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https://issues.apache.org/jira/browse/YARN-5585?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rohith Sharma K S updated YARN-5585:
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Attachment: 0001-YARN-5585.patch
Updating the patch with following changes for early review
# Added *idPrefix* in TimelineEntity object.
Collector Implementation:
# id_prefix is been published as row-key and as column to HBase.
Reader Implementation:
# entityPrefixId is part of TimelineReaderContext.
# Along with entityPrefixId, fromId is also supported. Difference is
entityPrefixId applied at storage level, and fromId is applied at reader side.
# Removed sortedKey variable.
# Used LinkedHashSet instead of TreeSet while adding entities to Set.
# startRow and stopRow is calculated dynamically based on entityPrefixId
existence.
Pending Task.
# Need to add queryParams in REST end points from entityPrefixId and fromId
# For single entity retrieval, need to use SingleColumnFileter for retrieval.
# Need to test in real cluster
> [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
> Priority: Critical
> Attachments: 0001-YARN-5585.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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