Set VMware RoundRobin PSP through PowerCLI

[jrich52352]

so perhaps im not out of my mind then. i've been noticing some of mine reverting back to most recent...

also its easier to set in 5 on,

Get-VMHost | Get-ScsiLun -CanonicalName eui* | Set-ScsiLun -MultipathPolicy RoundRobin

might need to check the canonical name on your system, or filter differently, but the set-scsilun cmdlet makes this easy

[aherbert23]

I have not seen a problem with these settings being retained after reboots so I don't believe this is an issue. I'm not setting the default PSP (as the article you linked) but a PSP rule that only affects Nimble volumes. I don't think that call is plagued by the same bug. The other settings are directly on the device and again not the same issue.

[jrich52352]

I cant say for sure if i am or not. but i could have sworn i had previous set all my paths to RR. perhaps i didnt but, this time im sure, so im going to keep an eye on it.

[Brendan Oldham]

After some research, it looks like the performance bottleneck is our Cisco 2960 switches. Apparently, they can't handle the traffic when IOPs were set to 0, so I set IOPs back to default. They perform fine in our environment (municipal government) using VMware defaults.

[wen35]

I just shameless modified Adam's script to try out esxcli storage command to list all MPIO settings/info after executing his script to change from PSP_MRU to PSP_RR & setting iops=0   it worked great - all I added was "$esxcli.storage.nmp.device.list()"

great error checking on your script Adam! 

[tcrowley96]

Brendan,

What type of performance issues were you getting as I also have Cisco 2960 switches.

I have been told the buffer size is to small on the 2960 and this increases the latency.

Tim