Re: enabling pg_autoscaler on a large production storage?

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Am Di., 16. Juni 2020 um 13:29 Uhr schrieb Zhenshi Zhou <deaderzzs@xxxxxxxxx>:
>
> I did this on my cluster and there was a huge number of pg rebalanced.
> I think setting this option to 'on' is a good idea if it's a brand new cluster.
>
On our new cluster we enabled them, but not on our primary cluster
with the most.

Dan van der Ster <dan@xxxxxxxxxxxxxx> 于2020年6月16日周二 下午7:07写道:
>
> Could you share the output of
>
>     ceph osd pool ls detail

pool 1 'pool 1' replicated size 3 min_size 2 crush_rule 0 object_hash
rjenkins pg_num 256 pgp_num 256 autoscale_mode warn last_change
2318859 flags hashpspool min_write_recency_for_promote 1 stripe_width
0 application rbd
pool 3 'pool 3' replicated size 3 min_size 2 crush_rule 0 object_hash
rjenkins pg_num 16384 pgp_num 16384 autoscale_mode warn last_change
2544040 lfor 0/0/1952329 flags hashpspool,selfmanaged_snaps
min_write_recency_for_promote 1 stripe_width 0 application rbd
pool 4 'pool 4' replicated size 3 min_size 2 crush_rule 0 object_hash
rjenkins pg_num 8 pgp_num 8 autoscale_mode warn last_change 2318859
flags hashpspool min_write_recency_for_promote 1 stripe_width 0
application rbd
pool 5 'pool 5' replicated size 3 min_size 2 crush_rule 0 object_hash
rjenkins pg_num 256 pgp_num 256 autoscale_mode warn last_change
2318859 flags hashpspool,selfmanaged_snaps
min_write_recency_for_promote 1 stripe_width 0 application rbd

the mgr module is not enabled yet.

>
> ?
>
> This way we can see how the pools are configured and help recommend if
> pg_autoscaler is worth enabling.
>

-- 
Die Selbsthilfegruppe "UTF-8-Probleme" trifft sich diesmal abweichend
im groüen Saal.
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