Hi Andras.
Assuming that you've already tightened the
mgr/balancer/upmap_max_deviation to 1, I suspect that this cluster
already has too many upmaps.
Last time I checked, the balancer implementation is not able to
improve a pg-upmap-items entry if one already exists for a PG. (It can
add an OSD m
Hi again,
Oops, I'd missed the part about some PGs being degraded, which
prevents the balancer from continuing.
So I assume that you have PGs which are simultaneously
undersized+backfill_toofull?
That case does indeed sound tricky. To solve that you would either
need to move PGs out of the tooful
Den fre 2 apr. 2021 kl 11:23 skrev Dan van der Ster :
>
> Hi again,
>
> Oops, I'd missed the part about some PGs being degraded, which
> prevents the balancer from continuing.
> any upmaps which are directing PGs *to* those toofull OSDs. Or maybe
> it will be enough to just reweight those OSDs to 0
Lowering the weight is what I ended up doing. But this isn't ideal
since afterwards the balancer will remove too many PGs from the OSD
since now it has a lower weight. So I'll have to put the weight back
once the cluster recovers and the balancer goes back to its business.
But in any case -
