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From "Varun Saxena (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6105) Support for new REST end point /clusterids
Date Mon, 23 Jan 2017 13:00:28 GMT

    [ https://issues.apache.org/jira/browse/YARN-6105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834435#comment-15834435

Varun Saxena commented on YARN-6105:

bq. I discussed with cloud team today, constant clusterId or storing it separately as info
does not work for them.
Hmm...Trying to understand the issue better. What issues do they face if they publish entities
with a constant cluster ID across the cloud ? Is there any advantage in differentiating between
different ephemeral clusters ?
Assuming that for cloud scenario a constant cluster is not to be given,  if we want a list
of all cluster IDs', I guess we would need it at real time. In that case we cannot have a
periodic job finding out unique cluster IDs' and adding them to the new table we envisage.
Correct ?

I am fine with having a /clusterids per say as I mentioned on the other JIRA, but for cloud
use case, wouldn't this list become quite large ?

> Support for new REST end point /clusterids
> ------------------------------------------
>                 Key: YARN-6105
>                 URL: https://issues.apache.org/jira/browse/YARN-6105
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Rohith Sharma K S
> As discussed in YARN-5378 and YARN-6095, it is required to have */clusterids* that returns
list of clusterids that back end has is useful. 
> Use case : In cloud, clusters are arbitrarily spin up and destroyed. Each cluster has
its own clusterId which UI never knows about it. To all those newly spin up cluster, same
ATS server has been used. And sam web UI has been used. Admin can select the clusterId and
navigate to any pages. So, it is worth to list ClusterId's from ATS

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