Yes, this is a strong guarantee: http://hadoop.apache.org/zookeeper/docs/current/zookeeperProgrammers.html#ch_zkGuarantees
Sync is only necessary if client A makes a change, then client B wishes to read that change with guarantee that it will see the successfully applied change previously made by A (this is typically only an issue if A & B communicate through some non-zk channel, such as direct socket connection btw A & B).
Patrick Marc Frei wrote:
Dear ZooKeeper users, a short question about ZooKeeper's consistency model: Does ZooKeeper support "read-your-writes consistency"? E.g., after having created a node, will the same client always find the newly created node via getChildren? If yes, is this specified behavior the client can rely on? Or is it better to always call sync in order to enforce consistency? Thanks in advance and kind regards, Marc