We are currently in the process of spec'ing out a 2-node cluster that needs 
shared storage of some kind. The purpose is to run a CommuniGate Pro "dynamic 
cluster": http://www.communigate.com/CommuniGatePro/ClusterStorage.html

As I see it, there is two possibilities to do this: SC using "global devices" 
and QFS. Also, we could use a NAS system but that would require more funds. The 
hardware would be a StorageTek 6140 connected to both nodes and a private 
2xGigE interconnect.

My questions:

- will Sun Cluster's "global device" functionality (I think this used to be 
called PxFS) have IO throughput I need? As I see it, there is a bottleneck 
present because all IO from the non-primary node must travel via the private 
interconnect.

- is ZFS usable on "global device" under SC 3.2? (I don't think so.)

- will QFS have better IO performance than SC in this setup?

- anyone have better ways to approach this problem?

Thanks very much for your time,

Adam Sherman
 
 
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