Posted on 2011-04-26
I am currently working on a DR setup for my vmware environment. What I have;
2* HP EVA sans
x* ESXi 4.1 installations
The SANs are set up with synchronous mirroring from the primary site to the DR site. There are no "smart" devices in front of the SAN except for FC switches. The plan is running everything 100%/0% and should the primary site go down the DR site will become active.
I have thought of a few ideas such as adding the DR hosts to the vCenter installations(should I have 2?). Since the SAN does all the syncing of data, I could basically just make the DR hosts see the same datastores as the hosts in the primary site, but on the DR SAN and not the primary SAN?
Will for example a DR host connected to the DR SAN(including a few datastores) understand that the primary host connected to the primary SAN(including a few datastores) sees the same datastore or will they be "confused" because of differences on LUN's etc?
I have had a look on vmware SRM, but I am not sure whether I need that application or not.
I assume that if I had a device in front of the SAN that said "Hi, you dont need to know what SAN you are talking to - I am doing that work and it doesn't matter if you connect to the primary or DR san" would make it easier for hosts to understand(reference to IBM storage volume controller".
Anyone here with ideas on how these things work? As you may have noticed I am not much of a SAN technician, so I would very much appreciate your thoughts.