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https://issues.apache.org/jira/browse/YARN-5585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15778411#comment-15778411
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Varun Saxena commented on YARN-5585:
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Thanks [~rohithsharma] for the latest patch.
I am fine with discussing and fixing the 2 points you mentioned above, in
YARN-6027.
We can probably not throw any exception in this patch, either in getEntity and
getEntities call.
Personally, I am fine with either throwing an exception or not throwing it. I
do understand that exception maybe specifically due to storage here. I do not
think though idprefix should be part of entity identifier. Anyways lets defer
that discussion to later in the interest of closing this JIRA.
I will have a look at the patch you have posted, by tomorrow and if it seems
fine, commit it 2-3 days later, just in case Li would want to have a look too.
> [Atsv2] Reader side changes for entity prefix and support for pagination via
> additional filters
> -----------------------------------------------------------------------------------------------
>
> 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
> Priority: Critical
> Labels: yarn-5355-merge-blocker
> Attachments: 0001-YARN-5585.patch, YARN-5585-YARN-5355.0001.patch,
> YARN-5585-YARN-5355.0002.patch, YARN-5585-YARN-5355.0003.patch,
> YARN-5585-YARN-5355.0004.patch, YARN-5585-YARN-5355.0005.patch,
> YARN-5585-workaround.patch, 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.
> Current Behavior : Default limit is set to 100. If there are 1000 entities
> then REST call gives first/last 100 entities. How to retrieve next set of 100
> entities i.e 101 to 200 OR 900 to 801?
> Example : If applications are stored database, app-1 app-2 ... app-10.
> *getApps?limit=5* gives app-1 to app-5. But to retrieve next 5 apps, there is
> no way to achieve this.
> 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.
> Since ATS is targeting large number of entities storage, it is very common
> use case to get next set of entities using fromId rather than querying all
> the entites. This is very useful for pagination in web UI.
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