I have 4 servers all of which I plan on installing oes linux. I was thinking that I could make 2 servers into cluster nodes and the other two into file servers for shared storage with mirrored nss volumes to use as the shared storage for the cluster nodes. I had planned on putting one of each in a building for disaster proofing, and this is going to be dns and dhcp only.

My second thought would be to make 2x2 clusters one for dns and the other for dhcp without shared storage and use iscsi between the two like I did in Netware.

Any opinions on where I should be going with this?

Thanks in advance.