[TriLUG] Replicating a filesystem across datacenters

[Alan Porter]

There are filesystem solutions (someone mentioned GlusterFS).

There are also block-level solutions like DRBD.  And I seem
to remember a discussion way back in TriLUG where Jason
Tower set up two machines to do software RAID over a WAN.

I think DRBD and RAID are both "active-standby" solutions,
with some procedure for failover.  They are not multi-active.

Alan