Hello RBD users,
Would you mind running this command on a random OSD on your RBD-oriented
cluster?
ceph-objectstore-tool \
--data-path /var/lib/ceph/osd/ceph-NNN \
'["meta",{"oid":"snapmapper","key":"","snapid":0,"hash":2758339587,"max":0,"pool":-1,"namespace":"","max":0}]' \
list-omap | wc -l
...and share the number of lines along with the overall size and
utilization % of the OSD? The OSD needs to be stopped, then run that
command, then start it up again.
I'm trying to guage how much snapmapper metadata there is in a "typical"
RBD environment. If you have some sense of whether your users make
relatively heavy or light use of snapshots, that would be helpful too!
Thanks!
sage
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