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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4287) Capacity Scheduler: Rack Locality improvement
Date Fri, 23 Oct 2015 00:15:27 GMT

    [ https://issues.apache.org/jira/browse/YARN-4287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14970159#comment-14970159
] 

Hadoop QA commented on YARN-4287:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  17m  9s | 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 4 new
or modified test files. |
| {color:green}+1{color} | javac |   7m 59s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  10m 26s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 24s | The applied patch does not increase
the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   0m 50s | The applied patch generated  4 new checkstyle
issues (total was 257, now 259). |
| {color:red}-1{color} | whitespace |   0m 12s | The patch has 1  line(s) that end in whitespace.
Use git apply --whitespace=fix. |
| {color:green}+1{color} | install |   1m 31s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 34s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   1m 31s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | yarn tests |  58m 19s | Tests passed in hadoop-yarn-server-resourcemanager.
|
| | |  99m  3s | |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12768138/YARN-4287-v2.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 124a412 |
| checkstyle |  https://builds.apache.org/job/PreCommit-YARN-Build/9533/artifact/patchprocess/diffcheckstylehadoop-yarn-server-resourcemanager.txt
|
| whitespace | https://builds.apache.org/job/PreCommit-YARN-Build/9533/artifact/patchprocess/whitespace.txt
|
| hadoop-yarn-server-resourcemanager test log | https://builds.apache.org/job/PreCommit-YARN-Build/9533/artifact/patchprocess/testrun_hadoop-yarn-server-resourcemanager.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-YARN-Build/9533/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf902.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep
3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/9533/console |


This message was automatically generated.

> Capacity Scheduler: Rack Locality improvement
> ---------------------------------------------
>
>                 Key: YARN-4287
>                 URL: https://issues.apache.org/jira/browse/YARN-4287
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler
>    Affects Versions: 2.7.1
>            Reporter: Nathan Roberts
>            Assignee: Nathan Roberts
>         Attachments: YARN-4287-v2.patch, YARN-4287.patch
>
>
> YARN-4189 does an excellent job describing the issues with the current delay scheduling
algorithms within the capacity scheduler. The design proposal also seems like a good direction.
> This jira proposes a simple interim solution to the key issue we've been experiencing
on a regular basis:
>  - rackLocal assignments trickle out due to nodeLocalityDelay. This can have significant
impact on things like CombineFileInputFormat which targets very specific nodes in its split
calculations.
> I'm not sure when YARN-4189 will become reality so I thought a simple interim patch might
make sense. The basic idea is simple: 
> 1) Separate delays for rackLocal, and OffSwitch (today there is only 1)
> 2) When we're getting rackLocal assignments, subsequent rackLocal assignments should
not be delayed
> Patch will be uploaded shortly. No big deal if the consensus is to go straight to YARN-4189.




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