hadoop/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/registry/index.md

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# YARN Service Registry
The Service registry is a service which can be deployed in a Hadoop cluster
to allow deployed applications to register themselves and the means of
communicating with them. Client applications can then locate services
and use the binding information to connect with the services's network-accessible
endpoints, be they REST, IPC, Web UI, Zookeeper quorum+path or some other protocol.
Currently, all the registry data is stored in a zookeeper cluster.
* [Architecture](yarn-registry.html)
* [Configuration](registry-configuration.html)
* [Using the YARN Service registry](using-the-yarn-service-registry.html)
* [Security](registry-security.html)