[Dovecot] HA Dovecot Config?

[Eric Rostetter]

Quoting Rick Romero <rick at havokmon.com>:

> They claim to be real-time, and with kernel hooks into reads/writes,  
> it seems promising to run on top of the OS..

Yes, but that doesn't mean it will work in the cluster environment...

It also says things like:

> There are different types of file locks.  In addition to these differences,
> each OS has its own set of rules regarding file locks as well.  FRP's
> replication of locked files will vary in relation to the way the OS treats
> these types.  However, one rule is consistent throughout all operating
> systems in that exclusive file locks will prevent FRP from replicating data.

See that last line there???  Want to bet something in the mail setup
(MTA, dovecot, system jobs like backup, etc) put an exclusive lock on
files from time to time?

Again, a fine backup system, and depending on your needs it might be
okay for a failover setup, but not for an active-active setup.  For
that you need a lock manager, which they promise "in the future" but
don't deliver yet...

> Rick

-- 
Eric Rostetter
The Department of Physics
The University of Texas at Austin

Go Longhorns!