2013/10/22 HURTEVENT VINCENT <vincent.hurtevent@xxxxxxxxxxxxx>
Hello,
we're using a small Ceph cluster with 8 nodes, each 4 osds. People are using it through instances and volumes in a Openstack platform.
We're facing a HEALTH_ERR with full or near full osds :
cluster 5942e110-ea2f-4bac-80f7-243fe3e35732
health HEALTH_ERR 1 full osd(s); 13 near full osd(s)
monmap e1: 3 mons at {0=192.168.73.131:6789/0,1=192.168.73.135:6789/0,2=192.168.73.140:6789/0}, election epoch 2974, quorum 0,1,2 0,1,2
osdmap e4127: 32 osds: 32 up, 32 in full
pgmap v6055899: 10304 pgs: 10304 active+clean; 12444 GB data, 24953 GB used, 4840 GB / 29793 GB avail
mdsmap e792: 1/1/1 up {0=2=up:active}, 2 up:standby
Here is the dd output on these osds :
/dev/sdc 932G 785G 147G 85% /data/ceph/osd/data/1
/dev/sdd 932G 879G 53G 95% /data/ceph/osd/data/2
/dev/sde 932G 765G 167G 83% /data/ceph/osd/data/3
/dev/sdf 932G 754G 178G 81% /data/ceph/osd/data/4
/dev/sdc 932G 799G 133G 86% /data/ceph/osd/data/6
/dev/sdd 932G 818G 114G 88% /data/ceph/osd/data/7
/dev/sde 932G 814G 118G 88% /data/ceph/osd/data/8
/dev/sdf 932G 801G 131G 86% /data/ceph/osd/data/9
/dev/sdc 932G 764G 168G 83% /data/ceph/osd/data/11
/dev/sdd 932G 840G 92G 91% /data/ceph/osd/data/12
/dev/sde 932G 699G 233G 76% /data/ceph/osd/data/13
/dev/sdf 932G 721G 211G 78% /data/ceph/osd/data/14
/dev/sdc 932G 778G 154G 84% /data/ceph/osd/data/16
/dev/sdd 932G 820G 112G 88% /data/ceph/osd/data/17
/dev/sde 932G 684G 248G 74% /data/ceph/osd/data/18
/dev/sdf 932G 763G 169G 82% /data/ceph/osd/data/19
/dev/sdc 932G 757G 175G 82% /data/ceph/osd/data/21
/dev/sdd 932G 715G 217G 77% /data/ceph/osd/data/22
/dev/sde 932G 762G 170G 82% /data/ceph/osd/data/23
/dev/sdf 932G 728G 204G 79% /data/ceph/osd/data/24
/dev/sdc 932G 841G 91G 91% /data/ceph/osd/data/26
/dev/sdd 932G 795G 137G 86% /data/ceph/osd/data/27
/dev/sde 932G 691G 241G 75% /data/ceph/osd/data/28
/dev/sdf 932G 772G 160G 83% /data/ceph/osd/data/29
/dev/sdc 932G 738G 195G 80% /data/ceph/osd/data/36
/dev/sdd 932G 803G 129G 87% /data/ceph/osd/data/37
/dev/sde 932G 783G 149G 85% /data/ceph/osd/data/38
/dev/sdf 932G 844G 88G 91% /data/ceph/osd/data/39
/dev/sdc 932G 885G 47G 96% /data/ceph/osd/data/31
/dev/sdd 932G 708G 224G 76% /data/ceph/osd/data/32
/dev/sde 932G 802G 130G 87% /data/ceph/osd/data/33
/dev/sdf 932G 862G 70G 93% /data/ceph/osd/data/34
Some osds are really nearly full whereas some are ok I think (below 80%).
Wer're losing GBs we thought usable. There is no custom CRUSHmap,
Is there a way to rebalance data between osds ? As I understand the documentation, we should do this by adding new osd(s), switch off highly used osd to force the cluster to rebuild data.
Is there a way to do this without addind osds ? We 're using ceph version 0.67.1.
Thank you,
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С уважением, Фасихов Ирек Нургаязович
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