Hi all,
Ceph Nautilus 14.2.16.
We encounter a strange and critical poblem since this morning.
Our cephfs metadata pool suddenly grew from 2,7% to 100%! (in less than
5 hours) while there is no significant activities on the OSD data !
Here are some numbers:
# ceph df
RAW STORAGE:
CLASS SIZE AVAIL USED RAW USED %RAW USED
hdd 205 TiB 103 TiB 102 TiB 102 TiB 49.68
nvme 4.4 TiB 2.2 TiB 2.1 TiB 2.2 TiB 49.63
TOTAL 210 TiB 105 TiB 104 TiB 104 TiB 49.68
POOLS:
POOL ID PGS STORED OBJECTS
USED %USED MAX AVAIL
cephfs_data_home 7 512 11 TiB 22.58M 11
TiB 18.31 17 TiB
cephfs_metadata_home 8 128 724 GiB 2.32M 724
GiB 100.00 0 B
rbd_backup_vms 9 1024 19 TiB 5.00M 19
TiB 37.08 11 TiB
The cephfs_data uses less than the half of the storage space, and there
was no significant increase during the period (and before) where
metadata became full.
Is someone already encounter that ?
Currently, I have no idea how I can solve this problem. The restart of
associated OSD and mds services have not been useful.
Let me know if you want more informations or logs.
Thank you for your help.
Regards,
Hervé
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