Vrushali C commented on YARN-5627:

Do you mean pagination? 

Pagination could mean return max N entities at a time or max N bytes of 
entities at a time.  Also, I cant recollect if we already do, but we should 
support filters in entities. For example, not all fields in entities may be 
relevant to a user. We should allow retrieving only some fields. 

> [Atsv2] Support streaming reader API to fetch entities
> ------------------------------------------------------
>                 Key: YARN-5627
>                 URL: https://issues.apache.org/jira/browse/YARN-5627
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelinereader
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>            Priority: Major
> There is no limit for size of TimelineEntitie object. It can be varied from 
> KB's to MB. While reading entities list, it would be an potential issue that 
> TimeLineReder would go into OOM situation based on the entity size and limit. 
> Proposal is to support an streaming API to read entities list. 

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