[sheepdog-users] Configuration on cheap server

[Hitoshi Mitake]

On Wed, Sep 21, 2016 at 7:31 PM, Cristian Del Carlo <
cristian.delcarlo at targetsolutions.it> wrote:

> Hi list,
>
> i have installed sheepdog on two server with Centos 7.2.
>
> The servers were purchased with SATA disks and configured with software
> raid.
> I use sheepdog version 1.0_41_gb5a7613.
>
> Sheepdog is running with this  settings:
> /usr/sbin/sheep --pidfile /var/run/sheep.pid --cluster corosync --log
> dst=syslog --upgrade /var/lib/sheepdog
>
> I use XFS for /var/lib/sheepdog.
> # xfs_info /var/lib/sheepdog/
> meta-data=/dev/md3               isize=256    agcount=4, agsize=116708356
> blks
>               =                       sectsz=512   attr=2, projid32bit=1
>               =                       crc=0        finobt=0
> data        =                       bsize=4096   blocks=466833424,
> imaxpct=5
>               =                       sunit=0      swidth=0 blks
> naming    =version 2              bsize=4096   ascii-ci=0 ftype=0
> log          =internal               bsize=4096   blocks=227946, version=2
>               =                       sectsz=512   sunit=0 blks,
> lazy-count=1
> realtime   =none                   extsz=4096   blocks=0, rtextents=0
>
>
> With kvm configured with "writeback" i have a vm with a performance of
> about 100 MB/s:
> dd if=/dev/zero of=/tmp/test.img bs=8k count=256k
>
> In your opinion what would be the best configuration to use to increase
> disk performance of vm with sheepdog 1.0?
>

I'm not sure about your performance goal but if you can allow potential
data loss, passing -n to sheep will increase write performance because it
reduces synchronous disk write.

Thanks,
Hitoshi


>
> Best regards,
>
> --
>
>
> *Cristian Del Carlo*
>
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>
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>
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