Page History

Applications and organizations using ZooKeeper include (alphabetically):

• company w/ link if available
  use

• http://www.deepdyve.com - We do search for research and provide access to high quality content using advanced search technologies
  Zookeeper is used to manage server state, control index deployment and a myriad other tasks.

• Eclipse Communication Framework - The Eclipse ECF project provides an implementation of its Abstract Discovery services using Zookeeper. ECF itself is used in many projects providing base functionallity for communication, all based on OSGi.

• katta - Katta serves distributed Lucene indexes in a grid environment.
  Zookeeper is used for node, master and index management in the grid.

• 101tec - we do consulting in the area of enterprise distributed systems.
  We use zookeeper to manage a system build out of hadoop, katta, oracle batch jobs and a web component.

• HBase - HBase is the Hadoop database. Its an open-source, distributed, column-oriented store modeled after the Google paper, Bigtable: A Distributed Storage System for Structured Data by Chang et al.
  We use ZooKeeper for master election, server lease management, bootstrapping, and coordination between servers.

• Neo4j - Neo4j is a Graph Database. It's a disk based, ACID compliant transactional storage engine for big graphs and fast graph traversals, using external indicies like Lucene/Solr for global searches.
  We use ZooKeeper in the Neo4j High Availability components for write-master election, read slave coordination and other cool stuff. ZooKeeper is a great and focused project - we like!

• Rackspace - The Email & Apps team uses ZooKeeper to coordinate sharding and responsibility changes in a distributed e-mail client that pulls and indexes data for search. ZooKeeper also provides distributed locking for connections to prevent a cluster from overwhelming servers.

• Yahoo! - ZooKeeper is used for a myriad of services inside Yahoo! for doing leader election, configuration management, sharding, locking, group membership etc.

• CXF DOSGi - The Distributed OSGi implementation at Apache CXF uses ZooKeeper for its Discovery functionality. See here for more information: http://cxf.apache.org/dosgi-discovery-demo-page.html

• Solr - In the "Cloud" edition (v1.5) of enterprise search engine Apache Solr, ZooKeeper is used for configuration, leader election and more.

• Benipal Technologies - ZooKeeper is used for internal application development with Solr and Hadoop with Hbase.

• Makara
  • Using ZooKeeper on 2-node cluster on VMware workstation, Amazon EC2, Zen
  • Using zkpython
  • Looking into expanding into 100 node cluster