhel7.0-44.qcow2,if=none,id=drive-sata8-0-2,format=raw,cache=none 
-device ide-hd,bus=sata8.2,drive=drive-sata8-0-2,id=sata8-0-2 -drive 
file=/home/image/rhel7.0-45.qcow2,if=none,id=drive-sata8-0-3,format=raw,cache=none 
-device ide-hd,bus=sata8.3,drive=drive-sata8-0-3,id=sata8-0-3 -drive 
file=/home/image/rhel7.0-46.qcow2,if=none,id=drive-sata8-0-4,format=raw,cache=none 
-device ide-hd,bus=sata8.4,drive=drive-sata8-0-4,id=sata8-0-4 -drive 
file=/home/image/rhel7.0-47.qcow2,if=none,id=drive-sata8-0-5,format=raw,cache=none 
-device ide-hd,bus=sata8.5,drive=drive-sata8-0-5,id=sata8-0-5 -drive 
file=/home/image/rhel7.0-48.qcow2,if=none,id=drive-sata9-0-0,format=raw,cache=none 
-device ide-hd,bus=sata9.0,drive=drive-sata9-0-0,id=sata9-0-0 -drive 
file=/home/image/rhel7.0-49.qcow2,if=none,id=drive-sata9-0-1,format=raw,cache=none 
-device ide-hd,bus=sata9.1,drive=drive-sata9-0-1,id=sata9-0-1 -drive 
file=/home/image/rhel7.0-50.qcow2,if=none,id=drive-sata9-0-2,format=raw,cache=none 
-device ide-hd,bus=sata9.2,drive=drive-sata9-0-2,id=sata9-0-2 -drive 
file=/home/image/rhel7.0-51.qcow2,if=none,id=drive-sata9-0-3,format=raw,cache=none 
-device ide-hd,bus=sata9.3,drive=drive-sata9-0-3,id=sata9-0-3 -drive 
file=/home/image/rhel7.0-52.qcow2,if=none,id=drive-sata9-0-4,format=raw,cache=none 
-device ide-hd,bus=sata9.4,drive=drive-sata9-0-4,id=sata9-0-4 -drive 
file=/home/image/rhel7.0-53.qcow2,if=none,id=drive-sata9-0-5,format=raw,cache=none 
-device ide-hd,bus=sata9.5,drive=drive-sata9-0-5,id=sata9-0-5 -drive 
file=/home/image/rhel7.0-54.qcow2,if=none,id=drive-sata10-0-0,format=raw,cache=none 
-device ide-hd,bus=sata10.0,drive=drive-sata10-0-0,id=sata10-0-0 -drive 
file=/home/image/rhel7.0-55.qcow2,if=none,id=drive-sata10-0-1,format=raw,cache=none 
-device ide-hd,bus=sata10.1,drive=drive-sata10-0-1,id=sata10-0-1 -drive 
file=/home/image/rhel7.0-56.qcow2,if=none,id=drive-sata10-0-2,format=raw,cache=none 
-device ide-hd,bus=sata10.2,drive=drive-sata10-0-2,id=sata10-0-2 -drive 
file=/home/image/rhel7.0-57.qcow2,if=none,id=drive-sata10-0-3,format=raw,cache=none 
-device ide-hd,bus=sata10.3,drive=drive-sata10-0-3,id=sata10-0-3 -drive 
file=/home/image/rhel7.0-58.qcow2,if=none,id=drive-sata10-0-4,format=raw,cache=none 
-device ide-hd,bus=sata10.4,drive=drive-sata10-0-4,id=sata10-0-4 -drive 
file=/home/image/rhel7.0-59.qcow2,if=none,id=drive-sata10-0-5,format=raw,cache=none 
-device ide-hd,bus=sata10.5,drive=drive-sata10-0-5,id=sata10-0-5 -drive 
file=/home/image/rhel7.0-60.qcow2,if=none,id=drive-sata11-0-0,format=raw,cache=none 
-device ide-hd,bus=sata11.0,drive=drive-sata11-0-0,id=sata11-0-0 -drive 
file=/home/image/rhel7.0-61.qcow2,if=none,id=drive-sata11-0-1,format=raw,cache=none 
-device ide-hd,bus=sata11.1,drive=drive-sata11-0-1,id=sata11-0-1 -drive 
file=/home/image/rhel7.0-62.qcow2,if=none,id=drive-sata11-0-2,format=raw,cache=none 
-device ide-hd,bus=sata11.2,drive=drive-sata11-0-2,id=sata11-0-2 -drive 
file=/home/image/rhel7.0-63.qcow2,if=none,id=drive-sata11-0-3,format=raw,cache=none 
-device ide-hd,bus=sata11.3,drive=drive-sata11-0-3,id=sata11-0-3 -drive 
file=/home/image/rhel7.0-64.qcow2,if=none,id=drive-sata11-0-4,format=raw,cache=none 
-device ide-hd,bus=sata11.4,drive=drive-sata11-0-4,id=sata11-0-4 -drive 
file=/home/image/rhel7.0-65.qcow2,if=none,id=drive-sata11-0-5,format=raw,cache=none 
-device ide-hd,bus=sata11.5,drive=drive-sata11-0-5,id=sata11-0-5 -drive 
file=/home/image/rhel7.0-66.qcow2,if=none,id=drive-sata12-0-0,format=raw,cache=none 
-device ide-hd,bus=sata12.0,drive=drive-sata12-0-0,id=sata12-0-0 -drive 
file=/home/image/rhel7.0-67.qcow2,if=none,id=drive-sata12-0-1,format=raw,cache=none 
-device ide-hd,bus=sata12.1,drive=drive-sata12-0-1,id=sata12-0-1 -drive 
file=/home/image/rhel7.0-68.qcow2,if=none,id=drive-sata12-0-2,format=raw,cache=none 
-device ide-hd,bus=sata12.2,drive=drive-sata12-0-2,id=sata12-0-2 -drive 
file=/home/image/rhel7.0-69.qcow2,if=none,id=drive-sata12-0-3,format=raw,cache=none 
-device ide-hd,bus=sata12.3,drive=drive-sata12-0-3,id=sata12-0-3 -drive 
file=/home/image/rhel7.0-70.qcow2,if=none,id=drive-sata12-0-4,format=raw,cache=none 
-device ide-hd,bus=sata12.4,drive=drive-sata12-0-4,id=sata12-0-4 -drive 
file=/home/image/rhel7.0-71.qcow2,if=none,id=drive-sata12-0-5,format=raw,cache=none 
-device ide-hd,bus=sata12.5,drive=drive-sata12-0-5,id=sata12-0-5 -drive 
file=/home/image/rhel7.0-72.qcow2,if=none,id=drive-sata13-0-0,format=raw,cache=none 
-device ide-hd,bus=sata13.0,drive=drive-sata13-0-0,id=sata13-0-0 -drive 
file=/home/image/rhel7.0-73.qcow2,if=none,id=drive-sata13-0-1,format=raw,cache=none 
-device ide-hd,bus=sata13.1,drive=drive-sata13-0-1,id=sata13-0-1 -drive 
file=/home/image/rhel7.0-74.qcow2,if=none,id=drive-sata13-0-2,format=raw,cache=none 
-device ide-hd,bus=sata13.2,drive=drive-sata13-0-2,id=sata13-0-2 -drive 
file=/home/image/rhel7.0-75.qcow2,if=none,id=drive-sata13-0-3,format=raw,cache=none 
-device ide-hd,bus=sata13.3,drive=drive-sata13-0-3,id=sata13-0-3 -drive 
file=/home/image/rhel7.0-76.qcow2,if=none,id=drive-sata13-0-4,format=raw,cache=none 
-device ide-hd,bus=sata13.4,drive=drive-sata13-0-4,id=sata13-0-4 -drive 
file=/home/image/rhel7.0-77.qcow2,if=none,id=drive-sata13-0-5,format=raw,cache=none 
-device ide-hd,bus=sata13.5,drive=drive-sata13-0-5,id=sata13-0-5 -drive 
file=/home/image/rhel7.0-78.qcow2,if=none,id=drive-sata14-0-0,format=raw,cache=none 
-device ide-hd,bus=sata14.0,drive=drive-sata14-0-0,id=sata14-0-0 -drive 
file=/home/image/rhel7.0-79.qcow2,if=none,id=drive-sata14-0-1,format=raw,cache=none 
-device ide-hd,bus=sata14.1,drive=drive-sata14-0-1,id=sata14-0-1 -drive 
file=/home/image/rhel7.0-80.qcow2,if=none,id=drive-sata14-0-2,format=raw,cache=none 
-device ide-hd,bus=sata14.2,drive=drive-sata14-0-2,id=sata14-0-2 -drive 
file=/home/image/rhel7.0-81.qcow2,if=none,id=drive-sata14-0-3,format=raw,cache=none 
-device ide-hd,bus=sata14.3,drive=drive-sata14-0-3,id=sata14-0-3 -drive 
file=/home/image/rhel7.0-82.qcow2,if=none,id=drive-sata14-0-4,format=raw,cache=none 
-device ide-hd,bus=sata14.4,drive=drive-sata14-0-4,id=sata14-0-4 -drive 
file=/home/image/rhel7.0-83.qcow2,if=none,id=drive-sata14-0-5,format=raw,cache=none 
-device ide-hd,bus=sata14.5,drive=drive-sata14-0-5,id=sata14-0-5 -drive 
file=/home/image/rhel7.0-84.qcow2,if=none,id=drive-sata15-0-0,format=raw,cache=none 
-device ide-hd,bus=sata15.0,drive=drive-sata15-0-0,id=sata15-0-0 -drive 
file=/home/image/rhel7.0-85.qcow2,if=none,id=drive-sata15-0-1,format=raw,cache=none 
-device ide-hd,bus=sata15.1,drive=drive-sata15-0-1,id=sata15-0-1 -drive 
file=/home/image/rhel7.0-86.qcow2,if=none,id=drive-sata15-0-2,format=raw,cache=none 
-device ide-hd,bus=sata15.2,drive=drive-sata15-0-2,id=sata15-0-2 -drive 
file=/home/image/rhel7.0-87.qcow2,if=none,id=drive-sata15-0-3,format=raw,cache=none 
-device ide-hd,bus=sata15.3,drive=drive-sata15-0-3,id=sata15-0-3 -drive 
file=/home/image/rhel7.0-88.qcow2,if=none,id=drive-sata15-0-4,format=raw,cache=none 
-device ide-hd,bus=sata15.4,drive=drive-sata15-0-4,id=sata15-0-4 -drive 
file=/home/image/rhel7.0-89.qcow2,if=none,id=drive-sata15-0-5,format=raw,cache=none 
-device ide-hd,bus=sata15.5,drive=drive-sata15-0-5,id=sata15-0-5 -drive 
file=/home/image/rhel7.0-90.qcow2,if=none,id=drive-sata16-0-0,format=raw,cache=none 
-device ide-hd,bus=sata16.0,drive=drive-sata16-0-0,id=sata16-0-0 -drive 
file=/home/image/rhel7.0-91.qcow2,if=none,id=drive-sata16-0-1,format=raw,cache=none 
-device ide-hd,bus=sata16.1,drive=drive-sata16-0-1,id=sata16-0-1 -drive 
file=/home/image/rhel7.0-92.qcow2,if=none,id=drive-sata16-0-2,format=raw,cache=none 
-device ide-hd,bus=sata16.2,drive=drive-sata16-0-2,id=sata16-0-2 -drive 
file=/home/image/rhel7.0-93.qcow2,if=none,id=drive-sata16-0-3,format=raw,cache=none 
-device ide-hd,bus=sata16.3,drive=drive-sata16-0-3,id=sata16-0-3 -drive 
file=/home/image/rhel7.0-94.qcow2,if=none,id=drive-sata16-0-4,format=raw,cache=none 
-device ide-hd,bus=sata16.4,drive=drive-sata16-0-4,id=sata16-0-4 -drive 
file=/home/image/rhel7.0-95.qcow2,if=none,id=drive-sata16-0-5,format=raw,cache=none 
-device ide-hd,bus=sata16.5,drive=drive-sata16-0-5,id=sata16-0-5 -drive 
file=/home/image/rhel7.0-96.qcow2,if=none,id=drive-sata17-0-0,format=raw,cache=none 
-device ide-hd,bus=sata17.0,drive=drive-sata17-0-0,id=sata17-0-0 -drive 
file=/home/image/rhel7.0-97.qcow2,if=none,id=drive-sata17-0-1,format=raw,cache=none 
-device ide-hd,bus=sata17.1,drive=drive-sata17-0-1,id=sata17-0-1 -drive 
file=/home/image/rhel7.0-98.qcow2,if=none,id=drive-sata17-0-2,format=raw,cache=none 
-device ide-hd,bus=sata17.2,drive=drive-sata17-0-2,id=sata17-0-2 -drive 
file=/home/image/rhel7.0-99.qcow2,if=none,id=drive-sata17-0-3,format=raw,cache=none 
-device ide-hd,bus=sata17.3,drive=drive-sata17-0-3,id=sata17-0-3 -drive 
file=/home/image/rhel7.0-100.qcow2,if=none,id=drive-sata17-0-4,format=raw,cache=none 
-device ide-hd,bus=sata17.4,drive=drive-sata17-0-4,id=sata17-0-4 -drive 
file=/home/image/rhel7.0-101.qcow2,if=none,id=drive-sata17-0-5,format=raw,cache=none 
-device ide-hd,bus=sata17.5,drive=drive-sata17-0-5,id=sata17-0-5 -drive 
file=/home/image/rhel7.0-102.qcow2,if=none,id=drive-sata18-0-0,format=raw,cache=none 
-device ide-hd,bus=sata18.0,drive=drive-sata18-0-0,id=sata18-0-0 -drive 
file=/home/image/rhel7.0-103.qcow2,if=none,id=drive-sata18-0-1,format=raw,cache=none 
-device ide-hd,bus=sata18.1,drive=drive-sata18-0-1,id=sata18-0-1 -drive 
file=/home/image/rhel7.0-104.qcow2,if=none,id=drive-sata18-0-2,format=raw,cache=none 
-device ide-hd,bus=sata18.2,drive=drive-sata18-0-2,id=sata18-0-2 -drive 
file=/home/image/rhel7.0-105.qcow2,if=none,id=drive-sata18-0-3,format=raw,cache=none 
-device ide-hd,bus=sata18.3,drive=drive-sata18-0-3,id=sata18-0-3 -drive 
file=/home/image/rhel7.0-106.qcow2,if=none,id=drive-sata18-0-4,format=raw,cache=none 
-device ide-hd,bus=sata18.4,drive=drive-sata18-0-4,id=sata18-0-4 -drive 
file=/home/image/rhel7.0-107.qcow2,if=none,id=drive-sata18-0-5,format=raw,cache=none 
-device ide-hd,bus=sata18.5,drive=drive-sata18-0-5,id=sata18-0-5 -drive 
file=/home/image/rhel7.0-108.qcow2,if=none,id=drive-sata19-0-0,format=raw,cache=none 
-device ide-hd,bus=sata19.0,drive=drive-sata19-0-0,id=sata19-0-0 -drive 
file=/home/image/rhel7.0-109.qcow2,if=none,id=drive-sata19-0-1,format=raw,cache=none 
-device ide-hd,bus=sata19.1,drive=drive-sata19-0-1,id=sata19-0-1 -drive 
file=/home/image/rhel7.0-110.qcow2,if=none,id=drive-sata19-0-2,format=raw,cache=none 
-device ide-hd,bus=sata19.2,drive=drive-sata19-0-2,id=sata19-0-2 -drive 
file=/home/image/rhel7.0-111.qcow2,if=none,id=drive-sata19-0-3,format=raw,cache=none 
-device ide-hd,bus=sata19.3,drive=drive-sata19-0-3,id=sata19-0-3 -drive 
file=/home/image/rhel7.0-112.qcow2,if=none,id=drive-sata19-0-4,format=raw,cache=none 
-device ide-hd,bus=sata19.4,drive=drive-sata19-0-4,id=sata19-0-4 -drive 
file=/home/image/rhel7.0-113.qcow2,if=none,id=drive-sata19-0-5,format=raw,cache=none 
-device ide-hd,bus=sata19.5,drive=drive-sata19-0-5,id=sata19-0-5 -drive 
file=/home/image/rhel7.0-114.qcow2,if=none,id=drive-sata20-0-0,format=raw,cache=none 
-device ide-hd,bus=sata20.0,drive=drive-sata20-0-0,id=sata20-0-0 -drive 
file=/home/image/rhel7.0-115.qcow2,if=none,id=drive-sata20-0-1,format=raw,cache=none 
-device ide-hd,bus=sata20.1,drive=drive-sata20-0-1,id=sata20-0-1 -drive 
file=/home/image/rhel7.0-116.qcow2,if=none,id=drive-sata20-0-2,format=raw,cache=none 
-device ide-hd,bus=sata20.2,drive=drive-sata20-0-2,id=sata20-0-2 -drive 
file=/home/image/rhel7.0-117.qcow2,if=none,id=drive-sata20-0-3,format=raw,cache=none 
-device ide-hd,bus=sata20.3,drive=drive-sata20-0-3,id=sata20-0-3 -drive 
file=/home/image/rhel7.0-118.qcow2,if=none,id=drive-sata20-0-4,format=raw,cache=none 
-device ide-hd,bus=sata20.4,drive=drive-sata20-0-4,id=sata20-0-4 -drive 
file=/home/image/rhel7.0-119.qcow2,if=none,id=drive-sata20-0-5,format=raw,cache=none 
-device ide-hd,bus=sata20.5,drive=drive-sata20-0-5,id=sata20-0-5 -drive 
file=/home/image/rhel7.0-120.qcow2,if=none,id=drive-sata21-0-0,format=raw,cache=none 
-device ide-hd,bus=sata21.0,drive=drive-sata21-0-0,id=sata21-0-0 -drive 
