An OSD that is down does not recover or backfill. Faster recovery or backfill will not resolve down OSDs Paul -- Paul Emmerich Looking for help with your Ceph cluster? Contact us at https://croit.io croit GmbH Freseniusstr. 31h 81247 München www.croit.io Tel: +49 89 1896585 90 On Mon, Dec 9, 2019 at 1:42 PM Thomas Schneider <74cmonty@gmail.com> wrote:
Hi,
I think I can speed-up the recovery / backfill.
What is the recommended setting for osd_max_backfills osd_recovery_max_active ?
THX
Am 09.12.2019 um 13:36 schrieb Paul Emmerich:
This message is expected.
But your current situation is a great example of why having a separate cluster network is a bad idea in most situations. First thing I'd do in this scenario is to get rid of the cluster network and see if that helps
Paul
-- Paul Emmerich
Looking for help with your Ceph cluster? Contact us at https://croit.io
croit GmbH Freseniusstr. 31h 81247 München www.croit.io <http://www.croit.io> Tel: +49 89 1896585 90
On Mon, Dec 9, 2019 at 11:22 AM Thomas Schneider <74cmonty@gmail.com <mailto:74cmonty@gmail.com>> wrote:
Hi, I had a failure on 2 of 7 OSD nodes. This caused a server reboot and unfortunately the cluster network failed to come up.
This resulted in many OSD down situation.
I decided to stop all services (OSD, MGR, MON) and to start them sequentially.
Now I have multiple OSD marked as down although the service is running. None of these down OSDS is connected to the 2 nodes with failure.
In the OSD logs I can see multiple entries like this: 2019-12-09 11:13:10.378 7f9a372fb700 1 osd.374 pg_epoch: 493189 pg[11.1992( v 457986'92619 (303558'88266,457986'92619] local-lis/les=466724/466725 n=4107 ec=8346/8346 lis/c 466724/466724 les/c/f 466725/466725/176266 468956/493184/468423) [203,412] r=-1 lpr=493184 pi=[466724,493184)/1 crt=457986'92619 lcod 0'0 unknown NOTIFY mbc={}] state<Start>: transitioning to Stray
I tried to restart the impacted OSD w/o success, means the relevant OSD is still marked as down.
Is there a procedure to overcome this issue, means getting all OSD up?
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