Zhijie Shen created YARN-2520:
Summary: Scalable and High Available Timeline Server
Project: Hadoop YARN
Issue Type: Sub-task
Affects Versions: 2.5.0, 3.0.0
Reporter: Zhijie Shen
Assignee: Zhijie Shen
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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