file=/home/image/rhel7.0-121.qcow2,if=none,id=drive-sata21-0-1,format=raw,cache=none 
-device ide-hd,bus=sata21.1,drive=drive-sata21-0-1,id=sata21-0-1 -drive 
file=/home/image/rhel7.0-122.qcow2,if=none,id=drive-sata21-0-2,format=raw,cache=none 
-device ide-hd,bus=sata21.2,drive=drive-sata21-0-2,id=sata21-0-2 -drive 
file=/home/image/rhel7.0-123.qcow2,if=none,id=drive-sata21-0-3,format=raw,cache=none 
-device ide-hd,bus=sata21.3,drive=drive-sata21-0-3,id=sata21-0-3 -drive 
file=/home/image/rhel7.0-124.qcow2,if=none,id=drive-sata21-0-4,format=raw,cache=none 
-device ide-hd,bus=sata21.4,drive=drive-sata21-0-4,id=sata21-0-4 -drive 
file=/home/image/rhel7.0-125.qcow2,if=none,id=drive-sata21-0-5,format=raw,cache=none 
-device ide-hd,bus=sata21.5,drive=drive-sata21-0-5,id=sata21-0-5 -drive 
file=/home/image/rhel7.0-126.qcow2,if=none,id=drive-sata22-0-0,format=raw,cache=none 
-device ide-hd,bus=sata22.0,drive=drive-sata22-0-0,id=sata22-0-0 -drive 
file=/home/image/rhel7.0-127.qcow2,if=none,id=drive-sata22-0-1,format=raw,cache=none 
-device ide-hd,bus=sata22.1,drive=drive-sata22-0-1,id=sata22-0-1 -drive 
file=/home/image/rhel7.0-128.qcow2,if=none,id=drive-sata22-0-2,format=raw,cache=none 
-device ide-hd,bus=sata22.2,drive=drive-sata22-0-2,id=sata22-0-2 -drive 
file=/home/image/rhel7.0-129.qcow2,if=none,id=drive-sata22-0-3,format=raw,cache=none 
-device ide-hd,bus=sata22.3,drive=drive-sata22-0-3,id=sata22-0-3 -drive 
file=/home/image/rhel7.0-130.qcow2,if=none,id=drive-sata22-0-4,format=raw,cache=none 
-device ide-hd,bus=sata22.4,drive=drive-sata22-0-4,id=sata22-0-4 -drive 
file=/home/image/rhel7.0-131.qcow2,if=none,id=drive-sata22-0-5,format=raw,cache=none 
-device ide-hd,bus=sata22.5,drive=drive-sata22-0-5,id=sata22-0-5 -drive 
file=/home/image/rhel7.0-132.qcow2,if=none,id=drive-sata23-0-0,format=raw,cache=none 
-device ide-hd,bus=sata23.0,drive=drive-sata23-0-0,id=sata23-0-0 -drive 
file=/home/image/rhel7.0-133.qcow2,if=none,id=drive-sata23-0-1,format=raw,cache=none 
-device ide-hd,bus=sata23.1,drive=drive-sata23-0-1,id=sata23-0-1 -drive 
file=/home/image/rhel7.0-134.qcow2,if=none,id=drive-sata23-0-2,format=raw,cache=none 
-device ide-hd,bus=sata23.2,drive=drive-sata23-0-2,id=sata23-0-2 -drive 
file=/home/image/rhel7.0-135.qcow2,if=none,id=drive-sata23-0-3,format=raw,cache=none 
-device ide-hd,bus=sata23.3,drive=drive-sata23-0-3,id=sata23-0-3 -drive 
file=/home/image/rhel7.0-136.qcow2,if=none,id=drive-sata23-0-4,format=raw,cache=none 
-device ide-hd,bus=sata23.4,drive=drive-sata23-0-4,id=sata23-0-4 -drive 
file=/home/image/rhel7.0-137.qcow2,if=none,id=drive-sata23-0-5,format=raw,cache=none 
-device ide-hd,bus=sata23.5,drive=drive-sata23-0-5,id=sata23-0-5 -drive 
file=/home/image/rhel7.0-138.qcow2,if=none,id=drive-sata24-0-0,format=raw,cache=none 
-device ide-hd,bus=sata24.0,drive=drive-sata24-0-0,id=sata24-0-0 -drive 
file=/home/image/rhel7.0-139.qcow2,if=none,id=drive-sata24-0-1,format=raw,cache=none 
-device ide-hd,bus=sata24.1,drive=drive-sata24-0-1,id=sata24-0-1 -drive 
file=/home/image/rhel7.0-140.qcow2,if=none,id=drive-sata24-0-2,format=raw,cache=none 
-device ide-hd,bus=sata24.2,drive=drive-sata24-0-2,id=sata24-0-2 -drive 
file=/home/image/rhel7.0-141.qcow2,if=none,id=drive-sata24-0-3,format=raw,cache=none 
-device ide-hd,bus=sata24.3,drive=drive-sata24-0-3,id=sata24-0-3 -drive 
file=/home/image/rhel7.0-142.qcow2,if=none,id=drive-sata24-0-4,format=raw,cache=none 
-device ide-hd,bus=sata24.4,drive=drive-sata24-0-4,id=sata24-0-4 -drive 
file=/home/image/rhel7.0-143.qcow2,if=none,id=drive-sata24-0-5,format=raw,cache=none 
-device ide-hd,bus=sata24.5,drive=drive-sata24-0-5,id=sata24-0-5 -drive 
file=/home/image/rhel7.0-144.qcow2,if=none,id=drive-sata25-0-0,format=raw,cache=none 
-device ide-hd,bus=sata25.0,drive=drive-sata25-0-0,id=sata25-0-0 -drive 
file=/home/image/rhel7.0-145.qcow2,if=none,id=drive-sata25-0-1,format=raw,cache=none 
-device ide-hd,bus=sata25.1,drive=drive-sata25-0-1,id=sata25-0-1 -drive 
file=/home/image/rhel7.0-146.qcow2,if=none,id=drive-sata25-0-2,format=raw,cache=none 
-device ide-hd,bus=sata25.2,drive=drive-sata25-0-2,id=sata25-0-2 -drive 
file=/home/image/rhel7.0-147.qcow2,if=none,id=drive-sata25-0-3,format=raw,cache=none 
-device ide-hd,bus=sata25.3,drive=drive-sata25-0-3,id=sata25-0-3 -drive 
file=/home/image/rhel7.0-148.qcow2,if=none,id=drive-sata25-0-4,format=raw,cache=none 
-device ide-hd,bus=sata25.4,drive=drive-sata25-0-4,id=sata25-0-4 -drive 
file=/home/image/rhel7.0-149.qcow2,if=none,id=drive-sata25-0-5,format=raw,cache=none 
-device ide-hd,bus=sata25.5,drive=drive-sata25-0-5,id=sata25-0-5 -drive 
file=/home/image/rhel7.0-150.qcow2,if=none,id=drive-sata26-0-0,format=raw,cache=none 
-device ide-hd,bus=sata26.0,drive=drive-sata26-0-0,id=sata26-0-0 -drive 
file=/home/image/rhel7.0-151.qcow2,if=none,id=drive-sata26-0-1,format=raw,cache=none 
-device ide-hd,bus=sata26.1,drive=drive-sata26-0-1,id=sata26-0-1 -drive 
file=/home/image/rhel7.0-152.qcow2,if=none,id=drive-sata26-0-2,format=raw,cache=none 
-device ide-hd,bus=sata26.2,drive=drive-sata26-0-2,id=sata26-0-2 -drive 
file=/home/image/rhel7.0-153.qcow2,if=none,id=drive-sata26-0-3,format=raw,cache=none 
-device ide-hd,bus=sata26.3,drive=drive-sata26-0-3,id=sata26-0-3 -drive 
file=/home/image/rhel7.0-154.qcow2,if=none,id=drive-sata26-0-4,format=raw,cache=none 
-device ide-hd,bus=sata26.4,drive=drive-sata26-0-4,id=sata26-0-4 -drive 
file=/home/image/rhel7.0-155.qcow2,if=none,id=drive-sata26-0-5,format=raw,cache=none 
-device ide-hd,bus=sata26.5,drive=drive-sata26-0-5,id=sata26-0-5 -drive 
file=/home/image/rhel7.0-156.qcow2,if=none,id=drive-sata27-0-0,format=raw,cache=none 
-device ide-hd,bus=sata27.0,drive=drive-sata27-0-0,id=sata27-0-0 -drive 
file=/home/image/rhel7.0-157.qcow2,if=none,id=drive-sata27-0-1,format=raw,cache=none 
-device ide-hd,bus=sata27.1,drive=drive-sata27-0-1,id=sata27-0-1 -drive 
file=/home/image/rhel7.0-158.qcow2,if=none,id=drive-sata27-0-2,format=raw,cache=none 
-device ide-hd,bus=sata27.2,drive=drive-sata27-0-2,id=sata27-0-2 -drive 
file=/home/image/rhel7.0-159.qcow2,if=none,id=drive-sata27-0-3,format=raw,cache=none 
-device ide-hd,bus=sata27.3,drive=drive-sata27-0-3,id=sata27-0-3 -drive 
file=/home/image/rhel7.0-160.qcow2,if=none,id=drive-sata27-0-4,format=raw,cache=none 
-device ide-hd,bus=sata27.4,drive=drive-sata27-0-4,id=sata27-0-4 -drive 
file=/home/image/rhel7.0-161.qcow2,if=none,id=drive-sata27-0-5,format=raw,cache=none 
-device ide-hd,bus=sata27.5,drive=drive-sata27-0-5,id=sata27-0-5 -drive 
file=/home/image/rhel7.0-162.qcow2,if=none,id=drive-sata28-0-0,format=raw,cache=none 
-device ide-hd,bus=sata28.0,drive=drive-sata28-0-0,id=sata28-0-0 -drive 
file=/home/image/rhel7.0-163.qcow2,if=none,id=drive-sata28-0-1,format=raw,cache=none 
-device ide-hd,bus=sata28.1,drive=drive-sata28-0-1,id=sata28-0-1 -drive 
file=/home/image/rhel7.0-164.qcow2,if=none,id=drive-sata28-0-2,format=raw,cache=none 
-device ide-hd,bus=sata28.2,drive=drive-sata28-0-2,id=sata28-0-2 -drive 
file=/home/image/rhel7.0-165.qcow2,if=none,id=drive-sata28-0-3,format=raw,cache=none 
-device ide-hd,bus=sata28.3,drive=drive-sata28-0-3,id=sata28-0-3 -drive 
file=/home/image/rhel7.0-166.qcow2,if=none,id=drive-sata28-0-4,format=raw,cache=none 
-device ide-hd,bus=sata28.4,drive=drive-sata28-0-4,id=sata28-0-4 -drive 
file=/home/image/rhel7.0-167.qcow2,if=none,id=drive-sata28-0-5,format=raw,cache=none 
-device ide-hd,bus=sata28.5,drive=drive-sata28-0-5,id=sata28-0-5 -drive 
file=/home/image/rhel7.0-168.qcow2,if=none,id=drive-sata29-0-0,format=raw,cache=none 
-device ide-hd,bus=sata29.0,drive=drive-sata29-0-0,id=sata29-0-0 -drive 
file=/home/image/rhel7.0-169.qcow2,if=none,id=drive-sata29-0-1,format=raw,cache=none 
-device ide-hd,bus=sata29.1,drive=drive-sata29-0-1,id=sata29-0-1 -drive 
file=/home/image/rhel7.0-170.qcow2,if=none,id=drive-sata29-0-2,format=raw,cache=none 
-device ide-hd,bus=sata29.2,drive=drive-sata29-0-2,id=sata29-0-2 -drive 
file=/home/image/rhel7.0-171.qcow2,if=none,id=drive-sata29-0-3,format=raw,cache=none 
-device ide-hd,bus=sata29.3,drive=drive-sata29-0-3,id=sata29-0-3 -drive 
file=/home/image/rhel7.0-172.qcow2,if=none,id=drive-sata29-0-4,format=raw,cache=none 
-device ide-hd,bus=sata29.4,drive=drive-sata29-0-4,id=sata29-0-4 -drive 
file=/home/image/rhel7.0-173.qcow2,if=none,id=drive-sata29-0-5,format=raw,cache=none 
-device ide-hd,bus=sata29.5,drive=drive-sata29-0-5,id=sata29-0-5 -drive 
file=/home/image/rhel7.0-174.qcow2,if=none,id=drive-sata30-0-0,format=raw,cache=none 
-device ide-hd,bus=sata30.0,drive=drive-sata30-0-0,id=sata30-0-0 -drive 
file=/home/image/rhel7.0-175.qcow2,if=none,id=drive-sata30-0-1,format=raw,cache=none 
-device ide-hd,bus=sata30.1,drive=drive-sata30-0-1,id=sata30-0-1 -drive 
file=/home/image/rhel7.0-176.qcow2,if=none,id=drive-sata30-0-2,format=raw,cache=none 
-device ide-hd,bus=sata30.2,drive=drive-sata30-0-2,id=sata30-0-2 -drive 
file=/home/image/rhel7.0-177.qcow2,if=none,id=drive-sata30-0-3,format=raw,cache=none 
-device ide-hd,bus=sata30.3,drive=drive-sata30-0-3,id=sata30-0-3 -drive 
file=/home/image/rhel7.0-178.qcow2,if=none,id=drive-sata30-0-4,format=raw,cache=none 
-device ide-hd,bus=sata30.4,drive=drive-sata30-0-4,id=sata30-0-4 -drive 
file=/home/image/rhel7.0-179.qcow2,if=none,id=drive-sata30-0-5,format=raw,cache=none 
-device ide-hd,bus=sata30.5,drive=drive-sata30-0-5,id=sata30-0-5 -drive 
file=/home/image/rhel7.0-180.qcow2,if=none,id=drive-sata31-0-0,format=raw,cache=none 
-device ide-hd,bus=sata31.0,drive=drive-sata31-0-0,id=sata31-0-0 -drive 
file=/home/image/rhel7.0-181.qcow2,if=none,id=drive-sata31-0-1,format=raw,cache=none 
-device ide-hd,bus=sata31.1,drive=drive-sata31-0-1,id=sata31-0-1 -drive 
file=/home/image/rhel7.0-182.qcow2,if=none,id=drive-sata31-0-2,format=raw,cache=none 
-device ide-hd,bus=sata31.2,drive=drive-sata31-0-2,id=sata31-0-2 -drive 
file=/home/image/rhel7.0-183.qcow2,if=none,id=drive-sata31-0-3,format=raw,cache=none 
-device ide-hd,bus=sata31.3,drive=drive-sata31-0-3,id=sata31-0-3 -drive 
file=/home/image/rhel7.0-184.qcow2,if=none,id=drive-sata31-0-4,format=raw,cache=none 
-device ide-hd,bus=sata31.4,drive=drive-sata31-0-4,id=sata31-0-4 -drive 
file=/home/image/rhel7.0-185.qcow2,if=none,id=drive-sata31-0-5,format=raw,cache=none 
-device ide-hd,bus=sata31.5,drive=drive-sata31-0-5,id=sata31-0-5 -drive 
file=/home/image/rhel7.0-186.qcow2,if=none,id=drive-sata32-0-0,format=raw,cache=none 
-device ide-hd,bus=sata32.0,drive=drive-sata32-0-0,id=sata32-0-0 -drive 
file=/home/image/rhel7.0-187.qcow2,if=none,id=drive-sata32-0-1,format=raw,cache=none 
-device ide-hd,bus=sata32.1,drive=drive-sata32-0-1,id=sata32-0-1 -drive 
file=/home/image/rhel7.0-188.qcow2,if=none,id=drive-sata32-0-2,format=raw,cache=none 
-device ide-hd,bus=sata32.2,drive=drive-sata32-0-2,id=sata32-0-2 -drive 
file=/home/image/rhel7.0-189.qcow2,if=none,id=drive-sata32-0-3,format=raw,cache=none 
-device ide-hd,bus=sata32.3,drive=drive-sata32-0-3,id=sata32-0-3 -drive 
file=/home/image/rhel7.0-190.qcow2,if=none,id=drive-sata32-0-4,format=raw,cache=none 
-device ide-hd,bus=sata32.4,drive=drive-sata32-0-4,id=sata32-0-4 -drive 
file=/home/image/rhel7.0-191.qcow2,if=none,id=drive-sata32-0-5,format=raw,cache=none 
-device ide-hd,bus=sata32.5,drive=drive-sata32-0-5,id=sata32-0-5 -drive 
file=/home/image/rhel7.0-192.qcow2,if=none,id=drive-sata33-0-0,format=raw,cache=none 
-device ide-hd,bus=sata33.0,drive=drive-sata33-0-0,id=sata33-0-0 -drive 
file=/home/image/rhel7.0-193.qcow2,if=none,id=drive-sata33-0-1,format=raw,cache=none 
-device ide-hd,bus=sata33.1,drive=drive-sata33-0-1,id=sata33-0-1 -drive 
file=/home/image/rhel7.0-194.qcow2,if=none,id=drive-sata33-0-2,format=raw,cache=none 
-device ide-hd,bus=sata33.2,drive=drive-sata33-0-2,id=sata33-0-2 -drive 
file=/home/image/rhel7.0-195.qcow2,if=none,id=drive-sata33-0-3,format=raw,cache=none 
-device ide-hd,bus=sata33.3,drive=drive-sata33-0-3,id=sata33-0-3 -drive 
file=/home/image/rhel7.0-196.qcow2,if=none,id=drive-sata33-0-4,format=raw,cache=none 
-device ide-hd,bus=sata33.4,drive=drive-sata33-0-4,id=sata33-0-4 -drive 
file=/home/image/rhel7.0-197.qcow2,if=none,id=drive-sata33-0-5,format=raw,cache=none 
