Status of Cyrus replication

[Blake Hudson]

Hey all, last time I checked replication was undergoing major overhauls 
and incompatibility between minor versions of 2.3.x was pretty great. 
There were also a few bugs that could potentially cause trouble down the 
road. I've had the need to create setups with failover servers and have 
continued using rsync on an interval (~30 to 60 min) for this purpose. 
Unfortunately this causes quite a lot of IO load on the servers and I 
was hoping that a rolling replication setup would help resolve this.

What's the status of Cyrus replication in the latest releases of 2.3.x - 
specifically with virtual domains enabled?

It also seems like there have been some problems with the latest 
releases of 2.3 and I'm hesitant to upgrade my 99% working 2.3.1 
install. Any lingering issues or reason not to upgrade?

For those who have the need to create a "hot spare" server and are not 
using Cyrus replication, what method are you guys using to accomplish 
this goal?

Thanks,
--Blake