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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3920) FairScheduler Reserving a node for a container should be configurable to allow it used only for large containers
Date Thu, 27 Aug 2015 06:30:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-3920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14716162#comment-14716162
] 

Hadoop QA commented on YARN-3920:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  16m 43s | Pre-patch trunk compilation is healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any @author tags.
|
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to include 2 new
or modified test files. |
| {color:red}-1{color} | javac |   3m 37s | The patch appears to cause the build to fail.
|
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12752667/YARN-3920.004.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 4cbbfa2 |
| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/8924/console |


This message was automatically generated.

> FairScheduler Reserving a node for a container should be configurable to allow it used
only for large containers
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3920
>                 URL: https://issues.apache.org/jira/browse/YARN-3920
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler
>            Reporter: Anubhav Dhoot
>            Assignee: Anubhav Dhoot
>         Attachments: YARN-3920.004.patch, YARN-3920.004.patch, YARN-3920.004.patch, yARN-3920.001.patch,
yARN-3920.002.patch, yARN-3920.003.patch
>
>
> Reserving a node for a container was designed for preventing large containers from starvation
from small requests that keep getting into a node. Today we let this be used even for a small
container request. This has a huge impact on scheduling since we block other scheduling requests
until that reservation is fulfilled. We should make this configurable so its impact can be
minimized by limiting it for large container requests as originally intended. 



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