[Pacemaker] One Cluster or Two

[Art Zemon]

Folks,

I am building a high availability web hosting platform which will
include a pair of web servers with an OCFS2 shared filesystem and a
MySQL database server with a backup (using a DRBD-based filesystem
instead of MySQL replication). Does this sound like one cluster or two
(one for the web servers and a second for the database servers)?

If one cluster, each configuration is very very simple.

If two clusters, the config is more complex because it has everything in
it for all resources, plus location constraints. But it can have a real
quorum since the full cluster will be at least four nodes.

Thoughts?

Thanks,
    -- Art Z.