Hi,
On 11/17/2016 08:07 AM, Steffen Weißgerber wrote:
Hello,
just for understanding:
When starting to fill osd's with data due to setting the weigth from 0 to the normal value
the ceph status displays degraded objects (>0.05%).
I don't understand the reason for this because there's no storage revoekd from the cluster,
only added. Therefore only the displayed object displacement makes sense.
If you just added a new OSD, a number of PGs will be backfilling or
waiting for backfilling (the remapped ones). I/O to these PGs is not
blocked, and thus object may be modified. AFAIK these objects show up as
degraded.
I'm not sure how ceph handles these objects, e.g. whether it writes them
to the old OSDs assigned to the PG, or whether they are put on the new
OSD already, even if the corresponding PG is waiting for backfilling.
Nonetheless the degraded objects will be cleaned up during backfilling.
Regards,
Burkhard
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