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https://issues.apache.org/jira/browse/YARN-3984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14649557#comment-14649557
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Zhijie Shen commented on YARN-3984:
-----------------------------------

Okay, "e! eventid # inverse_event_timestamp ? eventkey" sounds a reasonable 
compromise.

Secondly, how do we deal with an event without any info? How about creating a 
column "e! eventid # inverse_event_timestamp ? dummy_key : empty_value"?

> Rethink event column key issue
> ------------------------------
>
>                 Key: YARN-3984
>                 URL: https://issues.apache.org/jira/browse/YARN-3984
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Zhijie Shen
>            Assignee: Vrushali C
>             Fix For: YARN-2928
>
>
> Currently, the event column key is event_id?info_key?timestamp, which is not 
> so friendly to fetching all the events of an entity and sorting them in a 
> chronologic order. IMHO, timestamp?event_id?info_key may be a better key 
> schema. I open this jira to continue the discussion about it which was 
> commented on YARN-3908.



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