From: Alberto Garcia <berto@igalia.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: bfoster@redhat.com,
Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
qemu-devel@nongnu.org, qemu-block@nongnu.org,
Max Reitz <mreitz@redhat.com>
Subject: Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster
Date: Wed, 19 Aug 2020 17:53:07 +0200 [thread overview]
Message-ID: <w51k0xueios.fsf@maestria.local.igalia.com> (raw)
In-Reply-To: <w51mu2qejfb.fsf@maestria.local.igalia.com>
On Wed 19 Aug 2020 05:37:12 PM CEST, Alberto Garcia wrote:
> I ran the test again on a newly created filesystem just to make sure,
> here are the full results (numbers are IOPS):
>
> |----------------------+-------+-------|
> | preallocation | ext4 | xfs |
> |----------------------+-------+-------|
> | off | 11688 | 6981 |
> | off (w/o ZERO_RANGE) | 2780 | 3196 |
> | metadata | 9132 | 5764 |
> | falloc | 13108 | 5727 |
> | full | 16351 | 40759 |
> |----------------------+-------+-------|
Oh, and this is probably relevant, but the ext4 fs has much more free
space than the xfs one (which is almost full with the fully allocated
image). I'll try to run the tests again tomorrow with a larger
filesystem.
Berto
next prev parent reply other threads:[~2020-08-19 15:54 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-14 14:57 [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster Alberto Garcia
2020-08-14 14:57 ` [PATCH 1/1] " Alberto Garcia
2020-08-14 18:07 ` Vladimir Sementsov-Ogievskiy
2020-08-14 18:06 ` [PATCH 0/1] " Vladimir Sementsov-Ogievskiy
2020-08-17 10:10 ` Kevin Wolf
2020-08-17 15:31 ` Alberto Garcia
2020-08-17 15:53 ` Kevin Wolf
2020-08-17 15:58 ` Alberto Garcia
2020-08-17 18:18 ` Alberto Garcia
2020-08-18 8:18 ` Kevin Wolf
2020-08-19 14:25 ` Alberto Garcia
2020-08-19 15:07 ` Kevin Wolf
2020-08-19 15:37 ` Alberto Garcia
2020-08-19 15:53 ` Alberto Garcia [this message]
2020-08-19 17:53 ` Brian Foster
2020-08-20 20:03 ` Alberto Garcia
2020-08-20 21:58 ` Dave Chinner
2020-08-21 11:05 ` Brian Foster
2020-08-21 11:42 ` Alberto Garcia
2020-08-21 12:12 ` Alberto Garcia
2020-08-21 17:02 ` Brian Foster
2020-08-25 12:24 ` Alberto Garcia
2020-08-25 16:54 ` Brian Foster
2020-08-25 17:18 ` Alberto Garcia
2020-08-25 19:47 ` Brian Foster
2020-08-26 18:34 ` Alberto Garcia
2020-08-27 16:47 ` Brian Foster
2020-08-23 21:59 ` Dave Chinner
2020-08-24 20:14 ` Alberto Garcia
2020-08-21 12:59 ` Brian Foster
2020-08-21 15:51 ` Alberto Garcia
2020-08-23 22:16 ` Dave Chinner
2020-08-21 16:09 ` Alberto Garcia
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