I don't know... sounds like they just shifted the 'single point of failure' to the Zookeeper cluster. Is it somehow sexier to have your SPOF be things running Zookeeper instead of things running loadbalancer or DNS software?:
"The achilles heel of SmartStack is Zookeeper. Currently, the failure of our Zookeeper cluster will take out our entire infrastructure. Also, because of edge cases in the zk library we use, we may not even be handling the failure of a single ZK node properly at the moment."
"The achilles heel of SmartStack is Zookeeper. Currently, the failure of our Zookeeper cluster will take out our entire infrastructure. Also, because of edge cases in the zk library we use, we may not even be handling the failure of a single ZK node properly at the moment."