-device ide-hd,bus=sata33.5,drive=drive-sata33-0-5,id=sata33-0-5 -drive 
file=/home/image/rhel7.0-198.qcow2,if=none,id=drive-sata34-0-0,format=raw,cache=none 
-device ide-hd,bus=sata34.0,drive=drive-sata34-0-0,id=sata34-0-0 -drive 
file=/home/image/rhel7.0-199.qcow2,if=none,id=drive-sata34-0-1,format=raw,cache=none 
-device ide-hd,bus=sata34.1,drive=drive-sata34-0-1,id=sata34-0-1 -drive 
file=/home/image/rhel7.0-200.qcow2,if=none,id=drive-sata34-0-2,format=raw,cache=none 
-device ide-hd,bus=sata34.2,drive=drive-sata34-0-2,id=sata34-0-2 -drive 
file=/home/image/rhel7.0-201.qcow2,if=none,id=drive-sata34-0-3,format=raw,cache=none 
-device ide-hd,bus=sata34.3,drive=drive-sata34-0-3,id=sata34-0-3 -drive 
file=/home/image/rhel7.0-202.qcow2,if=none,id=drive-sata34-0-4,format=raw,cache=none 
-device ide-hd,bus=sata34.4,drive=drive-sata34-0-4,id=sata34-0-4 -drive 
file=/home/image/rhel7.0-203.qcow2,if=none,id=drive-sata34-0-5,format=raw,cache=none 
-device ide-hd,bus=sata34.5,drive=drive-sata34-0-5,id=sata34-0-5 -drive 
file=/home/image/rhel7.0-204.qcow2,if=none,id=drive-sata35-0-0,format=raw,cache=none 
-device ide-hd,bus=sata35.0,drive=drive-sata35-0-0,id=sata35-0-0 -drive 
file=/home/image/rhel7.0-205.qcow2,if=none,id=drive-sata35-0-1,format=raw,cache=none 
-device ide-hd,bus=sata35.1,drive=drive-sata35-0-1,id=sata35-0-1 -drive 
file=/home/image/rhel7.0-206.qcow2,if=none,id=drive-sata35-0-2,format=raw,cache=none 
-device ide-hd,bus=sata35.2,drive=drive-sata35-0-2,id=sata35-0-2 -drive 
file=/home/image/rhel7.0-207.qcow2,if=none,id=drive-sata35-0-3,format=raw,cache=none 
-device ide-hd,bus=sata35.3,drive=drive-sata35-0-3,id=sata35-0-3 -drive 
file=/home/image/rhel7.0-208.qcow2,if=none,id=drive-sata35-0-4,format=raw,cache=none 
-device ide-hd,bus=sata35.4,drive=drive-sata35-0-4,id=sata35-0-4 -drive 
file=/home/image/rhel7.0-209.qcow2,if=none,id=drive-sata35-0-5,format=raw,cache=none 
-device ide-hd,bus=sata35.5,drive=drive-sata35-0-5,id=sata35-0-5 -drive 
file=/home/image/rhel7.0-210.qcow2,if=none,id=drive-sata36-0-0,format=raw,cache=none 
-device ide-hd,bus=sata36.0,drive=drive-sata36-0-0,id=sata36-0-0 -drive 
file=/home/image/rhel7.0-211.qcow2,if=none,id=drive-sata36-0-1,format=raw,cache=none 
-device ide-hd,bus=sata36.1,drive=drive-sata36-0-1,id=sata36-0-1 -drive 
file=/home/image/rhel7.0-212.qcow2,if=none,id=drive-sata36-0-2,format=raw,cache=none 
-device ide-hd,bus=sata36.2,drive=drive-sata36-0-2,id=sata36-0-2 -drive 
file=/home/image/rhel7.0-213.qcow2,if=none,id=drive-sata36-0-3,format=raw,cache=none 
-device ide-hd,bus=sata36.3,drive=drive-sata36-0-3,id=sata36-0-3 -drive 
file=/home/image/rhel7.0-214.qcow2,if=none,id=drive-sata36-0-4,format=raw,cache=none 
-device ide-hd,bus=sata36.4,drive=drive-sata36-0-4,id=sata36-0-4 -drive 
file=/home/image/rhel7.0-215.qcow2,if=none,id=drive-sata36-0-5,format=raw,cache=none 
-device ide-hd,bus=sata36.5,drive=drive-sata36-0-5,id=sata36-0-5 -drive 
file=/home/image/rhel7.0-216.qcow2,if=none,id=drive-sata37-0-0,format=raw,cache=none 
-device ide-hd,bus=sata37.0,drive=drive-sata37-0-0,id=sata37-0-0 -drive 
file=/home/image/rhel7.0-217.qcow2,if=none,id=drive-sata37-0-1,format=raw,cache=none 
-device ide-hd,bus=sata37.1,drive=drive-sata37-0-1,id=sata37-0-1 -drive 
file=/home/image/rhel7.0-218.qcow2,if=none,id=drive-sata37-0-2,format=raw,cache=none 
-device ide-hd,bus=sata37.2,drive=drive-sata37-0-2,id=sata37-0-2 -drive 
file=/home/image/rhel7.0-219.qcow2,if=none,id=drive-sata37-0-3,format=raw,cache=none 
-device ide-hd,bus=sata37.3,drive=drive-sata37-0-3,id=sata37-0-3 -drive 
file=/home/image/rhel7.0-220.qcow2,if=none,id=drive-sata37-0-4,format=raw,cache=none 
-device ide-hd,bus=sata37.4,drive=drive-sata37-0-4,id=sata37-0-4 -drive 
file=/home/image/rhel7.0-221.qcow2,if=none,id=drive-sata37-0-5,format=raw,cache=none 
-device ide-hd,bus=sata37.5,drive=drive-sata37-0-5,id=sata37-0-5 -drive 
file=/home/image/rhel7.0-222.qcow2,if=none,id=drive-sata38-0-0,format=raw,cache=none 
-device ide-hd,bus=sata38.0,drive=drive-sata38-0-0,id=sata38-0-0 -drive 
file=/home/image/rhel7.0-223.qcow2,if=none,id=drive-sata38-0-1,format=raw,cache=none 
-device ide-hd,bus=sata38.1,drive=drive-sata38-0-1,id=sata38-0-1 -drive 
file=/home/image/rhel7.0-224.qcow2,if=none,id=drive-sata38-0-2,format=raw,cache=none 
-device ide-hd,bus=sata38.2,drive=drive-sata38-0-2,id=sata38-0-2 -drive 
file=/home/image/rhel7.0-225.qcow2,if=none,id=drive-sata38-0-3,format=raw,cache=none 
-device ide-hd,bus=sata38.3,drive=drive-sata38-0-3,id=sata38-0-3 -drive 
file=/home/image/rhel7.0-226.qcow2,if=none,id=drive-sata38-0-4,format=raw,cache=none 
-device ide-hd,bus=sata38.4,drive=drive-sata38-0-4,id=sata38-0-4 -drive 
file=/home/image/rhel7.0-227.qcow2,if=none,id=drive-sata38-0-5,format=raw,cache=none 
-device ide-hd,bus=sata38.5,drive=drive-sata38-0-5,id=sata38-0-5 -drive 
file=/home/image/rhel7.0-228.qcow2,if=none,id=drive-sata39-0-0,format=raw,cache=none 
-device ide-hd,bus=sata39.0,drive=drive-sata39-0-0,id=sata39-0-0 -drive 
file=/home/image/rhel7.0-229.qcow2,if=none,id=drive-sata39-0-1,format=raw,cache=none 
-device ide-hd,bus=sata39.1,drive=drive-sata39-0-1,id=sata39-0-1 -drive 
file=/home/image/rhel7.0-230.qcow2,if=none,id=drive-sata39-0-2,format=raw,cache=none 
-device ide-hd,bus=sata39.2,drive=drive-sata39-0-2,id=sata39-0-2 -drive 
file=/home/image/rhel7.0-231.qcow2,if=none,id=drive-sata39-0-3,format=raw,cache=none 
-device ide-hd,bus=sata39.3,drive=drive-sata39-0-3,id=sata39-0-3 -drive 
file=/home/image/rhel7.0-232.qcow2,if=none,id=drive-sata39-0-4,format=raw,cache=none 
-device ide-hd,bus=sata39.4,drive=drive-sata39-0-4,id=sata39-0-4 -drive 
file=/home/image/rhel7.0-233.qcow2,if=none,id=drive-sata39-0-5,format=raw,cache=none 
-device ide-hd,bus=sata39.5,drive=drive-sata39-0-5,id=sata39-0-5 -drive 
file=/home/image/rhel7.0-234.qcow2,if=none,id=drive-sata40-0-0,format=raw,cache=none 
-device ide-hd,bus=sata40.0,drive=drive-sata40-0-0,id=sata40-0-0 -drive 
file=/home/image/rhel7.0-235.qcow2,if=none,id=drive-sata40-0-1,format=raw,cache=none 
-device ide-hd,bus=sata40.1,drive=drive-sata40-0-1,id=sata40-0-1 -drive 
file=/home/image/rhel7.0-236.qcow2,if=none,id=drive-sata40-0-2,format=raw,cache=none 
-device ide-hd,bus=sata40.2,drive=drive-sata40-0-2,id=sata40-0-2 -drive 
file=/home/image/rhel7.0-237.qcow2,if=none,id=drive-sata40-0-3,format=raw,cache=none 
-device ide-hd,bus=sata40.3,drive=drive-sata40-0-3,id=sata40-0-3 -drive 
file=/home/image/rhel7.0-238.qcow2,if=none,id=drive-sata40-0-4,format=raw,cache=none 
-device ide-hd,bus=sata40.4,drive=drive-sata40-0-4,id=sata40-0-4 -drive 
file=/home/image/rhel7.0-239.qcow2,if=none,id=drive-sata40-0-5,format=raw,cache=none 
-device ide-hd,bus=sata40.5,drive=drive-sata40-0-5,id=sata40-0-5 -drive 
file=/home/image/rhel7.0-240.qcow2,if=none,id=drive-sata41-0-0,format=raw,cache=none 
-device ide-hd,bus=sata41.0,drive=drive-sata41-0-0,id=sata41-0-0 -drive 
file=/home/image/rhel7.0-241.qcow2,if=none,id=drive-sata41-0-1,format=raw,cache=none 
-device ide-hd,bus=sata41.1,drive=drive-sata41-0-1,id=sata41-0-1 -drive 
file=/home/image/rhel7.0-242.qcow2,if=none,id=drive-sata41-0-2,format=raw,cache=none 
-device ide-hd,bus=sata41.2,drive=drive-sata41-0-2,id=sata41-0-2 -drive 
file=/home/image/rhel7.0-243.qcow2,if=none,id=drive-sata41-0-3,format=raw,cache=none 
-device ide-hd,bus=sata41.3,drive=drive-sata41-0-3,id=sata41-0-3 -drive 
file=/home/image/rhel7.0-244.qcow2,if=none,id=drive-sata41-0-4,format=raw,cache=none 
-device ide-hd,bus=sata41.4,drive=drive-sata41-0-4,id=sata41-0-4 -drive 
file=/home/image/rhel7.0-245.qcow2,if=none,id=drive-sata41-0-5,format=raw,cache=none 
-device ide-hd,bus=sata41.5,drive=drive-sata41-0-5,id=sata41-0-5 -drive 
file=/home/image/rhel7.0-246.qcow2,if=none,id=drive-sata42-0-0,format=raw,cache=none 
-device ide-hd,bus=sata42.0,drive=drive-sata42-0-0,id=sata42-0-0 -drive 
file=/home/image/rhel7.0-247.qcow2,if=none,id=drive-sata42-0-1,format=raw,cache=none 
-device ide-hd,bus=sata42.1,drive=drive-sata42-0-1,id=sata42-0-1 -drive 
file=/home/image/rhel7.0-248.qcow2,if=none,id=drive-sata42-0-2,format=raw,cache=none 
-device ide-hd,bus=sata42.2,drive=drive-sata42-0-2,id=sata42-0-2 -drive 
file=/home/image/rhel7.0-249.qcow2,if=none,id=drive-sata42-0-3,format=raw,cache=none 
-device ide-hd,bus=sata42.3,drive=drive-sata42-0-3,id=sata42-0-3 -drive 
file=/home/image/rhel7.0-250.qcow2,if=none,id=drive-sata42-0-4,format=raw,cache=none 
-device ide-hd,bus=sata42.4,drive=drive-sata42-0-4,id=sata42-0-4 -drive 
file=/home/image/rhel7.0-251.qcow2,if=none,id=drive-sata42-0-5,format=raw,cache=none 
-device ide-hd,bus=sata42.5,drive=drive-sata42-0-5,id=sata42-0-5 -drive 
file=/home/image/rhel7.0-252.qcow2,if=none,id=drive-sata43-0-0,format=raw,cache=none 
-device ide-hd,bus=sata43.0,drive=drive-sata43-0-0,id=sata43-0-0 -drive 
file=/home/image/rhel7.0-253.qcow2,if=none,id=drive-sata43-0-1,format=raw,cache=none 
-device ide-hd,bus=sata43.1,drive=drive-sata43-0-1,id=sata43-0-1 -drive 
file=/home/image/rhel7.0-254.qcow2,if=none,id=drive-sata43-0-2,format=raw,cache=none 
-device ide-hd,bus=sata43.2,drive=drive-sata43-0-2,id=sata43-0-2 -drive 
file=/home/image/rhel7.0-255.qcow2,if=none,id=drive-sata43-0-3,format=raw,cache=none 
-device ide-hd,bus=sata43.3,drive=drive-sata43-0-3,id=sata43-0-3 -drive 
file=/home/image/rhel7.0-256.qcow2,if=none,id=drive-sata43-0-4,format=raw,cache=none 
-device ide-hd,bus=sata43.4,drive=drive-sata43-0-4,id=sata43-0-4 -drive 
file=/home/image/rhel7.0-257.qcow2,if=none,id=drive-sata43-0-5,format=raw,cache=none 
-device ide-hd,bus=sata43.5,drive=drive-sata43-0-5,id=sata43-0-5 -drive 
file=/home/image/rhel7.0-258.qcow2,if=none,id=drive-sata44-0-0,format=raw,cache=none 
-device ide-hd,bus=sata44.0,drive=drive-sata44-0-0,id=sata44-0-0 -drive 
file=/home/image/rhel7.0-259.qcow2,if=none,id=drive-sata44-0-1,format=raw,cache=none 
-device ide-hd,bus=sata44.1,drive=drive-sata44-0-1,id=sata44-0-1 -drive 
file=/home/image/rhel7.0-260.qcow2,if=none,id=drive-sata44-0-2,format=raw,cache=none 
-device ide-hd,bus=sata44.2,drive=drive-sata44-0-2,id=sata44-0-2 -drive 
file=/home/image/rhel7.0-261.qcow2,if=none,id=drive-sata44-0-3,format=raw,cache=none 
-device ide-hd,bus=sata44.3,drive=drive-sata44-0-3,id=sata44-0-3 -drive 
file=/home/image/rhel7.0-262.qcow2,if=none,id=drive-sata44-0-4,format=raw,cache=none 
-device ide-hd,bus=sata44.4,drive=drive-sata44-0-4,id=sata44-0-4 -drive 
file=/home/image/rhel7.0-263.qcow2,if=none,id=drive-sata44-0-5,format=raw,cache=none 
-device ide-hd,bus=sata44.5,drive=drive-sata44-0-5,id=sata44-0-5 -drive 
file=/home/image/rhel7.0-264.qcow2,if=none,id=drive-sata45-0-0,format=raw,cache=none 
-device ide-hd,bus=sata45.0,drive=drive-sata45-0-0,id=sata45-0-0 -drive 
file=/home/image/rhel7.0-265.qcow2,if=none,id=drive-sata45-0-1,format=raw,cache=none 
-device ide-hd,bus=sata45.1,drive=drive-sata45-0-1,id=sata45-0-1 -drive 
file=/home/image/rhel7.0-266.qcow2,if=none,id=drive-sata45-0-2,format=raw,cache=none 
-device ide-hd,bus=sata45.2,drive=drive-sata45-0-2,id=sata45-0-2 -drive 
file=/home/image/rhel7.0-267.qcow2,if=none,id=drive-sata45-0-3,format=raw,cache=none 
-device ide-hd,bus=sata45.3,drive=drive-sata45-0-3,id=sata45-0-3 -drive 
file=/home/image/rhel7.0-268.qcow2,if=none,id=drive-sata45-0-4,format=raw,cache=none 
-device ide-hd,bus=sata45.4,drive=drive-sata45-0-4,id=sata45-0-4 -drive 
file=/home/image/rhel7.0-269.qcow2,if=none,id=drive-sata45-0-5,format=raw,cache=none 
-device ide-hd,bus=sata45.5,drive=drive-sata45-0-5,id=sata45-0-5 -drive 
file=/home/image/rhel7.0-270.qcow2,if=none,id=drive-sata46-0-0,format=raw,cache=none 
-device ide-hd,bus=sata46.0,drive=drive-sata46-0-0,id=sata46-0-0 -drive 
file=/home/image/rhel7.0-271.qcow2,if=none,id=drive-sata46-0-1,format=raw,cache=none 
-device ide-hd,bus=sata46.1,drive=drive-sata46-0-1,id=sata46-0-1 -drive 
file=/home/image/rhel7.0-272.qcow2,if=none,id=drive-sata46-0-2,format=raw,cache=none 
-device ide-hd,bus=sata46.2,drive=drive-sata46-0-2,id=sata46-0-2 -drive 
file=/home/image/rhel7.0-273.qcow2,if=none,id=drive-sata46-0-3,format=raw,cache=none 
