hi, Loic:
Do you think it is patch https://github.com/ceph/ceph/pull/3318
worth of backport to firely and giant?
2015-04-13 14:00 GMT+08:00 Christian Balzer <chibi@xxxxxxx>:
>
> On Mon, 13 Apr 2015 13:42:39 +0800 池信泽 wrote:
>
> I knew the scheduler was in the pipeline, good to see it made it in.
>
> However the vast majority of people with production clusters will be
> running something "stable", mostly Firefly at this moment.
>
>> Sorry, 0.87 is giant.
>>
>> BTW, you could also set osd_scrub_sleep to your cluster. ceph would
>> sleep some time as you defined when it has scrub some objects.
>> But I am not sure whether is could works good to you.
>>
> Yeah, that bit is backported to Firefly and can definitely help, however
> the suggested initial value is too small for most people who have scrub
> issues, starting with 0.5 seconds and see how it goes seems to work better.
>
> Christian
>
>> Thanks.
>>
>> 2015-04-13 13:30 GMT+08:00 池信泽 <xmdxcxz@xxxxxxxxx>:
>> > hi, you could restrict scrub to certain times of day based on
>> > https://github.com/ceph/ceph/pull/3318.
>> >
>> > You could set osd_scrub_begin_hour and osd_scrub_begin_hour which are
>> > suitable for you. This feature is available since 0.93.
>> >
>> > But it has not been backport to 0.87 (hammer).
>> >
>> > 2015-04-13 12:55 GMT+08:00 Lindsay Mathieson
>> > <lindsay.mathieson@xxxxxxxxx>:
>> >>
>> >> On 13 April 2015 at 11:02, Christian Balzer <chibi@xxxxxxx> wrote:
>> >>>
>> >>> Yeah, that's a request/question that comes up frequently.
>> >>> And so far there's no option in Ceph to do that (AFAIK), it would be
>> >>> really nice along with scheduling options (don't scrub during peak
>> >>> hours), which have also been talked about.
>> >>
>> >>
>> >>
>> >>
>> >> I was just about to post a question on that ... :)
>> >>
>> >> Just had devs and support bitching to me that all their VM's were
>> >> running like dogs (they were). Ceph decided to run a deep scrub
>> >> Monday afternoon.
>> >>
>> >> It boggles me that there are no options for controlling the schedule,
>> >> considering how critically important the timing is. I'd be happy to
>> >> run a deep scrub ever night at 1am. Anytime during the day is a
>> >> disaster.
>> >>
>> >> So currently I have noscrub and nodeep-scrub set which is really less
>> >> than ideal.
>> >>
>> >>
>> >> --
>> >> Lindsay
>> >>
>> >> _______________________________________________
>> >> ceph-users mailing list
>> >> ceph-users@xxxxxxxxxxxxxx
>> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>> >>
>> >
>> >
>> >
>> > --
>> > Regards,
>> > xinze
>>
>>
>>
>
>
> --
> Christian Balzer Network/Systems Engineer
> chibi@xxxxxxx Global OnLine Japan/Fusion Communications
> http://www.gol.com/
--
Regards,
xinze
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