iotop for iSCSI or zfs datasets

[Eugene M. Zheganin]

Hello,

On 07.12.2018 20:25, Alan Somers wrote:
>
>> I also can see the iotop in the context of network data transferred
>> using trafshow, but this doesn't scale well to iops, and I would see
>> reads/writes per second in terms that block devices use.
>>
>>
>> Thanks.
>>
>> Eugene.
> What's wrong with gstat?  Use "gstat -a" to suppress idle devices.
> -Alan

Everything is wrong with gstat in this case.

First of all, this is what's wrong - 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227465 , and gstat 
required zvols to be volmode=geom to use it this way.

Second, volmode=dev is supposed to be more performing.

Finally, I find hilarious that first answer in the dtrace@ was "don't 
use dtrace".

Eugene.