-device ide-hd,bus=sata46.3,drive=drive-sata46-0-3,id=sata46-0-3 -drive 
file=/home/image/rhel7.0-274.qcow2,if=none,id=drive-sata46-0-4,format=raw,cache=none 
-device ide-hd,bus=sata46.4,drive=drive-sata46-0-4,id=sata46-0-4 -drive 
file=/home/image/rhel7.0-275.qcow2,if=none,id=drive-sata46-0-5,format=raw,cache=none 
-device ide-hd,bus=sata46.5,drive=drive-sata46-0-5,id=sata46-0-5 -drive 
file=/home/image/rhel7.0-276.qcow2,if=none,id=drive-sata47-0-0,format=raw,cache=none 
-device ide-hd,bus=sata47.0,drive=drive-sata47-0-0,id=sata47-0-0 -drive 
file=/home/image/rhel7.0-277.qcow2,if=none,id=drive-sata47-0-1,format=raw,cache=none 
-device ide-hd,bus=sata47.1,drive=drive-sata47-0-1,id=sata47-0-1 -drive 
file=/home/image/rhel7.0-278.qcow2,if=none,id=drive-sata47-0-2,format=raw,cache=none 
-device ide-hd,bus=sata47.2,drive=drive-sata47-0-2,id=sata47-0-2 -drive 
file=/home/image/rhel7.0-279.qcow2,if=none,id=drive-sata47-0-3,format=raw,cache=none 
-device ide-hd,bus=sata47.3,drive=drive-sata47-0-3,id=sata47-0-3 -drive 
file=/home/image/rhel7.0-280.qcow2,if=none,id=drive-sata47-0-4,format=raw,cache=none 
-device ide-hd,bus=sata47.4,drive=drive-sata47-0-4,id=sata47-0-4 -drive 
file=/home/image/rhel7.0-281.qcow2,if=none,id=drive-sata47-0-5,format=raw,cache=none 
-device ide-hd,bus=sata47.5,drive=drive-sata47-0-5,id=sata47-0-5 -drive 
file=/home/image/rhel7.0-282.qcow2,if=none,id=drive-sata48-0-0,format=raw,cache=none 
-device ide-hd,bus=sata48.0,drive=drive-sata48-0-0,id=sata48-0-0 -drive 
file=/home/image/rhel7.0-283.qcow2,if=none,id=drive-sata48-0-1,format=raw,cache=none 
-device ide-hd,bus=sata48.1,drive=drive-sata48-0-1,id=sata48-0-1 -drive 
file=/home/image/rhel7.0-284.qcow2,if=none,id=drive-sata48-0-2,format=raw,cache=none 
-device ide-hd,bus=sata48.2,drive=drive-sata48-0-2,id=sata48-0-2 -drive 
file=/home/image/rhel7.0-285.qcow2,if=none,id=drive-sata48-0-3,format=raw,cache=none 
-device ide-hd,bus=sata48.3,drive=drive-sata48-0-3,id=sata48-0-3 -drive 
file=/home/image/rhel7.0-286.qcow2,if=none,id=drive-sata48-0-4,format=raw,cache=none 
-device ide-hd,bus=sata48.4,drive=drive-sata48-0-4,id=sata48-0-4 -drive 
file=/home/image/rhel7.0-287.qcow2,if=none,id=drive-sata48-0-5,format=raw,cache=none 
-device ide-hd,bus=sata48.5,drive=drive-sata48-0-5,id=sata48-0-5 -drive 
file=/home/image/rhel7.0-288.qcow2,if=none,id=drive-sata49-0-0,format=raw,cache=none 
-device ide-hd,bus=sata49.0,drive=drive-sata49-0-0,id=sata49-0-0 -drive 
file=/home/image/rhel7.0-289.qcow2,if=none,id=drive-sata49-0-1,format=raw,cache=none 
-device ide-hd,bus=sata49.1,drive=drive-sata49-0-1,id=sata49-0-1 -drive 
file=/home/image/rhel7.0-290.qcow2,if=none,id=drive-sata49-0-2,format=raw,cache=none 
-device ide-hd,bus=sata49.2,drive=drive-sata49-0-2,id=sata49-0-2 -drive 
file=/home/image/rhel7.0-291.qcow2,if=none,id=drive-sata49-0-3,format=raw,cache=none 
-device ide-hd,bus=sata49.3,drive=drive-sata49-0-3,id=sata49-0-3 -drive 
file=/home/image/rhel7.0-292.qcow2,if=none,id=drive-sata49-0-4,format=raw,cache=none 
-device ide-hd,bus=sata49.4,drive=drive-sata49-0-4,id=sata49-0-4 -drive 
file=/home/image/rhel7.0-293.qcow2,if=none,id=drive-sata49-0-5,format=raw,cache=none 
-device ide-hd,bus=sata49.5,drive=drive-sata49-0-5,id=sata49-0-5 -drive 
file=/home/image/rhel7.0-294.qcow2,if=none,id=drive-sata50-0-0,format=raw,cache=none 
-device ide-hd,bus=sata50.0,drive=drive-sata50-0-0,id=sata50-0-0 -drive 
file=/home/image/rhel7.0-295.qcow2,if=none,id=drive-sata50-0-1,format=raw,cache=none 
-device ide-hd,bus=sata50.1,drive=drive-sata50-0-1,id=sata50-0-1 -drive 
file=/home/image/rhel7.0-296.qcow2,if=none,id=drive-sata50-0-2,format=raw,cache=none 
-device ide-hd,bus=sata50.2,drive=drive-sata50-0-2,id=sata50-0-2 -drive 
file=/home/image/rhel7.0-297.qcow2,if=none,id=drive-sata50-0-3,format=raw,cache=none 
-device ide-hd,bus=sata50.3,drive=drive-sata50-0-3,id=sata50-0-3 -drive 
file=/home/image/rhel7.0-298.qcow2,if=none,id=drive-sata50-0-4,format=raw,cache=none 
-device ide-hd,bus=sata50.4,drive=drive-sata50-0-4,id=sata50-0-4 -drive 
file=/home/image/rhel7.0-299.qcow2,if=none,id=drive-sata50-0-5,format=raw,cache=none 
-device ide-hd,bus=sata50.5,drive=drive-sata50-0-5,id=sata50-0-5 -drive 
file=/home/image/rhel7.0-300.qcow2,if=none,id=drive-sata51-0-0,format=raw,cache=none 
-device ide-hd,bus=sata51.0,drive=drive-sata51-0-0,id=sata51-0-0 -drive 
file=/home/image/rhel7.0-301.qcow2,if=none,id=drive-sata51-0-1,format=raw,cache=none 
-device ide-hd,bus=sata51.1,drive=drive-sata51-0-1,id=sata51-0-1 -drive 
file=/home/image/rhel7.0-302.qcow2,if=none,id=drive-sata51-0-2,format=raw,cache=none 
-device ide-hd,bus=sata51.2,drive=drive-sata51-0-2,id=sata51-0-2 -drive 
file=/home/image/rhel7.0-303.qcow2,if=none,id=drive-sata51-0-3,format=raw,cache=none 
-device ide-hd,bus=sata51.3,drive=drive-sata51-0-3,id=sata51-0-3 -drive 
file=/home/image/rhel7.0-304.qcow2,if=none,id=drive-sata51-0-4,format=raw,cache=none 
-device ide-hd,bus=sata51.4,drive=drive-sata51-0-4,id=sata51-0-4 -drive 
file=/home/image/rhel7.0-305.qcow2,if=none,id=drive-sata51-0-5,format=raw,cache=none 
-device ide-hd,bus=sata51.5,drive=drive-sata51-0-5,id=sata51-0-5 -drive 
file=/home/image/rhel7.0-306.qcow2,if=none,id=drive-sata52-0-0,format=raw,cache=none 
-device ide-hd,bus=sata52.0,drive=drive-sata52-0-0,id=sata52-0-0 -drive 
file=/home/image/rhel7.0-307.qcow2,if=none,id=drive-sata52-0-1,format=raw,cache=none 
-device ide-hd,bus=sata52.1,drive=drive-sata52-0-1,id=sata52-0-1 -drive 
file=/home/image/rhel7.0-308.qcow2,if=none,id=drive-sata52-0-2,format=raw,cache=none 
-device ide-hd,bus=sata52.2,drive=drive-sata52-0-2,id=sata52-0-2 -drive 
file=/home/image/rhel7.0-309.qcow2,if=none,id=drive-sata52-0-3,format=raw,cache=none 
-device ide-hd,bus=sata52.3,drive=drive-sata52-0-3,id=sata52-0-3 -drive 
file=/home/image/rhel7.0-310.qcow2,if=none,id=drive-sata52-0-4,format=raw,cache=none 
-device ide-hd,bus=sata52.4,drive=drive-sata52-0-4,id=sata52-0-4 -drive 
file=/home/image/rhel7.0-311.qcow2,if=none,id=drive-sata52-0-5,format=raw,cache=none 
-device ide-hd,bus=sata52.5,drive=drive-sata52-0-5,id=sata52-0-5 -drive 
file=/home/image/rhel7.0-312.qcow2,if=none,id=drive-sata53-0-0,format=raw,cache=none 
-device ide-hd,bus=sata53.0,drive=drive-sata53-0-0,id=sata53-0-0 -drive 
file=/home/image/rhel7.0-313.qcow2,if=none,id=drive-sata53-0-1,format=raw,cache=none 
-device ide-hd,bus=sata53.1,drive=drive-sata53-0-1,id=sata53-0-1 -drive 
file=/home/image/rhel7.0-314.qcow2,if=none,id=drive-sata53-0-2,format=raw,cache=none 
-device ide-hd,bus=sata53.2,drive=drive-sata53-0-2,id=sata53-0-2 -drive 
file=/home/image/rhel7.0-315.qcow2,if=none,id=drive-sata53-0-3,format=raw,cache=none 
-device ide-hd,bus=sata53.3,drive=drive-sata53-0-3,id=sata53-0-3 -drive 
file=/home/image/rhel7.0-316.qcow2,if=none,id=drive-sata53-0-4,format=raw,cache=none 
-device ide-hd,bus=sata53.4,drive=drive-sata53-0-4,id=sata53-0-4 -drive 
file=/home/image/rhel7.0-317.qcow2,if=none,id=drive-sata53-0-5,format=raw,cache=none 
-device ide-hd,bus=sata53.5,drive=drive-sata53-0-5,id=sata53-0-5 -drive 
file=/home/image/rhel7.0-318.qcow2,if=none,id=drive-sata54-0-0,format=raw,cache=none 
-device ide-hd,bus=sata54.0,drive=drive-sata54-0-0,id=sata54-0-0 -drive 
file=/home/image/rhel7.0-319.qcow2,if=none,id=drive-sata54-0-1,format=raw,cache=none 
-device ide-hd,bus=sata54.1,drive=drive-sata54-0-1,id=sata54-0-1 -drive 
file=/home/image/rhel7.0-320.qcow2,if=none,id=drive-sata54-0-2,format=raw,cache=none 
-device ide-hd,bus=sata54.2,drive=drive-sata54-0-2,id=sata54-0-2 -drive 
file=/home/image/rhel7.0-321.qcow2,if=none,id=drive-sata54-0-3,format=raw,cache=none 
-device ide-hd,bus=sata54.3,drive=drive-sata54-0-3,id=sata54-0-3 -drive 
file=/home/image/rhel7.0-322.qcow2,if=none,id=drive-sata54-0-4,format=raw,cache=none 
-device ide-hd,bus=sata54.4,drive=drive-sata54-0-4,id=sata54-0-4 -drive 
file=/home/image/rhel7.0-323.qcow2,if=none,id=drive-sata54-0-5,format=raw,cache=none 
-device ide-hd,bus=sata54.5,drive=drive-sata54-0-5,id=sata54-0-5 -drive 
file=/home/image/rhel7.0-324.qcow2,if=none,id=drive-sata55-0-0,format=raw,cache=none 
-device ide-hd,bus=sata55.0,drive=drive-sata55-0-0,id=sata55-0-0 -drive 
file=/home/image/rhel7.0-325.qcow2,if=none,id=drive-sata55-0-1,format=raw,cache=none 
-device ide-hd,bus=sata55.1,drive=drive-sata55-0-1,id=sata55-0-1 -drive 
file=/home/image/rhel7.0-326.qcow2,if=none,id=drive-sata55-0-2,format=raw,cache=none 
-device ide-hd,bus=sata55.2,drive=drive-sata55-0-2,id=sata55-0-2 -drive 
file=/home/image/rhel7.0-327.qcow2,if=none,id=drive-sata55-0-3,format=raw,cache=none 
-device ide-hd,bus=sata55.3,drive=drive-sata55-0-3,id=sata55-0-3 -drive 
file=/home/image/rhel7.0-328.qcow2,if=none,id=drive-sata55-0-4,format=raw,cache=none 
-device ide-hd,bus=sata55.4,drive=drive-sata55-0-4,id=sata55-0-4 -drive 
file=/home/image/rhel7.0-329.qcow2,if=none,id=drive-sata55-0-5,format=raw,cache=none 
-device ide-hd,bus=sata55.5,drive=drive-sata55-0-5,id=sata55-0-5 -drive 
file=/home/image/rhel7.0-330.qcow2,if=none,id=drive-sata56-0-0,format=raw,cache=none 
-device ide-hd,bus=sata56.0,drive=drive-sata56-0-0,id=sata56-0-0 -drive 
file=/home/image/rhel7.0-331.qcow2,if=none,id=drive-sata56-0-1,format=raw,cache=none 
-device ide-hd,bus=sata56.1,drive=drive-sata56-0-1,id=sata56-0-1 -drive 
file=/home/image/rhel7.0-332.qcow2,if=none,id=drive-sata56-0-2,format=raw,cache=none 
-device ide-hd,bus=sata56.2,drive=drive-sata56-0-2,id=sata56-0-2 -drive 
file=/home/image/rhel7.0-333.qcow2,if=none,id=drive-sata56-0-3,format=raw,cache=none 
-device ide-hd,bus=sata56.3,drive=drive-sata56-0-3,id=sata56-0-3 -drive 
file=/home/image/rhel7.0-334.qcow2,if=none,id=drive-sata56-0-4,format=raw,cache=none 
-device ide-hd,bus=sata56.4,drive=drive-sata56-0-4,id=sata56-0-4 -drive 
file=/home/image/rhel7.0-335.qcow2,if=none,id=drive-sata56-0-5,format=raw,cache=none 
-device ide-hd,bus=sata56.5,drive=drive-sata56-0-5,id=sata56-0-5 -drive 
file=/home/image/rhel7.0-336.qcow2,if=none,id=drive-sata57-0-0,format=raw,cache=none 
-device ide-hd,bus=sata57.0,drive=drive-sata57-0-0,id=sata57-0-0 -drive 
file=/home/image/rhel7.0-337.qcow2,if=none,id=drive-sata57-0-1,format=raw,cache=none 
-device ide-hd,bus=sata57.1,drive=drive-sata57-0-1,id=sata57-0-1 -drive 
file=/home/image/rhel7.0-338.qcow2,if=none,id=drive-sata57-0-2,format=raw,cache=none 
-device ide-hd,bus=sata57.2,drive=drive-sata57-0-2,id=sata57-0-2 -drive 
file=/home/image/rhel7.0-339.qcow2,if=none,id=drive-sata57-0-3,format=raw,cache=none 
-device ide-hd,bus=sata57.3,drive=drive-sata57-0-3,id=sata57-0-3 -drive 
file=/home/image/rhel7.0-340.qcow2,if=none,id=drive-sata57-0-4,format=raw,cache=none 
-device ide-hd,bus=sata57.4,drive=drive-sata57-0-4,id=sata57-0-4 -drive 
file=/home/image/rhel7.0-341.qcow2,if=none,id=drive-sata57-0-5,format=raw,cache=none 
-device ide-hd,bus=sata57.5,drive=drive-sata57-0-5,id=sata57-0-5 -drive 
file=/home/image/rhel7.0-342.qcow2,if=none,id=drive-sata58-0-0,format=raw,cache=none 
-device ide-hd,bus=sata58.0,drive=drive-sata58-0-0,id=sata58-0-0 -drive 
file=/home/image/rhel7.0-343.qcow2,if=none,id=drive-sata58-0-1,format=raw,cache=none 
-device ide-hd,bus=sata58.1,drive=drive-sata58-0-1,id=sata58-0-1 -drive 
file=/home/image/rhel7.0-344.qcow2,if=none,id=drive-sata58-0-2,format=raw,cache=none 
-device ide-hd,bus=sata58.2,drive=drive-sata58-0-2,id=sata58-0-2 -drive 
file=/home/image/rhel7.0-345.qcow2,if=none,id=drive-sata58-0-3,format=raw,cache=none 
-device ide-hd,bus=sata58.3,drive=drive-sata58-0-3,id=sata58-0-3 -drive 
file=/home/image/rhel7.0-346.qcow2,if=none,id=drive-sata58-0-4,format=raw,cache=none 
-device ide-hd,bus=sata58.4,drive=drive-sata58-0-4,id=sata58-0-4 -drive 
file=/home/image/rhel7.0-347.qcow2,if=none,id=drive-sata58-0-5,format=raw,cache=none 
-device ide-hd,bus=sata58.5,drive=drive-sata58-0-5,id=sata58-0-5 -drive 
file=/home/image/rhel7.0-348.qcow2,if=none,id=drive-sata59-0-0,format=raw,cache=none 
-device ide-hd,bus=sata59.0,drive=drive-sata59-0-0,id=sata59-0-0 -drive 
file=/home/image/rhel7.0-349.qcow2,if=none,id=drive-sata59-0-1,format=raw,cache=none 
-device ide-hd,bus=sata59.1,drive=drive-sata59-0-1,id=sata59-0-1 -drive 
