Self-follow-up:
The ceph version is 0.80.11 in the cluster I'm working. So quite old.
Adding:
admin socket = /var/run/ceph/$cluster-$type.$id.$pid.$cctid.asok
log file = /var/log/ceph/
to /etc/ceph.conf, and then in my case tweaking apparmor (for test
disabling it):
service apparmor
Dear fellow cephalopods,
does anyone have any pointers on how to instrument librbd as-driven-by
qemu IO performance from a hypervisor?
Are there less intrusive ways than perf or equivalent? Can librbd be
told to dump statistics somewhere (per volume) - clientside?
This would come in real handy
