Hi Yoann,

Thank you for your input. I was just told by RH support that it’s gonna make it 
to RHCS 2.0 (10.2.3). Thank you guys for the fix !

We thought about increasing the number of PGs just after changing the 
merge/split threshold values but this would have led to a _lot_ of data 
movements (1.2 billion of XFS files) over weeks, without any possibility to 
scrub / deep-scrub to ensure data consistency. Still as soon as we get the fix, 
we will increase the number of PGs.



> Le 1 déc. 2016 à 16:47, Yoann Moulin <yoann.mou...@epfl.ch> a écrit :
> Hello,
>> We're impacted by this bug (case 01725311). Our cluster is running RHCS 2.0 
>> and is no more capable to scrub neither deep-scrub.
>> [1] http://tracker.ceph.com/issues/17859
>> [2] https://bugzilla.redhat.com/show_bug.cgi?id=1394007
>> [3] https://github.com/ceph/ceph/pull/11898
>> I'm worried we'll have to live with a cluster that can't scrub/deep-scrub 
>> until March 2017 (ETA for RHCS 2.2 running Jewel 10.2.4).
>> Can we have this fix any sooner ?
> As far as I know about that bug, it appears if you have big PGs, a workaround 
> could be increasing the pg_num of the pool that has the biggest PGs.
> -- 
> Yoann Moulin

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