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https://issues.apache.org/jira/browse/HDFS-12859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16406967#comment-16406967
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genericqa commented on HDFS-12859:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m  5s{color} 
| {color:red} HDFS-12859 does not apply to trunk. Rebase required? Wrong 
Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HDFS-12859 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12899783/0004-HDFS-12859-Admin-command-resetBalancerBandwidth.patch
 |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/23570/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Admin command resetBalancerBandwidth
> ------------------------------------
>
>                 Key: HDFS-12859
>                 URL: https://issues.apache.org/jira/browse/HDFS-12859
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: balancer & mover
>            Reporter: Jianfei Jiang
>            Priority: Major
>         Attachments: 
> 0003-HDFS-12859-Admin-command-resetBalancerBandwidth.patch, 
> 0004-HDFS-12859-Admin-command-resetBalancerBandwidth.patch, HDFS-12859.patch
>
>
> We can already set balancer bandwidth dynamically using command 
> setBalancerBandwidth. The setting value is not persistent and not stored in 
> configuration file. The different datanodes could their different default or 
> former setting in configuration.
> When we suggested to develop a schedule balancer task which runs at midnight 
> everyday. We set a larger bandwidth for it and hope to reset the value after 
> finishing. However, we found it difficult to reset the different setting for 
> different datanodes as the setBalancerBandwidth command can only set the same 
> value to all datanodes. If we want to use unique setting for every datanode, 
> we have to reset the datanodes.
> So it would be useful to have a command to synchronize the setting with the 
> configuration file. 



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