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https://issues.apache.org/jira/browse/YARN-7215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16172617#comment-16172617
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Eric Yang commented on YARN-7215:
---------------------------------
Data stored in ZooKeeper can not exceed 1MB per node. It is possible for large
scale application to exceed that limit when the hostnames and config key/value
pairs are stored in the state or spec file. Application state maybe fine, but
I can't recommend to use ZooKeeper as low latency storage for application
configuration. Ambari version 0.0 (HMS) had implemented similar use case, and
it quickly hits z-node size limitation.
> REST API to list all deployed services by the same user
> -------------------------------------------------------
>
> Key: YARN-7215
> URL: https://issues.apache.org/jira/browse/YARN-7215
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: api, applications
> Reporter: Eric Yang
> Assignee: Eric Yang
>
> In Slider, it is possible to list deployed applications from the same user by
> using:
> {code}
> slider list
> {code}
> This API can help UI to display application and services deployed by the same
> user.
> Apiserver does not have ability to list all applications/services at this
> time. This API requires fast response to list all applications because it is
> a common UI operation. ApiServer deployed applications persist configuration
> in HDFS similar to slider, but using directory listing to display deployed
> application might cost too much overhead to namenode. We may want to use
> alternative storage mechanism to cache deployed application configuration to
> accelerate the response time of list deployed applications.
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