Does ZooKeeper support transactions?

ZooKeeper is a distributed coordination service that does not directly support transactions. Its main purpose is to coordinate and manage node status information in distributed systems, offering features like distributed locks and leader election.

In order to implement transactions on ZooKeeper, you can achieve transaction control at the application layer by utilizing ZooKeeper’s atomic operations. For instance, you can use ZooKeeper’s node version numbers to implement optimistic locking, or create temporary nodes on ZooKeeper to implement distributed transactions.

Additionally, some distributed databases or systems like HBase, Kafka, etc. also use ZooKeeper as a coordination service, which may implement transaction functionality on their own, but it is not directly related to ZooKeeper itself.