Hello， Robert， I happened to find a note that you wrote in Nov 2015: http://lists.ceph.com/pipermail/ceph-users-ceph.com/2015-November/006173.html and I believe this is what i just hit exactly the same behavior : a host down will badly take the client performance down 1/10 (with 200MB/s recovery workload) and then took ten minutes to get good control of OSD recovery.
Could you please share how did you eventally solve that issue? by seting a fair large OSD recovery delay start or any other parameter? best regards, samuel huxia...@horebdata.cn From: Robert LeBlanc Date: 2019-10-16 21:46 To: huxia...@horebdata.cn CC: ceph-users Subject: Re: Re: [ceph-users] Openstack VM IOPS drops dramatically during Ceph recovery On Wed, Oct 16, 2019 at 11:53 AM huxia...@horebdata.cn <huxia...@horebdata.cn> wrote: > > My Ceph version is Luminuous 12.2.12. Do you think should i upgrade to > Nautilus, or will Nautilus have a better control of recovery/backfilling? We have a Jewel cluster and Luminuous cluster that we have changed these settings on and it really helped both of them. ---------------- Robert LeBlanc PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1
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