[colug-432] file replication across data centers

[Christopher Cavello]

Thanks to all who responded.
I'm working with 2 datacenters > 500 miles apart, so I can't do
synchronous replication.

We are currently using rsync and cron now, but are looking for
something that might be an improvement.

After exploring gluster with geo-replication, it looks like that uses
rsync under the covers, unless you specify tar-over-ssh.