Can you post the full output of "ceph -s", "ceph health detail, and ceph osd df tree
Also please run "ceph pg X.YZ query" on one of the PGs not backfilling.
Paul
2018-06-20 15:25 GMT+02:00 Oliver Schulz <oliver.schulz@xxxxxxxxxxxxxx>:
Dear all,
we (somewhat) recently extended our Ceph cluster,
and updated it to Luminous. By now, the fill level
on some ODSs is quite high again, so I'd like to
re-balance via "OSD reweight".
I'm running into the following problem, however:
Not matter what I do (reweigt a little, or a lot,
or only reweight a single OSD by 5%) - after a
while, backfilling simply stops and lots of objects
stay misplaced.
I do have up to 250 PGs per OSD (early sins from
the first days of the cluster), but I've set
"mon_max_pg_per_osd = 400" and
"osd_max_pg_per_osd_hard_ratio = 1.5" to compensate.
How can I find out why backfill stops? Any advice
would be very much appreciated.
Cheers,
Oliver
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Paul Emmerich
Looking for help with your Ceph cluster? Contact us at https://croit.io
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Looking for help with your Ceph cluster? Contact us at https://croit.io
croit GmbH
Freseniusstr. 31h
81247 München
www.croit.io
Tel: +49 89 1896585 90
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