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https://issues.apache.org/jira/browse/YARN-2520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhijie Shen resolved YARN-2520.
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Resolution: Duplicate
Close it as the duplicate of YARN-2928, as TS next gen will cover this topic
> Scalable and High Available Timeline Server
> -------------------------------------------
>
> Key: YARN-2520
> URL: https://issues.apache.org/jira/browse/YARN-2520
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Affects Versions: 3.0.0, 2.5.0
> Reporter: Zhijie Shen
> Assignee: Zhijie Shen
> Attachments: Federal Timeline Servers.jpg
>
>
> YARN-2032 will provide a scalable and reliable timeline store based on HBase.
> However a single instance of the timeline server is not scalable enough to
> handle a large volume of user requests, being the single bottleneck.
> As the timeline server is the stateless machine, it's not difficult to start
> multiple timeline server instances and write into the same HBase timeline
> store. We can make use of Zookeeper to register all the timeline servers, as
> HA RMs do, and client can randomly pick one server to publish the timeline
> entities for load balancing.
> Moreover, since multiple timeline servers are started together, they are
> actually back up each other, solving the high availability problem as well.
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