Hi All,
What is the recommended igroup configuration for multipathed vSphere 5.x in a typical HA cluster?
Here is some information on my expected environment:
- all storage for vSphere will be FC-attached LUNs on a standard HA pair of FAS3220s (7-mode)
- my environment will be qty=3 vSphere 5.1U1 or 5.5 hosts
- each host will have two single port FC adapters named FC0 and FC1
In this environment, which of the three options I have listed below would be the recommended way to configure our igroups?
Our expected IO load is fairly low. We are therefore leaning toward implementing a fixed PSP for the sake of simplicity. Would the recommended approach of how we configure igroups be different if we wanted to implement a round-robin PSP instead?
Option A
One igroup that includes both the FC0 and the FC1 WWPNs from each host (six total members)
Map each of the vSphere datastore luns to this single igroup
Option B
An "FC0 igroup" that includes just the FC0 WWPNs from each host (three total members)
An "FC1 igroup" that includes just the FC1 WWPNs from each host (three total members)
Map each of the vSphere datastore LUNs to both the FC0 igroup and the FC1 igroups
Option C
A "Host-A igroup" that includes both of the WWPNs from my 'HostA' system (two total members)
A "Host-B igroup" that includes both of the WWPNs from my 'HostB' system (two total members)
A "Host-C igroup" that includes both of the WWPNs from my 'HostC' system (two total members)
Map each of the vSphere datastore LUNs to all three of the above igroups