file=/home/image/rhel7.0-350.qcow2,if=none,id=drive-sata59-0-2,format=raw,cache=none 
-device ide-hd,bus=sata59.2,drive=drive-sata59-0-2,id=sata59-0-2 -drive 
file=/home/image/rhel7.0-351.qcow2,if=none,id=drive-sata59-0-3,format=raw,cache=none 
-device ide-hd,bus=sata59.3,drive=drive-sata59-0-3,id=sata59-0-3 -drive 
file=/home/image/rhel7.0-352.qcow2,if=none,id=drive-sata59-0-4,format=raw,cache=none 
-device ide-hd,bus=sata59.4,drive=drive-sata59-0-4,id=sata59-0-4 -drive 
file=/home/image/rhel7.0-353.qcow2,if=none,id=drive-sata59-0-5,format=raw,cache=none 
-device ide-hd,bus=sata59.5,drive=drive-sata59-0-5,id=sata59-0-5 -drive 
file=/home/image/rhel7.0-354.qcow2,if=none,id=drive-sata60-0-0,format=raw,cache=none 
-device ide-hd,bus=sata60.0,drive=drive-sata60-0-0,id=sata60-0-0 -drive 
file=/home/image/rhel7.0-355.qcow2,if=none,id=drive-sata60-0-1,format=raw,cache=none 
-device ide-hd,bus=sata60.1,drive=drive-sata60-0-1,id=sata60-0-1 -drive 
file=/home/image/rhel7.0-356.qcow2,if=none,id=drive-sata60-0-2,format=raw,cache=none 
-device ide-hd,bus=sata60.2,drive=drive-sata60-0-2,id=sata60-0-2 -drive 
file=/home/image/rhel7.0-357.qcow2,if=none,id=drive-sata60-0-3,format=raw,cache=none 
-device ide-hd,bus=sata60.3,drive=drive-sata60-0-3,id=sata60-0-3 -drive 
file=/home/image/rhel7.0-358.qcow2,if=none,id=drive-sata60-0-4,format=raw,cache=none 
-device ide-hd,bus=sata60.4,drive=drive-sata60-0-4,id=sata60-0-4 -drive 
file=/home/image/rhel7.0-359.qcow2,if=none,id=drive-sata60-0-5,format=raw,cache=none 
-device ide-hd,bus=sata60.5,drive=drive-sata60-0-5,id=sata60-0-5 -drive 
file=/home/image/rhel7.0-360.qcow2,if=none,id=drive-sata61-0-0,format=raw,cache=none 
-device ide-hd,bus=sata61.0,drive=drive-sata61-0-0,id=sata61-0-0 -drive 
file=/home/image/rhel7.0-361.qcow2,if=none,id=drive-sata61-0-1,format=raw,cache=none 
-device ide-hd,bus=sata61.1,drive=drive-sata61-0-1,id=sata61-0-1 -drive 
file=/home/image/rhel7.0-362.qcow2,if=none,id=drive-sata61-0-2,format=raw,cache=none 
-device ide-hd,bus=sata61.2,drive=drive-sata61-0-2,id=sata61-0-2 -drive 
file=/home/image/rhel7.0-363.qcow2,if=none,id=drive-sata61-0-3,format=raw,cache=none 
-device ide-hd,bus=sata61.3,drive=drive-sata61-0-3,id=sata61-0-3 -drive 
file=/home/image/rhel7.0-364.qcow2,if=none,id=drive-sata61-0-4,format=raw,cache=none 
-device ide-hd,bus=sata61.4,drive=drive-sata61-0-4,id=sata61-0-4 -drive 
file=/home/image/rhel7.0-365.qcow2,if=none,id=drive-sata61-0-5,format=raw,cache=none 
-device ide-hd,bus=sata61.5,drive=drive-sata61-0-5,id=sata61-0-5 -drive 
file=/home/image/rhel7.0-366.qcow2,if=none,id=drive-sata62-0-0,format=raw,cache=none 
-device ide-hd,bus=sata62.0,drive=drive-sata62-0-0,id=sata62-0-0 -drive 
file=/home/image/rhel7.0-367.qcow2,if=none,id=drive-sata62-0-1,format=raw,cache=none 
-device ide-hd,bus=sata62.1,drive=drive-sata62-0-1,id=sata62-0-1 -drive 
file=/home/image/rhel7.0-368.qcow2,if=none,id=drive-sata62-0-2,format=raw,cache=none 
-device ide-hd,bus=sata62.2,drive=drive-sata62-0-2,id=sata62-0-2 -drive 
file=/home/image/rhel7.0-369.qcow2,if=none,id=drive-sata62-0-3,format=raw,cache=none 
-device ide-hd,bus=sata62.3,drive=drive-sata62-0-3,id=sata62-0-3 -drive 
file=/home/image/rhel7.0-370.qcow2,if=none,id=drive-sata62-0-4,format=raw,cache=none 
-device ide-hd,bus=sata62.4,drive=drive-sata62-0-4,id=sata62-0-4 -drive 
file=/home/image/rhel7.0-371.qcow2,if=none,id=drive-sata62-0-5,format=raw,cache=none 
-device ide-hd,bus=sata62.5,drive=drive-sata62-0-5,id=sata62-0-5 -drive 
file=/home/image/rhel7.0-372.qcow2,if=none,id=drive-sata63-0-0,format=raw,cache=none 
-device ide-hd,bus=sata63.0,drive=drive-sata63-0-0,id=sata63-0-0 -drive 
file=/home/image/rhel7.0-373.qcow2,if=none,id=drive-sata63-0-1,format=raw,cache=none 
-device ide-hd,bus=sata63.1,drive=drive-sata63-0-1,id=sata63-0-1 -drive 
file=/home/image/rhel7.0-374.qcow2,if=none,id=drive-sata63-0-2,format=raw,cache=none 
-device ide-hd,bus=sata63.2,drive=drive-sata63-0-2,id=sata63-0-2 -drive 
file=/home/image/rhel7.0-375.qcow2,if=none,id=drive-sata63-0-3,format=raw,cache=none 
-device ide-hd,bus=sata63.3,drive=drive-sata63-0-3,id=sata63-0-3 -drive 
file=/home/image/rhel7.0-376.qcow2,if=none,id=drive-sata63-0-4,format=raw,cache=none 
-device ide-hd,bus=sata63.4,drive=drive-sata63-0-4,id=sata63-0-4 -drive 
file=/home/image/rhel7.0-377.qcow2,if=none,id=drive-sata63-0-5,format=raw,cache=none 
-device ide-hd,bus=sata63.5,drive=drive-sata63-0-5,id=sata63-0-5 -drive 
file=/home/image/rhel7.0-378.qcow2,if=none,id=drive-sata64-0-0,format=raw,cache=none 
-device ide-hd,bus=sata64.0,drive=drive-sata64-0-0,id=sata64-0-0 -drive 
file=/home/image/rhel7.0-379.qcow2,if=none,id=drive-sata64-0-1,format=raw,cache=none 
-device ide-hd,bus=sata64.1,drive=drive-sata64-0-1,id=sata64-0-1 -drive 
file=/home/image/rhel7.0-380.qcow2,if=none,id=drive-sata64-0-2,format=raw,cache=none 
-device ide-hd,bus=sata64.2,drive=drive-sata64-0-2,id=sata64-0-2 -drive 
file=/home/image/rhel7.0-381.qcow2,if=none,id=drive-sata64-0-3,format=raw,cache=none 
-device ide-hd,bus=sata64.3,drive=drive-sata64-0-3,id=sata64-0-3 -drive 
file=/home/image/rhel7.0-382.qcow2,if=none,id=drive-sata64-0-4,format=raw,cache=none 
-device ide-hd,bus=sata64.4,drive=drive-sata64-0-4,id=sata64-0-4 -drive 
file=/home/image/rhel7.0-383.qcow2,if=none,id=drive-sata64-0-5,format=raw,cache=none 
-device ide-hd,bus=sata64.5,drive=drive-sata64-0-5,id=sata64-0-5 -drive 
file=/home/image/rhel7.0-384.qcow2,if=none,id=drive-sata65-0-0,format=raw,cache=none 
-device ide-hd,bus=sata65.0,drive=drive-sata65-0-0,id=sata65-0-0 -drive 
file=/home/image/rhel7.0-385.qcow2,if=none,id=drive-sata65-0-1,format=raw,cache=none 
-device ide-hd,bus=sata65.1,drive=drive-sata65-0-1,id=sata65-0-1 -drive 
file=/home/image/rhel7.0-386.qcow2,if=none,id=drive-sata65-0-2,format=raw,cache=none 
-device ide-hd,bus=sata65.2,drive=drive-sata65-0-2,id=sata65-0-2 -drive 
file=/home/image/rhel7.0-387.qcow2,if=none,id=drive-sata65-0-3,format=raw,cache=none 
-device ide-hd,bus=sata65.3,drive=drive-sata65-0-3,id=sata65-0-3 -drive 
file=/home/image/rhel7.0-388.qcow2,if=none,id=drive-sata65-0-4,format=raw,cache=none 
-device ide-hd,bus=sata65.4,drive=drive-sata65-0-4,id=sata65-0-4 -drive 
file=/home/image/rhel7.0-389.qcow2,if=none,id=drive-sata65-0-5,format=raw,cache=none 
-device ide-hd,bus=sata65.5,drive=drive-sata65-0-5,id=sata65-0-5 -drive 
file=/home/image/rhel7.0-390.qcow2,if=none,id=drive-sata66-0-0,format=raw,cache=none 
-device ide-hd,bus=sata66.0,drive=drive-sata66-0-0,id=sata66-0-0 -drive 
file=/home/image/rhel7.0-391.qcow2,if=none,id=drive-sata66-0-1,format=raw,cache=none 
-device ide-hd,bus=sata66.1,drive=drive-sata66-0-1,id=sata66-0-1 -drive 
file=/home/image/rhel7.0-392.qcow2,if=none,id=drive-sata66-0-2,format=raw,cache=none 
-device ide-hd,bus=sata66.2,drive=drive-sata66-0-2,id=sata66-0-2 -drive 
file=/home/image/rhel7.0-393.qcow2,if=none,id=drive-sata66-0-3,format=raw,cache=none 
-device ide-hd,bus=sata66.3,drive=drive-sata66-0-3,id=sata66-0-3 -drive 
file=/home/image/rhel7.0-394.qcow2,if=none,id=drive-sata66-0-4,format=raw,cache=none 
-device ide-hd,bus=sata66.4,drive=drive-sata66-0-4,id=sata66-0-4 -drive 
file=/home/image/rhel7.0-395.qcow2,if=none,id=drive-sata66-0-5,format=raw,cache=none 
-device ide-hd,bus=sata66.5,drive=drive-sata66-0-5,id=sata66-0-5 -drive 
file=/home/image/rhel7.0-396.qcow2,if=none,id=drive-sata67-0-0,format=raw,cache=none 
-device ide-hd,bus=sata67.0,drive=drive-sata67-0-0,id=sata67-0-0 -drive 
file=/home/image/rhel7.0-397.qcow2,if=none,id=drive-sata67-0-1,format=raw,cache=none 
-device ide-hd,bus=sata67.1,drive=drive-sata67-0-1,id=sata67-0-1 -drive 
file=/home/image/rhel7.0-398.qcow2,if=none,id=drive-sata67-0-2,format=raw,cache=none 
-device ide-hd,bus=sata67.2,drive=drive-sata67-0-2,id=sata67-0-2 -drive 
file=/home/image/rhel7.0-399.qcow2,if=none,id=drive-sata67-0-3,format=raw,cache=none 
-device ide-hd,bus=sata67.3,drive=drive-sata67-0-3,id=sata67-0-3 -drive 
file=/home/image/rhel7.0-400.qcow2,if=none,id=drive-sata67-0-4,format=raw,cache=none 
-device ide-hd,bus=sata67.4,drive=drive-sata67-0-4,id=sata67-0-4 -drive 
file=/home/image/rhel7.0-401.qcow2,if=none,id=drive-sata67-0-5,format=raw,cache=none 
-device ide-hd,bus=sata67.5,drive=drive-sata67-0-5,id=sata67-0-5 -drive 
file=/home/image/rhel7.0-402.qcow2,if=none,id=drive-sata68-0-0,format=raw,cache=none 
-device ide-hd,bus=sata68.0,drive=drive-sata68-0-0,id=sata68-0-0 -drive 
file=/home/image/rhel7.0-403.qcow2,if=none,id=drive-sata68-0-1,format=raw,cache=none 
-device ide-hd,bus=sata68.1,drive=drive-sata68-0-1,id=sata68-0-1 -drive 
file=/home/image/rhel7.0-404.qcow2,if=none,id=drive-sata68-0-2,format=raw,cache=none 
-device ide-hd,bus=sata68.2,drive=drive-sata68-0-2,id=sata68-0-2 -drive 
file=/home/image/rhel7.0-405.qcow2,if=none,id=drive-sata68-0-3,format=raw,cache=none 
-device ide-hd,bus=sata68.3,drive=drive-sata68-0-3,id=sata68-0-3 -drive 
file=/home/image/rhel7.0-406.qcow2,if=none,id=drive-sata68-0-4,format=raw,cache=none 
-device ide-hd,bus=sata68.4,drive=drive-sata68-0-4,id=sata68-0-4 -drive 
file=/home/image/rhel7.0-407.qcow2,if=none,id=drive-sata68-0-5,format=raw,cache=none 
-device ide-hd,bus=sata68.5,drive=drive-sata68-0-5,id=sata68-0-5 -drive 
file=/home/image/rhel7.0-408.qcow2,if=none,id=drive-sata69-0-0,format=raw,cache=none 
-device ide-hd,bus=sata69.0,drive=drive-sata69-0-0,id=sata69-0-0 -drive 
file=/home/image/rhel7.0-409.qcow2,if=none,id=drive-sata69-0-1,format=raw,cache=none 
-device ide-hd,bus=sata69.1,drive=drive-sata69-0-1,id=sata69-0-1 -drive 
file=/home/image/rhel7.0-410.qcow2,if=none,id=drive-sata69-0-2,format=raw,cache=none 
-device ide-hd,bus=sata69.2,drive=drive-sata69-0-2,id=sata69-0-2 -drive 
file=/home/image/rhel7.0-411.qcow2,if=none,id=drive-sata69-0-3,format=raw,cache=none 
-device ide-hd,bus=sata69.3,drive=drive-sata69-0-3,id=sata69-0-3 -drive 
file=/home/image/rhel7.0-412.qcow2,if=none,id=drive-sata69-0-4,format=raw,cache=none 
-device ide-hd,bus=sata69.4,drive=drive-sata69-0-4,id=sata69-0-4 -drive 
file=/home/image/rhel7.0-413.qcow2,if=none,id=drive-sata69-0-5,format=raw,cache=none 
-device ide-hd,bus=sata69.5,drive=drive-sata69-0-5,id=sata69-0-5 -drive 
file=/home/image/rhel7.0-414.qcow2,if=none,id=drive-sata70-0-0,format=raw,cache=none 
-device ide-hd,bus=sata70.0,drive=drive-sata70-0-0,id=sata70-0-0 -drive 
file=/home/image/rhel7.0-415.qcow2,if=none,id=drive-sata70-0-1,format=raw,cache=none 
-device ide-hd,bus=sata70.1,drive=drive-sata70-0-1,id=sata70-0-1 -drive 
file=/home/image/rhel7.0-416.qcow2,if=none,id=drive-sata70-0-2,format=raw,cache=none 
-device ide-hd,bus=sata70.2,drive=drive-sata70-0-2,id=sata70-0-2 -drive 
file=/home/image/rhel7.0-417.qcow2,if=none,id=drive-sata70-0-3,format=raw,cache=none 
-device ide-hd,bus=sata70.3,drive=drive-sata70-0-3,id=sata70-0-3 -drive 
file=/home/image/rhel7.0-418.qcow2,if=none,id=drive-sata70-0-4,format=raw,cache=none 
-device ide-hd,bus=sata70.4,drive=drive-sata70-0-4,id=sata70-0-4 -drive 
file=/home/image/rhel7.0-419.qcow2,if=none,id=drive-sata70-0-5,format=raw,cache=none 
-device ide-hd,bus=sata70.5,drive=drive-sata70-0-5,id=sata70-0-5 -drive 
file=/home/image/rhel7.0-420.qcow2,if=none,id=drive-sata71-0-0,format=raw,cache=none 
-device ide-hd,bus=sata71.0,drive=drive-sata71-0-0,id=sata71-0-0 -drive 
file=/home/image/rhel7.0-421.qcow2,if=none,id=drive-sata71-0-1,format=raw,cache=none 
-device ide-hd,bus=sata71.1,drive=drive-sata71-0-1,id=sata71-0-1 -drive 
file=/home/image/rhel7.0-422.qcow2,if=none,id=drive-sata71-0-2,format=raw,cache=none 
-device ide-hd,bus=sata71.2,drive=drive-sata71-0-2,id=sata71-0-2 -drive 
file=/home/image/rhel7.0-423.qcow2,if=none,id=drive-sata71-0-3,format=raw,cache=none 
-device ide-hd,bus=sata71.3,drive=drive-sata71-0-3,id=sata71-0-3 -drive 
file=/home/image/rhel7.0-424.qcow2,if=none,id=drive-sata71-0-4,format=raw,cache=none 
-device ide-hd,bus=sata71.4,drive=drive-sata71-0-4,id=sata71-0-4 -drive 
file=/home/image/rhel7.0-425.qcow2,if=none,id=drive-sata71-0-5,format=raw,cache=none 
-device ide-hd,bus=sata71.5,drive=drive-sata71-0-5,id=sata71-0-5 -drive 
file=/home/image/rhel7.0-426.qcow2,if=none,id=drive-sata72-0-0,format=raw,cache=none 
