Real World Use of Zookeeper [closed]

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I've been looking at Zookeeper recently and wondered whether anybody was using it currently and what they were specifically using it for storing.

The most common use case is for configuration information, but what kind of data and how much data are you storing?

Answer 1

Free Software Projects Powered by ZooKeeper:

• AdroitLogic UltraESB
• Akka
• Eclipse Communication Framework
• Eclipse Gyrex
• GoldenOrb
• Juju
• Katta
• KeptCollections
• Mesos
• Neo4j
• Norbert
• Talend ESB
• redis_failover

Apache Projects Powered by ZooKeeper:

• Apache Accumulo
• Apache BookKeeper
• Apache CXF DOSGi
• Apache Flume
• Apache Hadoop MapReduce
• Apache HBase
• Apache Hedwig
• Apache Kafka
• Apache S4
• Apache Solr

Source: https://cwiki.apache.org/confluence/display/ZOOKEEPER/PoweredBy

Answer 2

Neo4j uses Zookeeper their High Availability enterprise server! http://docs.neo4j.org/chunked/milestone/ha.html

Answer 3

Zookeeper was used for many things other than configuration. Here is a official list of implement distributed primitives using zookeeper.

https://zookeeper.apache.org/doc/current/recipes.html

Answer 4

Solr is also working to integrate ZooKeeper. Here you can see they are using for dynamic config, sharding, SPOF elimination (master/slave election), rebalancing, etc.

Answer 5

datomic uses apache zookeeper to manage riak based data storage.

Because Riak supports only eventual consistency at this time, a Datomic system running on Riak also utilizes Apache ZooKeeper, a highly-available coordination service. Datomic uses ZooKeeper for transactor failover coordination, and for the handful of keys per database that need to be updated with CAS. source: http://blog.datomic.com/2012/11/riak-and-couchbase-support.html

Answer 6

In my case we are storing configuration files in zookeeper ensemble for cluster usage . We are using leader -> follower schema . So when one zookeeper down we are switched for another one (replicated mode)