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https://issues.apache.org/jira/browse/YARN-3656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14641289#comment-14641289
 ] 

Hadoop QA commented on YARN-3656:
---------------------------------

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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 32s | 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 13 new or modified test files. |
| {color:green}+1{color} | javac |   7m 50s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 59s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 23s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   0m 47s | The applied patch generated  
15 new checkstyle issues (total was 115, now 121). |
| {color:green}+1{color} | whitespace |   0m  9s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 19s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 32s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   1m 25s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:red}-1{color} | yarn tests |  52m 11s | Tests failed in 
hadoop-yarn-server-resourcemanager. |
| | |  91m 12s | |
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|| Reason || Tests ||
| Failed unit tests | 
hadoop.yarn.server.resourcemanager.scheduler.fair.TestAllocationFileLoaderService
 |
|   | 
hadoop.yarn.server.resourcemanager.reservation.TestCapacityReservationSystem |
|   | hadoop.yarn.server.resourcemanager.reservation.TestFairReservationSystem |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12747121/YARN-3656-v1.3.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / ff9c13e |
| checkstyle |  
https://builds.apache.org/job/PreCommit-YARN-Build/8660/artifact/patchprocess/diffcheckstylehadoop-yarn-server-resourcemanager.txt
 |
| hadoop-yarn-server-resourcemanager test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8660/artifact/patchprocess/testrun_hadoop-yarn-server-resourcemanager.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/8660/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.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/8660/console |


This message was automatically generated.

> LowCost: A Cost-Based Placement Agent for YARN Reservations
> -----------------------------------------------------------
>
>                 Key: YARN-3656
>                 URL: https://issues.apache.org/jira/browse/YARN-3656
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler, resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Ishai Menache
>            Assignee: Jonathan Yaniv
>              Labels: capacity-scheduler, resourcemanager
>         Attachments: LowCostRayonExternal.pdf, YARN-3656-v1.1.patch, 
> YARN-3656-v1.2.patch, YARN-3656-v1.3.patch, YARN-3656-v1.patch, 
> lowcostrayonexternal_v2.pdf
>
>
> YARN-1051 enables SLA support by allowing users to reserve cluster capacity 
> ahead of time. YARN-1710 introduced a greedy agent for placing user 
> reservations. The greedy agent makes fast placement decisions but at the cost 
> of ignoring the cluster committed resources, which might result in blocking 
> the cluster resources for certain periods of time, and in turn rejecting some 
> arriving jobs.
> We propose LowCost – a new cost-based planning algorithm. LowCost “spreads” 
> the demand of the job throughout the allowed time-window according to a 
> global, load-based cost function. 



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