-device ide-hd,bus=sata72.0,drive=drive-sata72-0-0,id=sata72-0-0 -drive 
file=/home/image/rhel7.0-427.qcow2,if=none,id=drive-sata72-0-1,format=raw,cache=none 
-device ide-hd,bus=sata72.1,drive=drive-sata72-0-1,id=sata72-0-1 -drive 
file=/home/image/rhel7.0-428.qcow2,if=none,id=drive-sata72-0-2,format=raw,cache=none 
-device ide-hd,bus=sata72.2,drive=drive-sata72-0-2,id=sata72-0-2 -drive 
file=/home/image/rhel7.0-429.qcow2,if=none,id=drive-sata72-0-3,format=raw,cache=none 
-device ide-hd,bus=sata72.3,drive=drive-sata72-0-3,id=sata72-0-3 -drive 
file=/home/image/rhel7.0-430.qcow2,if=none,id=drive-sata72-0-4,format=raw,cache=none 
-device ide-hd,bus=sata72.4,drive=drive-sata72-0-4,id=sata72-0-4 -drive 
file=/home/image/rhel7.0-431.qcow2,if=none,id=drive-sata72-0-5,format=raw,cache=none 
-device ide-hd,bus=sata72.5,drive=drive-sata72-0-5,id=sata72-0-5 -drive 
file=/home/image/rhel7.0-432.qcow2,if=none,id=drive-sata73-0-0,format=raw,cache=none 
-device ide-hd,bus=sata73.0,drive=drive-sata73-0-0,id=sata73-0-0 -drive 
file=/home/image/rhel7.0-433.qcow2,if=none,id=drive-sata73-0-1,format=raw,cache=none 
-device ide-hd,bus=sata73.1,drive=drive-sata73-0-1,id=sata73-0-1 -drive 
file=/home/image/rhel7.0-434.qcow2,if=none,id=drive-sata73-0-2,format=raw,cache=none 
-device ide-hd,bus=sata73.2,drive=drive-sata73-0-2,id=sata73-0-2 -drive 
file=/home/image/rhel7.0-435.qcow2,if=none,id=drive-sata73-0-3,format=raw,cache=none 
-device ide-hd,bus=sata73.3,drive=drive-sata73-0-3,id=sata73-0-3 -drive 
file=/home/image/rhel7.0-436.qcow2,if=none,id=drive-sata73-0-4,format=raw,cache=none 
-device ide-hd,bus=sata73.4,drive=drive-sata73-0-4,id=sata73-0-4 -drive 
file=/home/image/rhel7.0-437.qcow2,if=none,id=drive-sata73-0-5,format=raw,cache=none 
-device ide-hd,bus=sata73.5,drive=drive-sata73-0-5,id=sata73-0-5 -drive 
file=/home/image/rhel7.0-438.qcow2,if=none,id=drive-sata74-0-0,format=raw,cache=none 
-device ide-hd,bus=sata74.0,drive=drive-sata74-0-0,id=sata74-0-0 -drive 
file=/home/image/rhel7.0-439.qcow2,if=none,id=drive-sata74-0-1,format=raw,cache=none 
-device ide-hd,bus=sata74.1,drive=drive-sata74-0-1,id=sata74-0-1 -drive 
file=/home/image/rhel7.0-440.qcow2,if=none,id=drive-sata74-0-2,format=raw,cache=none 
-device ide-hd,bus=sata74.2,drive=drive-sata74-0-2,id=sata74-0-2 -drive 
file=/home/image/rhel7.0-441.qcow2,if=none,id=drive-sata74-0-3,format=raw,cache=none 
-device ide-hd,bus=sata74.3,drive=drive-sata74-0-3,id=sata74-0-3 -drive 
file=/home/image/rhel7.0-442.qcow2,if=none,id=drive-sata74-0-4,format=raw,cache=none 
-device ide-hd,bus=sata74.4,drive=drive-sata74-0-4,id=sata74-0-4 -drive 
file=/home/image/rhel7.0-443.qcow2,if=none,id=drive-sata74-0-5,format=raw,cache=none 
-device ide-hd,bus=sata74.5,drive=drive-sata74-0-5,id=sata74-0-5 -drive 
file=/home/image/rhel7.0-444.qcow2,if=none,id=drive-sata75-0-0,format=raw,cache=none 
-device ide-hd,bus=sata75.0,drive=drive-sata75-0-0,id=sata75-0-0 -drive 
file=/home/image/rhel7.0-445.qcow2,if=none,id=drive-sata75-0-1,format=raw,cache=none 
-device ide-hd,bus=sata75.1,drive=drive-sata75-0-1,id=sata75-0-1 -drive 
file=/home/image/rhel7.0-446.qcow2,if=none,id=drive-sata75-0-2,format=raw,cache=none 
-device ide-hd,bus=sata75.2,drive=drive-sata75-0-2,id=sata75-0-2 -drive 
file=/home/image/rhel7.0-447.qcow2,if=none,id=drive-sata75-0-3,format=raw,cache=none 
-device ide-hd,bus=sata75.3,drive=drive-sata75-0-3,id=sata75-0-3 -drive 
file=/home/image/rhel7.0-448.qcow2,if=none,id=drive-sata75-0-4,format=raw,cache=none 
-device ide-hd,bus=sata75.4,drive=drive-sata75-0-4,id=sata75-0-4 -drive 
file=/home/image/rhel7.0-449.qcow2,if=none,id=drive-sata75-0-5,format=raw,cache=none 
-device ide-hd,bus=sata75.5,drive=drive-sata75-0-5,id=sata75-0-5 -drive 
file=/home/image/rhel7.0-450.qcow2,if=none,id=drive-sata76-0-0,format=raw,cache=none 
-device ide-hd,bus=sata76.0,drive=drive-sata76-0-0,id=sata76-0-0 -drive 
file=/home/image/rhel7.0-451.qcow2,if=none,id=drive-sata76-0-1,format=raw,cache=none 
-device ide-hd,bus=sata76.1,drive=drive-sata76-0-1,id=sata76-0-1 -drive 
file=/home/image/rhel7.0-452.qcow2,if=none,id=drive-sata76-0-2,format=raw,cache=none 
-device ide-hd,bus=sata76.2,drive=drive-sata76-0-2,id=sata76-0-2 -drive 
file=/home/image/rhel7.0-453.qcow2,if=none,id=drive-sata76-0-3,format=raw,cache=none 
-device ide-hd,bus=sata76.3,drive=drive-sata76-0-3,id=sata76-0-3 -drive 
file=/home/image/rhel7.0-454.qcow2,if=none,id=drive-sata76-0-4,format=raw,cache=none 
-device ide-hd,bus=sata76.4,drive=drive-sata76-0-4,id=sata76-0-4 -drive 
file=/home/image/rhel7.0-455.qcow2,if=none,id=drive-sata76-0-5,format=raw,cache=none 
-device ide-hd,bus=sata76.5,drive=drive-sata76-0-5,id=sata76-0-5 -drive 
file=/home/image/rhel7.0-456.qcow2,if=none,id=drive-sata77-0-0,format=raw,cache=none 
-device ide-hd,bus=sata77.0,drive=drive-sata77-0-0,id=sata77-0-0 -drive 
file=/home/image/rhel7.0-457.qcow2,if=none,id=drive-sata77-0-1,format=raw,cache=none 
-device ide-hd,bus=sata77.1,drive=drive-sata77-0-1,id=sata77-0-1 -drive 
file=/home/image/rhel7.0-458.qcow2,if=none,id=drive-sata77-0-2,format=raw,cache=none 
-device ide-hd,bus=sata77.2,drive=drive-sata77-0-2,id=sata77-0-2 -drive 
file=/home/image/rhel7.0-459.qcow2,if=none,id=drive-sata77-0-3,format=raw,cache=none 
-device ide-hd,bus=sata77.3,drive=drive-sata77-0-3,id=sata77-0-3 -drive 
file=/home/image/rhel7.0-460.qcow2,if=none,id=drive-sata77-0-4,format=raw,cache=none 
-device ide-hd,bus=sata77.4,drive=drive-sata77-0-4,id=sata77-0-4 -drive 
file=/home/image/rhel7.0-461.qcow2,if=none,id=drive-sata77-0-5,format=raw,cache=none 
-device ide-hd,bus=sata77.5,drive=drive-sata77-0-5,id=sata77-0-5 -drive 
file=/home/image/rhel7.0-462.qcow2,if=none,id=drive-sata78-0-0,format=raw,cache=none 
-device ide-hd,bus=sata78.0,drive=drive-sata78-0-0,id=sata78-0-0 -drive 
file=/home/image/rhel7.0-463.qcow2,if=none,id=drive-sata78-0-1,format=raw,cache=none 
-device ide-hd,bus=sata78.1,drive=drive-sata78-0-1,id=sata78-0-1 -drive 
file=/home/image/rhel7.0-464.qcow2,if=none,id=drive-sata78-0-2,format=raw,cache=none 
-device ide-hd,bus=sata78.2,drive=drive-sata78-0-2,id=sata78-0-2 -drive 
file=/home/image/rhel7.0-465.qcow2,if=none,id=drive-sata78-0-3,format=raw,cache=none 
-device ide-hd,bus=sata78.3,drive=drive-sata78-0-3,id=sata78-0-3 -drive 
file=/home/image/rhel7.0-466.qcow2,if=none,id=drive-sata78-0-4,format=raw,cache=none 
-device ide-hd,bus=sata78.4,drive=drive-sata78-0-4,id=sata78-0-4 -drive 
file=/home/image/rhel7.0-467.qcow2,if=none,id=drive-sata78-0-5,format=raw,cache=none 
-device ide-hd,bus=sata78.5,drive=drive-sata78-0-5,id=sata78-0-5 -drive 
file=/home/image/rhel7.0-468.qcow2,if=none,id=drive-sata79-0-0,format=raw,cache=none 
-device ide-hd,bus=sata79.0,drive=drive-sata79-0-0,id=sata79-0-0 -drive 
file=/home/image/rhel7.0-469.qcow2,if=none,id=drive-sata79-0-1,format=raw,cache=none 
-device ide-hd,bus=sata79.1,drive=drive-sata79-0-1,id=sata79-0-1 -drive 
file=/home/image/rhel7.0-470.qcow2,if=none,id=drive-sata79-0-2,format=raw,cache=none 
-device ide-hd,bus=sata79.2,drive=drive-sata79-0-2,id=sata79-0-2 -drive 
file=/home/image/rhel7.0-471.qcow2,if=none,id=drive-sata79-0-3,format=raw,cache=none 
-device ide-hd,bus=sata79.3,drive=drive-sata79-0-3,id=sata79-0-3 -drive 
file=/home/image/rhel7.0-472.qcow2,if=none,id=drive-sata79-0-4,format=raw,cache=none 
-device ide-hd,bus=sata79.4,drive=drive-sata79-0-4,id=sata79-0-4 -drive 
file=/home/image/rhel7.0-473.qcow2,if=none,id=drive-sata79-0-5,format=raw,cache=none 
-device ide-hd,bus=sata79.5,drive=drive-sata79-0-5,id=sata79-0-5 -drive 
file=/home/image/rhel7.0-474.qcow2,if=none,id=drive-sata80-0-0,format=raw,cache=none 
-device ide-hd,bus=sata80.0,drive=drive-sata80-0-0,id=sata80-0-0 -drive 
file=/home/image/rhel7.0-475.qcow2,if=none,id=drive-sata80-0-1,format=raw,cache=none 
-device ide-hd,bus=sata80.1,drive=drive-sata80-0-1,id=sata80-0-1 -drive 
file=/home/image/rhel7.0-476.qcow2,if=none,id=drive-sata80-0-2,format=raw,cache=none 
-device ide-hd,bus=sata80.2,drive=drive-sata80-0-2,id=sata80-0-2 -drive 
file=/home/image/rhel7.0-477.qcow2,if=none,id=drive-sata80-0-3,format=raw,cache=none 
-device ide-hd,bus=sata80.3,drive=drive-sata80-0-3,id=sata80-0-3 -drive 
file=/home/image/rhel7.0-478.qcow2,if=none,id=drive-sata80-0-4,format=raw,cache=none 
-device ide-hd,bus=sata80.4,drive=drive-sata80-0-4,id=sata80-0-4 -drive 
file=/home/image/rhel7.0-479.qcow2,if=none,id=drive-sata80-0-5,format=raw,cache=none 
-device ide-hd,bus=sata80.5,drive=drive-sata80-0-5,id=sata80-0-5 -drive 
file=/home/image/rhel7.0-480.qcow2,if=none,id=drive-sata81-0-0,format=raw,cache=none 
-device ide-hd,bus=sata81.0,drive=drive-sata81-0-0,id=sata81-0-0 -drive 
file=/home/image/rhel7.0-481.qcow2,if=none,id=drive-sata81-0-1,format=raw,cache=none 
-device ide-hd,bus=sata81.1,drive=drive-sata81-0-1,id=sata81-0-1 -drive 
file=/home/image/rhel7.0-482.qcow2,if=none,id=drive-sata81-0-2,format=raw,cache=none 
-device ide-hd,bus=sata81.2,drive=drive-sata81-0-2,id=sata81-0-2 -drive 
file=/home/image/rhel7.0-483.qcow2,if=none,id=drive-sata81-0-3,format=raw,cache=none 
-device ide-hd,bus=sata81.3,drive=drive-sata81-0-3,id=sata81-0-3 -drive 
file=/home/image/rhel7.0-484.qcow2,if=none,id=drive-sata81-0-4,format=raw,cache=none 
-device ide-hd,bus=sata81.4,drive=drive-sata81-0-4,id=sata81-0-4 -drive 
file=/home/image/rhel7.0-485.qcow2,if=none,id=drive-sata81-0-5,format=raw,cache=none 
-device ide-hd,bus=sata81.5,drive=drive-sata81-0-5,id=sata81-0-5 -drive 
file=/home/image/rhel7.0-486.qcow2,if=none,id=drive-sata82-0-0,format=raw,cache=none 
-device ide-hd,bus=sata82.0,drive=drive-sata82-0-0,id=sata82-0-0 -drive 
file=/home/image/rhel7.0-487.qcow2,if=none,id=drive-sata82-0-1,format=raw,cache=none 
-device ide-hd,bus=sata82.1,drive=drive-sata82-0-1,id=sata82-0-1 -drive 
file=/home/image/rhel7.0-488.qcow2,if=none,id=drive-sata82-0-2,format=raw,cache=none 
-device ide-hd,bus=sata82.2,drive=drive-sata82-0-2,id=sata82-0-2 -drive 
file=/home/image/rhel7.0-489.qcow2,if=none,id=drive-sata82-0-3,format=raw,cache=none 
-device ide-hd,bus=sata82.3,drive=drive-sata82-0-3,id=sata82-0-3 -drive 
file=/home/image/rhel7.0-490.qcow2,if=none,id=drive-sata82-0-4,format=raw,cache=none 
-device ide-hd,bus=sata82.4,drive=drive-sata82-0-4,id=sata82-0-4 -drive 
file=/home/image/rhel7.0-491.qcow2,if=none,id=drive-sata82-0-5,format=raw,cache=none 
-device ide-hd,bus=sata82.5,drive=drive-sata82-0-5,id=sata82-0-5 -drive 
file=/home/image/rhel7.0-492.qcow2,if=none,id=drive-sata83-0-0,format=raw,cache=none 
-device ide-hd,bus=sata83.0,drive=drive-sata83-0-0,id=sata83-0-0 -drive 
file=/home/image/rhel7.0-493.qcow2,if=none,id=drive-sata83-0-1,format=raw,cache=none 
-device ide-hd,bus=sata83.1,drive=drive-sata83-0-1,id=sata83-0-1 -drive 
file=/home/image/rhel7.0-494.qcow2,if=none,id=drive-sata83-0-2,format=raw,cache=none 
-device ide-hd,bus=sata83.2,drive=drive-sata83-0-2,id=sata83-0-2 -drive 
file=/home/image/rhel7.0-495.qcow2,if=none,id=drive-sata83-0-3,format=raw,cache=none 
-device ide-hd,bus=sata83.3,drive=drive-sata83-0-3,id=sata83-0-3 -drive 
file=/home/image/rhel7.0-496.qcow2,if=none,id=drive-sata83-0-4,format=raw,cache=none 
-device ide-hd,bus=sata83.4,drive=drive-sata83-0-4,id=sata83-0-4 -drive 
file=/home/image/rhel7.0-497.qcow2,if=none,id=drive-sata83-0-5,format=raw,cache=none 
-device ide-hd,bus=sata83.5,drive=drive-sata83-0-5,id=sata83-0-5 -drive 
file=/home/image/rhel7.0-498.qcow2,if=none,id=drive-sata84-0-0,format=raw,cache=none 
-device ide-hd,bus=sata84.0,drive=drive-sata84-0-0,id=sata84-0-0 -drive 
file=/home/image/rhel7.0-499.qcow2,if=none,id=drive-sata84-0-1,format=raw,cache=none 
-device ide-hd,bus=sata84.1,drive=drive-sata84-0-1,id=sata84-0-1 -drive 
file=/home/image/rhel7.0-500.qcow2,if=none,id=drive-virtio-disk0,format=raw 
-device 
virtio-blk-pci,scsi=off,bus=pci.0,addr=0xc,drive=drive-virtio-disk0,id=virtio-disk0 
-netdev tap,fd=24,id=hostnet0 -device 
rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:c2:9d:dd,bus=pci.0,addr=0xb 
-vnc 0.0.0.0:0 -k en-us -device cirrus-vga,id=video0,bus=pci.0,addr=0x7 
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0xa -msg timestamp=on

