MSA2012i -- MRU or round robin, which is better??

[tlyczko]

We have an MSA2012i with our vSphere 4.x cluster and software iSCSI.

It presently uses MRU, would anything be gained by changing this to round robin for each host/VM??

I can test on 1 host / VM to start...

Thank you, Tom

[weinstein5]

Both should be the same since you are using the software iSCSI initiator there is only a single path out of the ESX host - round robins benefits come when there are multiple HBAs in your ESX host -

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[tlyczko]

When there's only one HBA the only useful option is MRU??

I guess you put the question to bed pretty quickly.

If it makes any difference, I forgot to say that it is a dual-controller SAN.

Thank you, Tom

[binoche]

MRU is also OK when only one HBA, since you can add multi nics and port binding; and if you have multi luns on storage, you can still select different nics for different luns;

round robin? I suggest to contact HP, for me, round robin maybe can not help for the performance here

binoche, VMware VCP, Cisco CCNA