Where do I find statistics about how IO is divided between zfs datasets? (zpool iostat only tells me how much IO a pool is experiencing.)
All the relevant datasets are used through NFS, so I'd be happy with per export NFS IO statistics also.
We're currently running OpenIndiana
It seems that operation and byte counter are available in kstat
kstat -p unix:*:vopstats_??????? ... unix:0:vopstats_2d90002:nputpage 50 unix:0:vopstats_2d90002:nread 12390785 ... unix:0:vopstats_2d90002:read_bytes 22272845340 unix:0:vopstats_2d90002:readdir_bytes 477996168 ...
...but the strange hexadecimal ID numbers have to be resolved from
/etc/mnttab (better ideas?)
rpool/export/home/jkj /export/home/jkj zfs rw,...,dev=2d90002 1308471917
Now writing a munin plugin to use the data...