>
>
>
>

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Dou Liyang]

Hi Stefan,

At 12/20/2016 05:39 PM, Stefan Hajnoczi wrote:
> On Tue, Dec 20, 2016 at 12:32:40AM +0800, Fam Zheng wrote:
>> On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
>>> On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
>>>> These patches aim to refactor the qmp_query_blockstats() and
>>>> improve the performance by reducing the running time of it.
>>>>
>>>> qmp_query_blockstats() is used to monitor the blockstats, it
>>>> querys all the graph_bdrv_states or monitor_block_backends.
>>>>
>>>> There are the two jobs:
>>>>
>>>> 1 For the performance:
>>>>
>>>> 1.1 the time it takes(ns) in each time:
>>>> the disk numbers     | 10    | 500
>>>> -------------------------------------
>>>> before these patches | 19429 | 667722
>>>> after these patches  | 17516 | 557044
>>>>
>>>> 1.2 the I/O performance is degraded(%) during the monitor:
>>>>
>>>> the disk numbers     | 10    | 500
>>>> -------------------------------------
>>>> before these patches | 1.3   | 14.2
>>>> after these patches  | 0.8   | 9.1
>>>
>>> Do you know what is consuming the remaining 9.1%?
>>>
>>> I'm surprised to see such a high performance impact caused by a QMP
>>> command.
>>
>> If it's "performance is 9.1% worse only during the 557044 ns when the QMP
>> command is being processed", it's probably becaues the main loop is stalled a
>> bit, and it's not a big problem. I'd be very surprised if the degradation is
>> more longer than that.
>
> It would be interesting to compare against virtio-blk dataplane.  That
> way the QMP command can execute without interfering with disk I/O activity.
>

Yes, I will try to do it for you.

I have compared against the disk of IDE/SATA, I think the I/O requests
is handled by the vcpu threads. it isn't be disturbed like virtio-blk
dataplane. but its performance also degraded.


Thanks,

	Liyang.


