Web servers are mostly read-only, so unless your web servers are going to do a lot of writing to shared storage I would simply use rsync to a local disk in each server, or use NFS, even NFS and heartbeat for redundancy will be 100 times simpler to setup and maintain.
GFS/OCFS2/Gluster/Lustre are really for multi-writers to shared storage such as a large NFS server cluster (4-8-16 nodes) serving thousands of clients for general file services, not thousands of clients accessing shared storage directly.
It's a good point. Thanks for making it. OCFS2 seems like a pain to maintain with new rpm's for each new kernel update, and GFS a pain to setup at the least.
We just want scalability for future hosting options; it seems like GFS is the most powerful option. But you're right that there is not a lot of writing going on and NFS is probably the best option.
-Ross
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