Thanks for the clarification! Glad to see this feature is being pursued. Chad. On 10/30/2018 12:24 PM, Gregory Farnum wrote: > On Mon, Oct 29, 2018 at 7:43 PM David Turner <drakonstein@xxxxxxxxx > <mailto:drakonstein@xxxxxxxxx>> wrote: > > min_size should be at least k+1 for EC. There are times to use k for > emergencies like you had. I would suggest seeing it back to 3 once > your back to healthy. > > As far as why you needed to reduce min_size, my guess would be that > recovery would have happened as long as k copies were up. Were the > PG's refusing to backfill or just hang backfilled yet? > > > Recovery on EC pools requires min_size rather than k shards at this > time. There were reasons; they weren't great. We're trying to get a fix > tested and merged at https://github.com/ceph/ceph/pull/17619 > -Greg > > > > On Mon, Oct 29, 2018, 9:24 PM Chad W Seys <cwseys@xxxxxxxxxxxxxxxx > <mailto:cwseys@xxxxxxxxxxxxxxxx>> wrote: > > Hi all, > Recently our cluster lost a drive and a node (3 drives) at > the same > time. Our erasure coded pools are all k2m2, so if all is working > correctly no data is lost. > However, there were 4 PGs that stayed "incomplete" until I > finally > took the suggestion in 'ceph health detail' to reduce min_size . > (Thanks > for the hint!) I'm not sure what it was (likely 3), but setting > it to 2 > caused all PGs to become active (though degraded) and the > cluster is on > path to recovering fully. > > In replicated pools, would not ceph create replicas without > the need > to reduce min_size? It seems odd to not recover automatically if > possible. Could someone explain what was going on there? > > Also, how to decide what min_size should be? > > Thanks! > Chad. > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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