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https://issues.apache.org/jira/browse/YARN-6375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15986299#comment-15986299
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Varun Saxena commented on YARN-6375:
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Ping [~vrushalic].
Is the current approach fine?
> App level aggregation should not consider metric values reported in the
> previous aggregation cycle
> --------------------------------------------------------------------------------------------------
>
> Key: YARN-6375
> URL: https://issues.apache.org/jira/browse/YARN-6375
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Reporter: Varun Saxena
> Assignee: Varun Saxena
> Attachments: YARN-6375-YARN-5355.01.patch
>
>
> Currently app level aggregation is done every 15 seconds.
> And we consider last reported metric value for each entity belonging to an
> app for aggregation.
> We however merely update the corresponding metric values for the entity on
> put. We never remove the entries.
> But it is possible that multiple entities finish during lifetime of an
> application. We however continue to consider them till the end.
> We should however not consider metric values of entities unless reported
> within the 15 second period.
> Consider containers. For a long running app, several containers would start
> and end at various times during the lifetime of an app.
> To consider metrics for all the containers throughout the lifetime of app,
> hence wont be correct.
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