backfill / recover logic (OSD included as selection criterion)

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Hi,

Is there any logic / filtering which PGs to backfill at any given time
that takes into account the OSD the PG is living on?

Our cluster is backfilling a complete pool now (512 PGs) and (currently)
of the 7 active+remapped+backfilling there are 4 of them on the same
OSD. Which stresses this OSD way more than needed. It would be nice if
the selection criteria for which PG to backfill (and / or recover) from
would include the OSD as selection criterion in order to spread the load
across different OSDs.

Gr. Stefan



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