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

How about this... In this instance I have a ZFS filesystem '/volumes/lab3_pool_a/data02/alpha/' and I am using fsstat to get some basic statistics about it. Notice, I am getting stats for both, ZFS as a whole, and this one filesystem. By the way, fsstat has some good options and may give you just what you need.

# fsstat zfs /volumes/lab3_pool_a/data02/alpha/ 1

 new  name   name  attr  attr lookup rddir  read read  write write
 file remov  chng   get   set    ops   ops   ops bytes   ops bytes
    0     0     0    27     0     27     0     0     0     1   208 zfs
    0     0     0     0     0      0     0     0     0     0     0 /volumes/lab3_pool_a/data02/alpha

Adding to slashdot's comments above: this one-liner does the same thing over all ZFS datasets (as determined by the pattern of the device column in mount(1M) output:

fsstat -i `mount | awk '{if($3 ~ /^[^\/:]+\//) {print $1;}}'` 1