The app slaves will monitor the health of the app master and if the master fails, the slaves will use a quorum vote in order for one of them to get a lock. The slave that gets the lock will steal the IP address, become the new master and will kill the old master server.
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InfoQ: Flex: Engine Yard’s New Cloud Offering
Interesting approach to load-balancing instead of the usual “1 master + 1 failover-master + N slaves” setup.
