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From "Rohith Sharma K S (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (YARN-5585) [Atsv2] Add a new filter fromId in REST endpoints
Date Wed, 07 Sep 2016 12:57:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-5585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15470538#comment-15470538
] 

Rohith Sharma K S edited comment on YARN-5585 at 9/7/16 12:56 PM:
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bq. Can you tell me the use case ? Listing all DAGs' or listing DAGs' within an app ? Or something
else ? Typically how many DAGs' can there be per app ?
Basic use case is to achieve pagination nevertheless apps/flows/entities such as DAG or containers
or any other user entities or system entities. Currently limit is 100 for any entities to
retrieve. Say if number of entities is 200. Then REST call retrieves 100 entities. And how
to retrieve 100 to 200 entities?


was (Author: rohithsharma):
bq. Can you tell me the use case ? Listing all DAGs' or listing DAGs' within an app ? Or something
else ? Typically how many DAGs' can there be per app ?
Basic use case is to achieve pagination nevertheless DAG or containers or any other user entities.
Currently limit is 100 for any entities to retrieve. Say if number of entities is 200. Then
REST call retrieves 100 entities. And how to retrieve 100 to 200 entities?

> [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
>         Attachments: YARN-5585.v0.patch
>
>
> 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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