Introducing Doozer – Keith Rarick

We need a consistent, highly-available data store.1 There is no shortage of tools that provide one of these properties or the other. For example, mysql, postgres, and redis provide consistency but not high availability; riak, couchdb, and redis cluster (when it’s ready) provide high availability but not consistency. The only freely-available tool that attempts to provide both of these is zookeeper

[kuenishi]

I can't imagine how doozer realizes locks without heartbeating clients. Does this really work???