[ceph-users] Recovery operations and ioprio options

Захаров Алексей zakharov.a.g at yandex.ru
Thu Nov 9 03:21:39 PST 2017


Hi, Nick
Thank you for the answer!

It's still unclear for me, do those options have no effect at all?
Or disk thread is used for some other operations?

09.11.2017, 04:18, "Nick Fisk" <nick at fisk.me.uk>:
>>  -----Original Message-----
>>  From: ceph-users [mailto:ceph-users-bounces at lists.ceph.com] On Behalf Of
>>  ??????? ???????
>>  Sent: 08 November 2017 16:21
>>  To: ceph-users at lists.ceph.com
>>  Subject: [ceph-users] Recovery operations and ioprio options
>>
>>  Hello,
>>  Today we use ceph jewel with:
>>    osd disk thread ioprio class=idle
>>    osd disk thread ioprio priority=7
>>  and "nodeep-scrub" flag is set.
>>
>>  We want to change scheduler from CFQ to deadline, so these options will
>>  lose effect.
>>  I've tried to find out what operations are performed in "disk thread".
>
> What I
>>  found is that only scrubbing and snap-trimming operations are performed in
>>  "disk thread".
>
> In jewel those operations are now in the main OSD thread and setting the
> ioprio's will have no effect. Use the scrub and snap trim sleep options to
> throttle them.
>
>>  Do these options affect recovery operations?
>>  Are there any other operations in "disk thread", except scrubbing and
>
> snap-
>>  trimming?
>>
>>  --
>>  Regards,
>>  Aleksei Zakharov
>>  _______________________________________________
>>  ceph-users mailing list
>>  ceph-users at lists.ceph.com
>>  http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

-- 
Regards,
Aleksei Zakharov


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