Getting ZFS per dataset IO statistics (or NFS per export IO statistics)

Posted by jkj on Server Fault See other posts from Server Fault or by jkj
Published on 2011-06-09T11:34:34Z Indexed on 2011/06/21 16:24 UTC
Read the original article Hit count: 501

Filed under:

solaris

|

nfs

|

zfs

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opensolaris

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openindiana

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

[edit]

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...

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