EVA 8100 preferred path settings with Windows 2008 cluster

[Jeremy C]

EVA 8100, XCS 6.220
Command View EVA 9.3

With a Windows 2008 cluster (5 servers) and a bunch of vdisks presented to all 5 servers, what would be the recommended preferred path for the vdisks?

Currently some are set to "path A-failover/failback" and some are "path B-failover/failback". Would that cause any problems?

[Steven Clementi · Accepted solution]

No. This setting simply tells the EVA which controller is "managing" the virtual disk for pathing and load balancing purposes.

You should be fine, but if you do a little digging you can probably tweak the path setting by figuring out which disks are getting hit harder (more i/o) to them and making sure those are split as evenly as possible. (if not already split)

Just because you have 10 disks, 5 on a and 5 on b does not mean it's optimal. The 5 on a might have heavy I/O loads while the 5 on b have lesser loads.


Steven