> qemu-system-x86_64 ... \
>     -object iothread,id=iothread0 \
>     -drive if=none,id=drive0,file=vm.img,format=raw,aio=native,cache=none \
>     -device virtio-blk-pci,drive=drive0,iothread=iothread0
>
> Stefan
>

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Stefan Hajnoczi]

On Tue, Dec 20, 2016 at 9:54 AM, Dou Liyang <douly.fnst@cn.fujitsu.com> wrote:
> At 12/20/2016 05:39 PM, Stefan Hajnoczi wrote:
>>
>> On Tue, Dec 20, 2016 at 12:32:40AM +0800, Fam Zheng wrote:
>>>
>>> On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
>>>>
>>>> On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
>>>>>
>>>>> These patches aim to refactor the qmp_query_blockstats() and
>>>>> improve the performance by reducing the running time of it.
>>>>>
>>>>> qmp_query_blockstats() is used to monitor the blockstats, it
>>>>> querys all the graph_bdrv_states or monitor_block_backends.
>>>>>
>>>>> There are the two jobs:
>>>>>
>>>>> 1 For the performance:
>>>>>
>>>>> 1.1 the time it takes(ns) in each time:
>>>>> the disk numbers     | 10    | 500
>>>>> -------------------------------------
>>>>> before these patches | 19429 | 667722
>>>>> after these patches  | 17516 | 557044
>>>>>
>>>>> 1.2 the I/O performance is degraded(%) during the monitor:
>>>>>
>>>>> the disk numbers     | 10    | 500
>>>>> -------------------------------------
>>>>> before these patches | 1.3   | 14.2
>>>>> after these patches  | 0.8   | 9.1
>>>>
>>>>
>>>> Do you know what is consuming the remaining 9.1%?
>>>>
>>>> I'm surprised to see such a high performance impact caused by a QMP
>>>> command.
>>>
>>>
>>> If it's "performance is 9.1% worse only during the 557044 ns when the QMP
>>> command is being processed", it's probably becaues the main loop is
>>> stalled a
>>> bit, and it's not a big problem. I'd be very surprised if the degradation
>>> is
>>> more longer than that.
>>
>>
>> It would be interesting to compare against virtio-blk dataplane.  That
>> way the QMP command can execute without interfering with disk I/O
>> activity.
>>
>
> Yes, I will try to do it for you.
>
> I have compared against the disk of IDE/SATA, I think the I/O requests
> is handled by the vcpu threads. it isn't be disturbed like virtio-blk
> dataplane. but its performance also degraded.

IDE/SATA does I/O request *submission* in the vcpu thread.  Completion
is processed by the main loop.  Therefore it is also affected by slow
monitor commands.

Stefan

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Dou Liyang]

At 12/20/2016 06:01 PM, Stefan Hajnoczi wrote:
> On Tue, Dec 20, 2016 at 9:54 AM, Dou Liyang <douly.fnst@cn.fujitsu.com> wrote:
>> At 12/20/2016 05:39 PM, Stefan Hajnoczi wrote:
>>>
>>> On Tue, Dec 20, 2016 at 12:32:40AM +0800, Fam Zheng wrote:
>>>>
>>>> On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
>>>>>
>>>>> On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
>>>>>>
>>>>>> These patches aim to refactor the qmp_query_blockstats() and
>>>>>> improve the performance by reducing the running time of it.
>>>>>>
>>>>>> qmp_query_blockstats() is used to monitor the blockstats, it
>>>>>> querys all the graph_bdrv_states or monitor_block_backends.
>>>>>>
>>>>>> There are the two jobs:
>>>>>>
>>>>>> 1 For the performance:
>>>>>>
>>>>>> 1.1 the time it takes(ns) in each time:
>>>>>> the disk numbers     | 10    | 500
>>>>>> -------------------------------------
>>>>>> before these patches | 19429 | 667722
>>>>>> after these patches  | 17516 | 557044
>>>>>>
>>>>>> 1.2 the I/O performance is degraded(%) during the monitor:
>>>>>>
>>>>>> the disk numbers     | 10    | 500
>>>>>> -------------------------------------
>>>>>> before these patches | 1.3   | 14.2
>>>>>> after these patches  | 0.8   | 9.1
>>>>>
>>>>>
>>>>> Do you know what is consuming the remaining 9.1%?
>>>>>
>>>>> I'm surprised to see such a high performance impact caused by a QMP
>>>>> command.
>>>>
>>>>
>>>> If it's "performance is 9.1% worse only during the 557044 ns when the QMP
>>>> command is being processed", it's probably becaues the main loop is
>>>> stalled a
>>>> bit, and it's not a big problem. I'd be very surprised if the degradation
>>>> is
>>>> more longer than that.
>>>
>>>
>>> It would be interesting to compare against virtio-blk dataplane.  That
>>> way the QMP command can execute without interfering with disk I/O
>>> activity.
>>>
>>
>> Yes, I will try to do it for you.
>>
>> I have compared against the disk of IDE/SATA, I think the I/O requests
>> is handled by the vcpu threads. it isn't be disturbed like virtio-blk
>> dataplane. but its performance also degraded.
>
> IDE/SATA does I/O request *submission* in the vcpu thread.  Completion
> is processed by the main loop.  Therefore it is also affected by slow
> monitor commands.
>

Can you tell me one of the completion method in Qemu? I want to learn
more.

Thanks,

   Liyang.

> Stefan
>
>
>

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Stefan Hajnoczi]

On Tue, Dec 20, 2016 at 10:26 AM, Dou Liyang <douly.fnst@cn.fujitsu.com> wrote:
> At 12/20/2016 06:01 PM, Stefan Hajnoczi wrote:
>>
>> On Tue, Dec 20, 2016 at 9:54 AM, Dou Liyang <douly.fnst@cn.fujitsu.com>
>> wrote:
>>>
>>> At 12/20/2016 05:39 PM, Stefan Hajnoczi wrote:
>>>>
>>>>
>>>> On Tue, Dec 20, 2016 at 12:32:40AM +0800, Fam Zheng wrote:
>>>>>
>>>>>
>>>>> On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
>>>>>>
>>>>>>
>>>>>> On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
>>>>>>>
>>>>>>>
>>>>>>> These patches aim to refactor the qmp_query_blockstats() and
>>>>>>> improve the performance by reducing the running time of it.
>>>>>>>
>>>>>>> qmp_query_blockstats() is used to monitor the blockstats, it
>>>>>>> querys all the graph_bdrv_states or monitor_block_backends.
>>>>>>>
>>>>>>> There are the two jobs:
>>>>>>>
>>>>>>> 1 For the performance:
>>>>>>>
>>>>>>> 1.1 the time it takes(ns) in each time:
>>>>>>> the disk numbers     | 10    | 500
>>>>>>> -------------------------------------
>>>>>>> before these patches | 19429 | 667722
>>>>>>> after these patches  | 17516 | 557044
>>>>>>>
>>>>>>> 1.2 the I/O performance is degraded(%) during the monitor:
>>>>>>>
>>>>>>> the disk numbers     | 10    | 500
>>>>>>> -------------------------------------
>>>>>>> before these patches | 1.3   | 14.2
>>>>>>> after these patches  | 0.8   | 9.1
>>>>>>
>>>>>>
>>>>>>
>>>>>> Do you know what is consuming the remaining 9.1%?
>>>>>>
>>>>>> I'm surprised to see such a high performance impact caused by a QMP
>>>>>> command.
>>>>>
>>>>>
>>>>>
>>>>> If it's "performance is 9.1% worse only during the 557044 ns when the
>>>>> QMP
>>>>> command is being processed", it's probably becaues the main loop is
>>>>> stalled a
>>>>> bit, and it's not a big problem. I'd be very surprised if the
>>>>> degradation
>>>>> is
>>>>> more longer than that.
>>>>
>>>>
>>>>
>>>> It would be interesting to compare against virtio-blk dataplane.  That
>>>> way the QMP command can execute without interfering with disk I/O
>>>> activity.
>>>>
>>>
>>> Yes, I will try to do it for you.
>>>
>>> I have compared against the disk of IDE/SATA, I think the I/O requests
>>> is handled by the vcpu threads. it isn't be disturbed like virtio-blk
>>> dataplane. but its performance also degraded.
>>
>>
>> IDE/SATA does I/O request *submission* in the vcpu thread.  Completion
>> is processed by the main loop.  Therefore it is also affected by slow
>> monitor commands.
>>
>
> Can you tell me one of the completion method in Qemu? I want to learn
> more.

How completion works depends on the -drive aio= option.

With aio=threads you need to look at thread-pool.c and block/raw-posix.c.

With aio=native you need to look at block/linux-aio.c

Since disk I/O is asynchronous there will be a completion event in the
AioContext to check the result of a completed I/O request and let the
device model (e.g. virtio-blk) process it.

Stefan

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Dou Liyang]

Hi Stefan,

At 12/20/2016 05:39 PM, Stefan Hajnoczi wrote:
> On Tue, Dec 20, 2016 at 12:32:40AM +0800, Fam Zheng wrote:
>> On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
>>> On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
>>>> These patches aim to refactor the qmp_query_blockstats() and
>>>> improve the performance by reducing the running time of it.
>>>>
>>>> qmp_query_blockstats() is used to monitor the blockstats, it
>>>> querys all the graph_bdrv_states or monitor_block_backends.
>>>>
>>>> There are the two jobs:
>>>>
>>>> 1 For the performance:
>>>>
>>>> 1.1 the time it takes(ns) in each time:
>>>> the disk numbers     | 10    | 500
>>>> -------------------------------------
>>>> before these patches | 19429 | 667722
>>>> after these patches  | 17516 | 557044
>>>>
>>>> 1.2 the I/O performance is degraded(%) during the monitor:
>>>>
>>>> the disk numbers     | 10    | 500
>>>> -------------------------------------
>>>> before these patches | 1.3   | 14.2
>>>> after these patches  | 0.8   | 9.1
>>>
>>> Do you know what is consuming the remaining 9.1%?
>>>
>>> I'm surprised to see such a high performance impact caused by a QMP
>>> command.
>>
>> If it's "performance is 9.1% worse only during the 557044 ns when the QMP
>> command is being processed", it's probably becaues the main loop is stalled a
>> bit, and it's not a big problem. I'd be very surprised if the degradation is
>> more longer than that.
>
> It would be interesting to compare against virtio-blk dataplane.  That
> way the QMP command can execute without interfering with disk I/O activity.
>
> qemu-system-x86_64 ... \
>     -object iothread,id=iothread0 \
>     -drive if=none,id=drive0,file=vm.img,format=raw,aio=native,cache=none \
>     -device virtio-blk-pci,drive=drive0,iothread=iothread0

Here is the result in the guest with 500 disks:

QMP command     | not execute | execute in each 0.5s |
-------------------------------------------------------
Average Times/s | 102.34675   | 103.128              |

the degradation is 0.76%, that can be ignored.

the dd command:
dd if=date_1.dat of=date_2.dat conv=fsync oflag=direct bs=1k count=400k


Thanks,

   Liyang.

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Stefan Hajnoczi]

[-- Attachment #1: Type: text/plain, Size: 2565 bytes --]

On Wed, Dec 21, 2016 at 05:13:39PM +0800, Dou Liyang wrote:
> Hi Stefan,
> 
> At 12/20/2016 05:39 PM, Stefan Hajnoczi wrote:
> > On Tue, Dec 20, 2016 at 12:32:40AM +0800, Fam Zheng wrote:
> > > On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
> > > > On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
> > > > > These patches aim to refactor the qmp_query_blockstats() and
> > > > > improve the performance by reducing the running time of it.
> > > > > 
> > > > > qmp_query_blockstats() is used to monitor the blockstats, it
> > > > > querys all the graph_bdrv_states or monitor_block_backends.
> > > > > 
> > > > > There are the two jobs:
> > > > > 
> > > > > 1 For the performance:
> > > > > 
> > > > > 1.1 the time it takes(ns) in each time:
> > > > > the disk numbers     | 10    | 500
> > > > > -------------------------------------
> > > > > before these patches | 19429 | 667722
> > > > > after these patches  | 17516 | 557044
> > > > > 
> > > > > 1.2 the I/O performance is degraded(%) during the monitor:
> > > > > 
> > > > > the disk numbers     | 10    | 500
> > > > > -------------------------------------
> > > > > before these patches | 1.3   | 14.2
> > > > > after these patches  | 0.8   | 9.1
> > > > 
> > > > Do you know what is consuming the remaining 9.1%?
> > > > 
> > > > I'm surprised to see such a high performance impact caused by a QMP
> > > > command.
> > > 
> > > If it's "performance is 9.1% worse only during the 557044 ns when the QMP
> > > command is being processed", it's probably becaues the main loop is stalled a
> > > bit, and it's not a big problem. I'd be very surprised if the degradation is
> > > more longer than that.
> > 
> > It would be interesting to compare against virtio-blk dataplane.  That
> > way the QMP command can execute without interfering with disk I/O activity.
> > 
> > qemu-system-x86_64 ... \
> >     -object iothread,id=iothread0 \
> >     -drive if=none,id=drive0,file=vm.img,format=raw,aio=native,cache=none \
> >     -device virtio-blk-pci,drive=drive0,iothread=iothread0
> 
> Here is the result in the guest with 500 disks:
> 
> QMP command     | not execute | execute in each 0.5s |
> -------------------------------------------------------
> Average Times/s | 102.34675   | 103.128              |
> 
> the degradation is 0.76%, that can be ignored.
> 
> the dd command:
> dd if=date_1.dat of=date_2.dat conv=fsync oflag=direct bs=1k count=400k

Excellent.  It's good to know that dataplane is a solution to this
problem.

Stefan

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 455 bytes --]

Re: [Qemu-devel] [PATCH RFC v2 0/4] block/qapi: refactor and optimize the qmp_query_blockstats()

[Dou Liyang]

At 12/21/2016 07:06 PM, Stefan Hajnoczi wrote:
> On Wed, Dec 21, 2016 at 05:13:39PM +0800, Dou Liyang wrote:
>> Hi Stefan,
>>
>> At 12/20/2016 05:39 PM, Stefan Hajnoczi wrote:
>>> On Tue, Dec 20, 2016 at 12:32:40AM +0800, Fam Zheng wrote:
>>>> On Mon, 12/19 15:02, Stefan Hajnoczi wrote:
>>>>> On Mon, Dec 19, 2016 at 04:51:22PM +0800, Dou Liyang wrote:
>>>>>> These patches aim to refactor the qmp_query_blockstats() and
>>>>>> improve the performance by reducing the running time of it.
>>>>>>
>>>>>> qmp_query_blockstats() is used to monitor the blockstats, it
>>>>>> querys all the graph_bdrv_states or monitor_block_backends.
>>>>>>
>>>>>> There are the two jobs:
>>>>>>
>>>>>> 1 For the performance:
>>>>>>
>>>>>> 1.1 the time it takes(ns) in each time:
>>>>>> the disk numbers     | 10    | 500
>>>>>> -------------------------------------
>>>>>> before these patches | 19429 | 667722
>>>>>> after these patches  | 17516 | 557044
>>>>>>
>>>>>> 1.2 the I/O performance is degraded(%) during the monitor:
>>>>>>
>>>>>> the disk numbers     | 10    | 500
>>>>>> -------------------------------------
>>>>>> before these patches | 1.3   | 14.2
>>>>>> after these patches  | 0.8   | 9.1
>>>>>
>>>>> Do you know what is consuming the remaining 9.1%?
>>>>>
>>>>> I'm surprised to see such a high performance impact caused by a QMP
>>>>> command.
>>>>
>>>> If it's "performance is 9.1% worse only during the 557044 ns when the QMP
>>>> command is being processed", it's probably becaues the main loop is stalled a
>>>> bit, and it's not a big problem. I'd be very surprised if the degradation is
>>>> more longer than that.
>>>
>>> It would be interesting to compare against virtio-blk dataplane.  That
>>> way the QMP command can execute without interfering with disk I/O activity.
>>>
>>> qemu-system-x86_64 ... \
>>>     -object iothread,id=iothread0 \
>>>     -drive if=none,id=drive0,file=vm.img,format=raw,aio=native,cache=none \
>>>     -device virtio-blk-pci,drive=drive0,iothread=iothread0
>>
>> Here is the result in the guest with 500 disks:
>>
>> QMP command     | not execute | execute in each 0.5s |
>> -------------------------------------------------------
>> Average Times/s | 102.34675   | 103.128              |
>>
>> the degradation is 0.76%, that can be ignored.
>>
>> the dd command:
>> dd if=date_1.dat of=date_2.dat conv=fsync oflag=direct bs=1k count=400k
>
> Excellent.  It's good to know that dataplane is a solution to this
> problem.
>

Yes, Thanks very much.

now, I am not sure if these patches are needed. the patches just shorten 
the QMP command time.

No matter how, I will clarify their real purpose in the next version.

Thanks,

   Liyang