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Date: Mon, 27 Apr 2015 18:55:40 +0000 (UTC)
From: "Wangda Tan (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
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Subject: [jira] [Commented] (YARN-2408) Resource Request REST API for YARN
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    [ https://issues.apache.org/jira/browse/YARN-2408?page=3Dcom.atlassian.=
jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D14514=
701#comment-14514701 ]=20

Wangda Tan commented on YARN-2408:
----------------------------------

[~rdelvalle],
Just went through this JIRA as well as discussion. I found you removed patc=
hes attached in the JIRA, is there any specific reason to do so? I think th=
is may be an useful API, recently we have some patch in web UI to show requ=
ests and relationship between requests/allocations. So I think REST API cha=
nges should be added as well, getting app's ResourceRequests can be the fir=
st step.

> Resource Request REST API for YARN
> ----------------------------------
>
>                 Key: YARN-2408
>                 URL: https://issues.apache.org/jira/browse/YARN-2408
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: webapp
>            Reporter: Renan DelValle
>              Labels: features
>
> I=E2=80=99m proposing a new REST API for YARN which exposes a snapshot of=
 the Resource Requests that exist inside of the Scheduler. My motivation be=
hind this new feature is to allow external software to monitor the amount o=
f resources being requested to gain more insightful information into cluste=
r usage than is already provided. The API can also be used by external soft=
ware to detect a starved application and alert the appropriate users and/or=
 sys admin so that the problem may be remedied.
> Here is the proposed API (a JSON counterpart is also available):
> {code:xml}
> <resourceRequests>
>   <MB>7680</MB>
>   <VCores>7</VCores>
>   <appMaster>
>     <applicationId>application_1412191664217_0001</applicationId>
>     <applicationAttemptId>appattempt_1412191664217_0001_000001</applicati=
onAttemptId>
>     <queueName>default</queueName>
>     <totalMB>6144</totalMB>
>     <totalVCores>6</totalVCores>
>     <numResourceRequests>3</numResourceRequests>
>     <requests>
>       <request>
>         <MB>1024</MB>
>         <VCores>1</VCores>
>         <numContainers>6</numContainers>
>         <relaxLocality>true</relaxLocality>
>         <priority>20</priority>
>         <resourceNames>
>           <resourceName>localMachine</resourceName>
>           <resourceName>/default-rack</resourceName>
>           <resourceName>*</resourceName>
>         </resourceNames>
>       </request>
>     </requests>
>   </appMaster>
>   <appMaster>
>   ...
>   </appMaster>
> </resourceRequests>
> {code}



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