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https://issues.apache.org/jira/browse/YARN-925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13800928#comment-13800928
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Zhijie Shen commented on YARN-925:
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bq. if you look at the filters more closely you will see we have offset and
limit in the filters which will actually gives you iterative functionality ,
however client has to call them with the right offset.
I thought you agree that we should be able to return all applications, right?
Let's assume we have 1 M applications in store, do we really want to create a
map that contains 1 M applications and return? I'm afraid it will explode the
memory. That's why I think we should return Iterator instead, just like what
JDBC does (e.g. ResultSet). It's not about the filter, I mean anyway we may be
in the situation of returning a huge number of applications.
> HistoryStorage Reader Interface for Application History Server
> --------------------------------------------------------------
>
> Key: YARN-925
> URL: https://issues.apache.org/jira/browse/YARN-925
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Mayank Bansal
> Assignee: Mayank Bansal
> Fix For: YARN-321
>
> Attachments: YARN-925-1.patch, YARN-925-2.patch, YARN-925-3.patch,
> YARN-925-4.patch, YARN-925-5.patch, YARN-925-6.patch
>
>
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