hi there, while debugging metadata servers reporting slow requests, we took a stab at pinning directories of a cephfs like so:
setfattr -n ceph.dir.pin -v 1 /tubfs/kubernetes/
setfattr -n ceph.dir.pin -v 0 /tubfs/profiles/
setfattr -n ceph.dir.pin -v 0 /tubfs/homes
on the active mds for rank 0, we can see all pinnings like expected:
ceph daemon /var/run/[rank0].asok get subtrees | jq -c
'.[]|select(.dir.path|contains("/"))|[.dir.path, .export_pin, .auth_first]'
["/kubernetes",1,1]
["/homes",0,0]
["/profiles",0,0]
while the active mds for rank 1 reports back its own pinnings only:
ceph daemon /var/run/[rank1].asok get subtrees | jq -c
'.[]|select(.dir.path|contains("/"))|[.dir.path, .export_pin, .auth_first]'
["/kubernetes",1,1]
["/.ctdb",-1,1]
is this to be expected? anecdotical data indicate that the pinning does
work as intended.
thank you very much & with kind regards,
thoralf.
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