Indeed that looks pretty idle to me.
But if you have two active MDSs, then the load is probably caused by
the MD balancing continuously migrating subdirs back and forth between
each other in an effort to balance themselves -- we've seen this
several times in the past and is why we use pinning.
Each
This output seems typical for both active MDS servers:
---mds --mds_cache--- --mds_log--
-mds_mem- ---mds_server--- mds_ -objecter-- purg
req rlat fwd inos caps exi imi |stry recy recd|subm evts segs repl|ino dn
|hcr hcs hsr cre cat |ses
Hi,
That's interesting -- yes on a lightly loaded cluster the metadata IO
should be almost nil.
You can debug what is happening using ceph daemonperf on the active
MDS, e.g. https://pastebin.com/raw/n0iD8zXY
(Use a wide terminal to show all the columns).
Normally, lots of md io would indicate t
