I am trying to build a nice failover system for random parts of our infrastructure. Does anyone know how to force mailman to replicate changes over to another identically configured system?

I thought about using rsync for this but I am trying to keep the sync triggered by updates on the primary server rather than just seeing if in the last few minutes any files have changed. Ideally I would like to round robin the primary and the secondary to split the load up, but I cannot do that without being sure that they are kept in sync with each other.

How close to possible is this idea? Is there something I should read? I checked the FAQ and didn't see anything...

Pat