Hi,
Today my ceph cluster suffer of such problem:
Łukasz Jagiełło
lukasz<at>jagiello<dot>org
#v+
root@dfs-s1:/var/lib/ceph/osd/ceph-1# df -h | grep ceph-1
/dev/sdc1 559G 438G 122G 79% /var/lib/ceph/osd/ceph-1
#v-
Disk report 122GB free space. Looks ok but:
#v+
root@dfs-s1:/var/lib/ceph/osd/ceph-1# touch aaa
touch: cannot touch `aaa': No space left on device
#v-
Few more of data:
#v+
root@dfs-s1:/var/lib/ceph/osd/ceph-1# mount | grep ceph-1
/dev/sdc1 on /var/lib/ceph/osd/ceph-1 type xfs (rw,noatime)
root@dfs-s1:/var/lib/ceph/osd/ceph-1# xfs_db -r "-c freesp -s" /dev/sdc1
from to extents blocks pct
1 1 366476 366476 1.54
2 3 466928 1133786 4.76
4 7 536691 2901804 12.18
8 15 1554873 19423430 81.52
total free extents 2924968
total free blocks 23825496
average free extent size 8.14556
root@dfs-s1:/var/lib/ceph/osd/ceph-1# xfs_db -c frag -r /dev/sdc1
actual 9043587, ideal 8926438, fragmentation factor 1.30%
#v-
Any possible reason of that, and how to avoid that in future ? Someone earlier mention it's problem with fragmentation but 122GB ?
Best Regards
-- Łukasz Jagiełło
lukasz<at>jagiello<dot>org
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