how to change PSP Roundrobin IOPS to 1 for all the LUNs per storage array basis

what is PSP round robin IOPS? and why do we need to change?

refer to this for answer http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2069356

above KB, VMware mentioned to change the IOPS to 1 per device basis. but below I'm going to show you how easily we can change for the per storage array basis ( which mean if you have LUNs that all provisioned from  one storage array, you don't need to go and change it in all the LUN one by one and you can do it all in one command as below)

make sure this is only applies to Round robin PSP

1) find out you array vendor and Model

execute #~ # esxcli storage core device list and it will show the list of attached LUNs(devices)




from there you may find out the storage vendor and model





2) find out the SATP and the PSP that been used by this storage model











if the model is different or it uses different PSP, you need to change accordingly

3) now exe cute below command for the change

# esxcli storage nmp satp rule add -s “satpname” -V “vendorname” -M “modelnme” -P “VMW_PSP_RR” -O “iops=1″

for my case, I have executed as below


after that the IOPS changed to 1

before the change:
after the change