Ideally you'd use something like Performance Advisor which is part of OnCommand Unified Manager. This would show you graphical views of live and historical performance and can be configured show you could list the performance of certain volumes on a single chart.
In the absence of that you can use the stats show command on the CLI to show current performance statistics. You would do something like
filer> stats show -i 10 volume:*:total_ops volume:*:read_ops volume:*:write_ops
which would show you the per second average of all, read and write operations to each volume over a 10 second period.
There are other counters available and you can use
stats list counters volume
to see them.
Just remember that the CLI will give only live data, nothing historical.
Regards,
Warren
