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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4368) Support Multiple versions of the timeline service at the same time
Date Wed, 18 Nov 2015 03:19:11 GMT

    [ https://issues.apache.org/jira/browse/YARN-4368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15010129#comment-15010129
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Naganarasimha G R commented on YARN-4368:
-----------------------------------------

My thoughts :
*Pros :* 
* Continiously busy cluster it would be helpfull to have this feature as propability of bringing
down the old ATS version and starting new will be less
* May be all apps have not migrated to the new ATS version's client API's.

*Cons :*
* RM's SMP need to publish for both ATS ? or only to the latest one ? if both unnecessary
load but if only to latest then all informations are not available for the existing apps.
* AHS should be able to pick the data from both versions based on the previous conclusion
!
* User might get confused which ATS configs to use and how long it will be supported  and
whether all information will be supported from all versions!
* If its for momentary down time, would working on this be good ROI ?


> Support Multiple versions of the timeline service at the same time
> ------------------------------------------------------------------
>
>                 Key: YARN-4368
>                 URL: https://issues.apache.org/jira/browse/YARN-4368
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Naganarasimha G R
>
> During rolling updgrade it will be helpfull to have the older version of the timeline
server to be also running so that the existing apps can submit to the older version of ATS
.



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