[OmniOS-discuss] iSCSI traffic suddenly comes to a halt and then resumes

[Anon]

Hi Matej,

Do you have sar running on your system? I'd recommend maybe running it at a
short interval so that you can get historical disk statistics. You can use
this info to rule out if its the disks or not. You can also use iotop -P to
get a real time view of %IO to see if it's the disks. You can also use
zpool iostat -v 1.

Also, do you have baseline benchmark of performance and know if you're
meeting/exceeding it? The baseline should be for random and sequential IO;
you can use bonnie++ to get this information.

Are you able to share your ZFS configuration and iSCSI configuration?

For iSCSI, can you take a look at this:
http://docs.oracle.com/cd/E23824_01/html/821-1459/fpjwy.html#fsume

Do you have detailed logs for the clients experiencing the issues? If not
are you able to enable verbose logging (such as debug level logs)?

Regards,
Anon
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