Dear Ceph users
yesterday I added a new host to my cluster. This triggered a rebalance
and now backfill is in progress. What I'm seeing is that many PGs are in
backfill_wait state, and just a few are actually backfilling:
pgs: 35081735/215211118 objects misplaced (16.301%)
348 active+remapped+backfill_wait
174 active+clean
7 active+remapped+backfilling
I prioritized the recovery by setting the high_recovery_ops scheduler
profile, but this just increased the recovery rate a bit while not
incrementing the number of actually backfilling PGs.
Is there a way to increment the number of PGs that backfill at the same
time? I guess this should speed up the operations, but I didn't find a
way to do so. Currently I have very little load from users so I can
devote all the resources to the recovery.
Using Ceph 19.2.0 managed by cephadm.
Thanks,
Nicola
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