zfs - checking your zpool throughput
This is quite a good diagnostic for checking your disk throughput. Try copying data to and from your zpool while your running this command on the host…
zpool iostat -v unprotected 2
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
unprotected 1.39T 668G 18 7 1.35M 161K
c7d0 696G 403M 1 2 55.1K 21.3K
c9d0 584G 112G 8 2 631K 69.3K
c7d1 141G 555G 8 2 697K 70.0K
---------- ----- ----- ----- ----- ----- -----
The above command will keep displaying the above output every 2 seconds (average during that time). I’ve used it a few times to ensure that all disks are being used (in write operations) where needed. Of course read op’s may not be typically across all disks as it will depend where the data is…