Apache ZooKeeper

Apache ZooKeeper
Developer(s) Apache Software Foundation
Stable release
3.4.9 / September 3, 2016 (2016-09-03)
Written in Java
Operating system Cross-platform
Type Distributed computing
License Apache License 2.0
Website zookeeper.apache.org

Apache ZooKeeper is a software project of the Apache Software Foundation. It is essentially a distributed hierarchical key-value store, which is used to provide a distributed configuration service, synchronization service, and naming registry for large distributed systems.[1] ZooKeeper was a sub-project of Hadoop but is now a top-level project in its own right.

ZooKeeper's architecture supports high availability through redundant services. The clients can thus ask another ZooKeeper leader if the first fails to answer. ZooKeeper nodes store their data in a hierarchical name space, much like a file system or a tree data structure. Clients can read from and write to the nodes and in this way have a shared configuration service. Updates are totally ordered.[2]

ZooKeeper is used by companies including Rackspace, Yahoo!,[3] Odnoklassniki, Reddit[4] and eBay as well as open source enterprise search systems like Solr.[5]

Typical use cases

See also

References

  1. ↑ "Index - Apache ZooKeeper - Apache Software Foundation". cwiki.apache.org. Retrieved 2016-08-26.
  2. ↑ "Zookeeper Overview".
  3. ↑ "ZooKeeper/Powered By".
  4. ↑ "Why Reddit was down on Aug 11".
  5. ↑ "SolrCloud".

External links

This article is issued from Wikipedia - version of the 11/3/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.