NetApp and Nimble Queue Depths

[sferguson524]

Greetings all!

We're running a nimble and NetApp SAN over iSCSI to 10 esxi 6.5 UCS hosts.  Have a queue depth of 128 set on the iscsi HBAs.  We're seeing a bunch of iSCSI aborts here and there, coupled with vmkernel latency.  I know if i increase the Q depth to 256, the aborts will go down, but have concerns about high wait time and latency on vmkernel.. Any suggestions?

[mhampto]

You can use the information in Using esxtop to identify storage performance issues for ESX / ESXi (multiple versions) (1008205) to see the difference in latency between the settings. Also check Performance Best Practices for VMware vSphere 6.5  for any possible configuration issues.

[Rob Bishop]

With the Nimble option I would suggest you raise a support call, you'll get an answer really quickly and will give you the comfort that it's a supported option