Hi, I had an similiar effect two weeks ago - 1PG backfill_toofull and due reweighting and delete there was enough free space but the rebuild process stopped after a while. After stop and start ceph on the second node, the rebuild process runs without trouble and the backfill_toofull are gone. This happens with firefly. Udo On 09.01.2015 21:29, c3 wrote: > In this case the root cause was half denied reservations. > > http://tracker.ceph.com/issues/9626 > > This stopped backfills since, those listed as backfilling were > actually half denied and doing nothing. The toofull status is not > checked until a free backfill slot happens, so everything was just stuck. > > Interestingly, the toofull was created by other backfills which were > not stoppped. > http://tracker.ceph.com/issues/9594 > > Quite the log jam to clear. > > > Quoting Craig Lewis <clewis@xxxxxxxxxxxxxxxxxx>: > >> What was the osd_backfill_full_ratio? That's the config that controls >> backfill_toofull. By default, it's 85%. The mon_osd_*_ratio affect the >> ceph status. >> >> I've noticed that it takes a while for backfilling to restart after >> changing osd_backfill_full_ratio. Backfilling usually restarts for >> me in >> 10-15 minutes. Some PGs will stay in that state until the cluster is >> nearly done recoverying. >> >> I've only seen backfill_toofull happen after the OSD exceeds the >> ratio (so >> it's reactive, no proactive). Mine usually happen when I'm >> rebalancing a >> nearfull cluster, and an OSD backfills itself toofull. >> >> >> >> >> On Mon, Jan 5, 2015 at 11:32 AM, c3 <ceph-users@xxxxxxxxxx> wrote: >> >>> Hi, >>> >>> I am wondering how a PG gets marked backfill_toofull. >>> >>> I reweighted several OSDs using ceph osd crush reweight. As >>> expected, PG >>> began moving around (backfilling). >>> >>> Some PGs got marked +backfilling (~10), some +wait_backfill (~100). >>> >>> But some are marked +backfill_toofull. My OSDs are between 25% and 72% >>> full. >>> >>> Looking at ceph pg dump, I can find the backfill_toofull PGs and >>> verified >>> the OSDs involved are less than 72% full. >>> >>> Do backfill reservations include a size? Are these OSDs projected to be >>> toofull, once the current backfilling complete? Some of the >>> backfill_toofull and backfilling point to the same OSDs. >>> >>> I did adjust the full ratios, but that did not change the >>> backfill_toofull >>> status. >>> ceph tell mon.\* injectargs '--mon_osd_full_ratio 0.95' >>> ceph tell osd.\* injectargs '--osd_backfill_full_ratio 0.92' >>> >>> >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@xxxxxxxxxxxxxx >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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