burke/multi_db — pull request #13 by burke (2012-11-19 17:12:21+00:00)
Title: Removed LagMonitor

@hornairs @camilo @boourns

Ramifications of this:

1) Slaves are no longer blacklisted for their replica lag being too high. Slaves can now exist in the pool with arbitrarily high replica lag. Similarly, slaves with replication disabled entirely will also serve queries.

2) Sessions are only and always stickied to the master for 5 minutes. This means that if someone writes data, then doesn't do anything for 5 minutes, and the slave is lagged > 5 minutes, they won't see their data after.