I have 19 pages that are stuck unclean (see below result of ceph -s). This occurred after I executed a "ceph osd reweight-by-utilization 108" to resolve problems with "backfill_too_full" messages, which I believe occurred because my OSDs sizes vary significantly in size (from a low of 600GB to a high of 3 TB). How can I get ceph to get these pages out of stuck-unclean? (And why is this occurring anyways?) My best guess of how to fix (though I don't know why) is that I need to run:
ceph osd crush tunables optimal. However, my kernel version (on a fully up-to-date Centos 6.5) is 2.6.32, which is well below the minimum required version of 3.6 that's stated in the documentation (http://ceph.com/docs/master/rados/operations/crush-map/) -- so if I must run "ceph osd crush tunables optimal" to fix this problem, I presume I must upgrade my kernel first, right?...Any thoughts or am I chasing the wrong solution -- I want to avoid kernel upgrade unless it's needed.) ===================== [root@ia2 ceph4]# ceph -s cluster 14f78538-6085-43f9-ac80-e886ca4de119 health HEALTH_WARN 19 pgs backfilling; 19 pgs stuck unclean; recovery 42959/5511127 objects degraded (0.779%) monmap e9: 3 mons at {ia1= 192.168.1.11:6789/0,ia2=192.168.1.12:6789/0,ia3=192.168.1.13:6789/0}, election epoch 496, quorum 0,1,2 ia1,ia2,ia3 osdmap e7931: 23 osds: 23 up, 23 in pgmap v1904820: 1500 pgs, 1 pools, 10531 GB data, 2670 kobjects 18708 GB used, 26758 GB / 45467 GB avail 42959/5511127 objects degraded (0.779%) 1481 active+clean 19 active+remapped+backfilling client io 1457 B/s wr, 0 op/s [root@ia2 ceph4]# ceph -v ceph version 0.72.2 (a913ded2ff138aefb8cb84d347d72164099cfd60) [root@ia2 ceph4]# uname -r 2.6.32-431.3.1.el6.x86_64 ====
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