Apache ZooKeeper is a distributed service that provides configuration information storage, naming, synchronization, coordination, and group services.
ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. It was inspired by Chubby, Google's distributed lock system.
All of these kinds of services are used in some form or another by distributed applications. Each time they are implemented there is a lot of work that goes into fixing the bugs and race conditions that are inevitable. Because of the difficulty of implementing these kinds of services, applications initially usually skimp on them, which makes them brittle in the presence of change and difficult to manage. Even when done correctly, different implementations of these services lead to management complexity when the applications are deployed.
ZooKeeper is used by a variety of other software projects to maintain configuration information including Apache Storm, Apache Flink, Solr Cloud, Apache Kafka and Apache Hadoop.
Links
- Documentation
- Releases
- Project Homepage
- ZooKeeper Client Bindings
- GitHub
- Chubby whitepaper - The Chubby lock service for loosely-coupled distributed systems
Related Tags
- apache-curator - Java Client Library for ZooKeeper
- apache-flink
- hadoop
- apache-kafka
- apache-storm
- etcd - a distributed key value store similar to ZooKeeper
- netflix-exhibitor - supervisor system for ZooKeeper with a UI for browsing ZK nodes
- php-zookeeper
- solrcloud
