Hi Samuel,
I tend to set the crush-weight to 0, but I am not sure if this is the
"correct" way.
ceph osd crush reweight osd.0 0
After the rebelance I can remove them from crush without rebalancing.
Hope that helps
Cheers
Boris
Am Fr., 3. Dez. 2021 um 13:09 Uhr schrieb huxiaoyu@xxxxxxxxxxxx <
huxiaoyu@xxxxxxxxxxxx>:
> Dear Cephers,
>
> I had to remove a failed OSD server node, and what i did is the following
> 1) First marked all OSDs on that (to be removed) server down and out
> 2) Secondly, let Ceph do backfilling and rebalancing, and wait for
> completing
> 3) Now i have full redundancy, so i delete thoses removed OSDs from the
> cluster, e.g. ceph osd cursh remove osd.${OSD_NUM}
> 4) To my surprise, after removing those already-out OSDs from the cluster,
> i was seeing a tons of PG remapped and once again BACKFILLING/REBALANCING
>
> What is major problems of the above procedure, which caused double
> BACKFILLING/REBALANCING? The root cause could be on those "already-out"
> OSDs but "not-yet being-removed" form CRUSH"? I previous thought those
> "out" OSDs would not impact CRUSH, but it seems i am wrong.
>
> Any suggestions, comments, explanations are highly appreciated,
>
> Best regards,
>
> Samuel
>
>
>
> huxiaoyu@xxxxxxxxxxxx
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