Interesting, I re-read the vmware/3par recommendations and they mention 8 paths from a host to a datastore in it. I have always understood it as 4 as you can run into overhead, but that may be because of this:
"When configuring an HP 3PAR StoreServ Storage for use in a VMware vSphere environment, it is important to follow the recommendations for the maximum number of host server ports per HP 3PAR StoreServ Storage target ports, 128 Fibre Channel host initiators per 8Gb port and 64 iSCSI/FCoE host initiators per port."
We are actually not far off from hitting the 128 FC connections per host port as we are creeping up on 256 hosts and only have 16 FC host ports on this array.
I am curious what others have ran into or found works best? We have 2 arrays going to each esxi host and I assumed 4 paths per array was adequate, but maybe it is time to re-evaluate this?
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