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From "Li Lu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5739) Provide timeline reader API to list available timeline entity types for one application
Date Thu, 01 Dec 2016 00:59:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-5739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15710412#comment-15710412
] 

Li Lu commented on YARN-5739:
-----------------------------

Also, the two augmentParams in GenericEntityReader and in ApplicationEntityReader seems quite
similar. The only difference is we need to distinguish if a read is single entity read when
we actually augment the params. Can we merge the two logic together? I can expose the base
implementation on augmentParams but was wondering if we can further simplify the logic here
to just let ApplicationEntityReader#augmentParams call super? 

> Provide timeline reader API to list available timeline entity types for one application
> ---------------------------------------------------------------------------------------
>
>                 Key: YARN-5739
>                 URL: https://issues.apache.org/jira/browse/YARN-5739
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelinereader
>            Reporter: Li Lu
>            Assignee: Li Lu
>         Attachments: YARN-5739-YARN-5355.001.patch, YARN-5739-YARN-5355.002.patch, YARN-5739-YARN-5355.003.patch,
YARN-5739-YARN-5355.004.patch, YARN-5739-YARN-5355.005.patch
>
>
> Right now we only show a part of available timeline entity data in the new YARN UI. However,
some data (especially library specific data) are not possible to be queried out by the web
UI. It will be appealing for the UI to provide an "entity browser" for each YARN application.
Actually, simply dumping out available timeline entities (with proper pagination, of course)
would be pretty helpful for UI users. 
> On timeline side, we're not far away from this goal. Right now I believe the only thing
missing is to list all available entity types within one application. The challenge here is
that we're not storing this data for each application, but given this kind of call is relatively
rare (compare to writes and updates) we can perform some scanning during the read time. 



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