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From: Tushar Gohad <tusharsg at gmail.com>
Subject: =?utf-8?q?Re=3A_=5BSPDK=5D_Bluestore_device=E2=80=99s_device_selector_for?=
 =?utf-8?q?_Samsung_NVMe?=
Date: Mon, 14 Jan 2019 21:44:41 -0700
Message-ID: <CAJYz097VgB6+CCqFZvw1zZ3S2501YOA5zaB61GGOti6CG+7uOw@mail.gmail.com>
In-Reply-To: 2018A2F3-052D-488A-8CB4-486CD4BE7E3C@intel.com
List-ID: <spdk@lists.01.org>
To: spdk@lists.01.org

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Hi Yanko,

Acknowledging what Jim said, the SPDK backend for Bluestore is not widely
in use due to limited benefit today (the bottlenecks are elsewhere, outside
of the Bluestore blockdev layer), which is why the documentation at [1] is
only minimal.  That being said, we should get the documentation fixed.  I
see that you posted this message to ceph-users.  I will work with you there
to get this addressed.

Thanks,
Tushar

On Mon, Jan 14, 2019 at 11:49 AM Harris, James R <james.r.harris(a)intel.co=
m>
wrote:

> Hi Yanko,
>
> I'm not sure if such a manual exists - one of the Ceph mailing lists may
> be a better forum to get pointers for that.
>
> Regards,
>
> -Jim
>
>
> =EF=BB=BFOn 1/14/19, 10:41 AM, "SPDK on behalf of Yanko Davila" <
> spdk-bounces(a)lists.01.org on behalf of davila(a)cognitec.com> wrote:
>
>     Hi Jim
>
>     Thank you for your answer. I was able to find the device selector. Now
> I have an issue understanding the steps to activate the osd. Once I setup
> spdk the device disappears from lsblk as expected. So the ceph manual is
> not very helpful after spdk is enabled. Is there any manual that walks you
> through the steps to add an spdk nvme to ceph ?? Thanks again for your
> time.
>
>     Yanko.
>
>     > On Jan 14, 2019, at 4:18 PM, Harris, James R <
> james.r.harris(a)intel.com> wrote:
>     >
>     > Hi Yanko,
>     >
>     > I think the Ceph documentation is not quite accurate.  Not all Intel
> NVMe SSDs have device ID 0x0953.  Similarly, Samsung NVMe SSDs likely have
> several different device IDs depending on the model.
>     >
>     > I would suggest just doing "lspci | grep Volatile" to find the NVMe
> SSD bus/device/functions on your system.
>     >
>     > -Jim
>     >
>     >
>     > On 1/14/19, 7:12 AM, "SPDK on behalf of Yanko Davila" <
> spdk-bounces(a)lists.01.org on behalf of davila(a)cognitec.com> wrote:
>     >
>     >    Hello
>     >
>     >    My name is Yanko Davila, I=C2=B4m new to ceph so please pardon my
> ignorance.
>     >    I have a question about Bluestore and SPDK.
>     >
>     >    I=C2=B4m currently running ceph version:
>     >
>     >    ceph version 12.2.10 (177915764b752804194937482a39e95e0ca3de94)
> luminous
>     >    (stable)
>     >
>     >    on Debian:
>     >
>     >    Linux <hostname> 4.9.0-8-amd64 #1 SMP Debian 4.9.110-3+deb9u4
>     >    (2018-08-21) x86_64 GNU/Linux
>     >
>     >    Distributor ID:    Debian
>     >    Description:    Debian GNU/Linux 9.5 (stretch)
>     >    Release:    9.5
>     >    Codename:    stretch
>     >
>     >    I=C2=B4m trying to add an NVMe osd using bluestore but I=C2=B4m =
struggling
> to find
>     >    the device selector for that NVMe. So far I=C2=B4ve been  able to
> compile
>     >    spdk and succesfully run the setup.sh script. I can also
> succesfully run
>     >    the identify example which leads me to think that spdk is working
> as
>     >    expected.
>     >
>     >    When I read the online manual (
>     >
> http://docs.ceph.com/docs/master/rados/configuration/bluestore-config-ref=
/#spdk-usage
>     >    ) it gives an example for an Intel PCIe SSD:
>     >
>     >    <quote>
>     >
>     >    For example, users can find the device selector of an Intel PCIe
> SSD with:
>     >
>     >    $ lspci -mm -n -D -d 8086:0953
>     >
>     >    <quote />
>     >
>     >    When I try the same command adjusting for my Samsung SSD it
> returns
>     >    nothing or the return is just blank here is what I tried:
>     >
>     >    $ lspci -mm -n -D -d 144d:a801
>     >
>     >
>     >    Assuming that I gave you enough information. Can anyone spot what
> I=C2=B4m
>     >    doing wrong? Does spdk only works on Intel SSDs ? Any comment is
> highly
>     >    appreciated. Thank You for your time.
>     >
>     >    Yanko.
>     >
>     >
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>     >
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