The setup described is all on RHEL5.6.
Fileserver filesystems are each mounted on one cluster node only
(scattered across nodes) and then NFS exported as individual services
for portability. (That exposed a major race condition with exportfs as
it's not parallel aware in any way, shape or form)
Imapserver filesystems are mounted on one node and ALL imap activity
happens on that node (hot standby)
Up to EL5.6 this has been pretty unstable, panicing regularly under load
and losing filesystem to a FC driver bug I'll describe separately.
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