Am 22.04.2015 um 19:31 schrieb J David: > On Wed, Apr 22, 2015 at 7:12 AM, Stefan Priebe - Profihost AG > <s.priebe@xxxxxxxxxxxx> wrote: >> Also a reweight-by-utilization does nothing. > > As a fellow sufferer from this issue, mostly what I can offer you is > sympathy rather than actual help. However, this may be beneficial: > > By default, reweight-by-utilization only alters OSD's that are 20% > above average. This is really too conservative in our case, > especially for smaller OSD's. It also isn't helpful if the problem > isn't a couple of OSD's way above average, but rather some OSD's way > below. > > Try: > > # ceph osd reweight-by-utilization 110 Thanks that worked fine. > or possibly even: > > # ceph osd reweight-by-utilization 105 > > This should give more helpful results. > > To the extent that you still have problems after running that, like if > running it consistently fixes osd.1 but pushes utilizations of osd.2 > up too high and leaves osd.3 mostly empty, then you may have to start > assigning reweights by hand. > > Also, you didn't mention it explicitly, so if this cluster predates > 0.80.9 at all you may need to set: > > ceph osd crush set-tunable straw_calc_version 1 I had already done this. Stefan _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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