replicated file system?

[Ken D'Ambrosio]

There *are* distributed filesystems -- btrfs has ceph, which has come a long,
long way. Lustre and Gluster also come to mind.  Caveat: I've not used these,
but I know folks who have, and I believe they'd fit your bill.

 -Ken 


On Tue, 28 Feb 2012 14:44:54 -0500 Kenny Lussier wrote

 Hi All, I am looking for new ideas on how to replicate file systems. I have a
need for redundant ftp servers, which could either be active/standby or
active/active, as there is a load balancer in front of them. Currently, we
periodically rsync the directory over to the standby system. What I would like
to do is have a mirrored/replicated/clustered file system so that both systems
can be active at the same time, and the data is automagically available on
either, even in the event that one server fails. The catch is that there is no
back-end shared storage (no SAN, NFS, etc.). I thought about drbd, but that is
active/backup only. Most other systems required shared storage. I'm looking at
using incron/inotify or Unison, but I was curious to see how other people
would creatively solve this problem. Ideas?
 TIA,
 Kenny