I have used the gentle reweight script many times in the past. But more recently, I expanded one cluster from 334 to 1114 OSDs, by just changing the crush weight 100 OSDs at a time. Once all pgs from those 100 were stable and backfilling, add another hundred. I stopped at 500 and let the backfill finish. I repeated the process for the last 500 drives and it was finished in a weekend without any complaints. Don't forget to adjust your PG count for the new OSDs once rebalancing is done.
-Brett On Sun, Jun 23, 2019, 2:51 PM <c...@elchaka.de> wrote: > Hello, > > I would advice to use this Script from dan: > > https://github.com/cernceph/ceph-scripts/blob/master/tools/ceph-gentle-reweight > > I have Used it many Times and it works Great - also if you want to drain > the OSDs. > > Hth > Mehmet > > Am 30. Mai 2019 22:59:05 MESZ schrieb Michel Raabe <rmic...@devnu11.net>: >> >> Hi Mike, >> >> On 30.05.19 02:00, Mike Cave wrote: >> >>> I’d like a s little friction for the cluster as possible as it is in >>> heavy use right now. >>> >>> I’m running mimic (13.2.5) on CentOS. >>> >>> Any suggestions on best practices for this? >>> >> >> You can limit the recovery for example >> >> * max backfills >> * recovery max active >> * recovery sleep >> >> It will slow down the rebalance but will not hurt the users too much. >> >> >> Michel. >> ------------------------------ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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