[jira] [Commented] (YARN-5585) [Atsv2] Add a new filter fromId in REST endpoints

["Li Lu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-5585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15450450#comment-15450450 ] 

Li Lu commented on YARN-5585:
-----------------------------

OK let me make sure if I fully understand it here: the ultimate use case is pagination. To support this, we need our APIs to not only have number limits, but also the start position of the returned values. One thing to note is that in ATS v2, entities may not stored in their creation time order (although may quite possibly be so). Therefore this is slightly different to the fromId in ATS v1, where it will "retrieve entities earlier than and including the specified ID". I'm fine with the proposal to add this feature but we may want to note users the difference between two versions of timeline APIs. Am I missing something here? 

> [Atsv2] Add a new filter fromId in REST endpoints
> -------------------------------------------------
>
>                 Key: YARN-5585
>                 URL: https://issues.apache.org/jira/browse/YARN-5585
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelinereader
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>
> TimelineReader REST API's provides lot of filters to retrieve the applications. Along with those, it would be good to add new filter i.e fromId so that entities can be retrieved after the fromId. 
> Example : If applications are stored database, app-1 app-2 ... app-10.
> *getApps?limit=5* gives app-1 to app-10. But to retrieve next 5 apps, it is difficult.
> So proposal is to have fromId in the filter like *getApps?limit=5&&fromId=app-5* which gives list of apps from app-6 to app-10. 
> This is very useful for pagination in web UI.



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