http://hadoop.apache.org/zookeeper/docs/r3.3.1/zookeeperAdmin.html#sc_dataFileManagement says that one can copy the contents of the data directory and use it on another machine. The example states the other instance is not in the server list; what would happen if one did copy it to an offline member of the quorum that then starts up?
Do the docs imply that one can copy the data directory as-is as a backup method? Is it "restorable" to any crashed/hosed server, or only the one with the same server id? What is a valid backup method for zk data? .. Adam