We have been testing a new installation of ceph (mimic 13.2.2) mostly
using cephfs (for now). The current test is just setting up a filesystem
for backups of our other filesystems. After rsyncing data for a few
days, we started getting this from ceph -s:
health: HEALTH_WARN
1 MDSs report slow metadata IOs
1 MDSs behind on trimming
I have been googling for solutions and reading the docs and the
ceph-users list, but I haven't found a way to get rid of these messages
and get back to HEALTH_OK. Some of the things I have tried (from
suggestions around the internet):
- Increasing the amount of RAM on the MDS server (Currently 192 GB)
- Increasing mds_log_max_segments (Currently 256)
- Increasing mds_cache_memory_limit
The message still reports a HEALTH_WARN. Currently, the filesystem is
idle, no I/O happening. Not sure what to try next. Any suggestions?
Thanks in advance!
Jorge
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