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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10567) Improve plan command help message
Date Tue, 16 Aug 2016 03:20:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10567?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15422109#comment-15422109

Hudson commented on HDFS-10567:

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #10278 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/10278/])
HDFS-10567. Improve plan command help message. Contributed by Xiaobing (aengineer: rev 02abd131b857a89d9fc21507296603120bb50810)
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DiskBalancer.java

> Improve plan command help message
> ---------------------------------
>                 Key: HDFS-10567
>                 URL: https://issues.apache.org/jira/browse/HDFS-10567
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>            Reporter: Lei (Eddy) Xu
>            Assignee: Xiaobing Zhou
>         Attachments: HDFS-10567-HDFS-10576.001.patch, HDFS-10567-HDFS-10576.002.patch,
HDFS-10567-HDFS-10576.003.patch, HDFS-10567-HDFS-1312.000.patch
> {code}
>     --bandwidth <arg>             Maximum disk bandwidth to be consumed by
>                                   diskBalancer. e.g. 10
>     --maxerror <arg>              Describes how many errors can be
>                                   tolerated while copying between a pair
>                                   of disks.
>     --out <arg>                   File to write output to, if not
>                                   specified defaults will be used.
>     --plan <arg>                  creates a plan for datanode.
>     --thresholdPercentage <arg>   Percentage skew that wetolerate before
>                                   diskbalancer starts working e.g. 10
>     --v                           Print out the summary of the plan on
>                                   console
> {code}
> We should 
> * Put the unit into {{--bandwidth}}, or its help message. Is it an integer or float /
double number? Not clear in CLI message.
> * Give more details about {{--plan}}. It is not clear what the {{<arg>}} is for.
> * {{--thresholdPercentage}},  has typo {{wetolerate}} in the error message. Also it needs
to indicated that it is the difference between space utilization between two disks / volumes.
 Is it an integer or float / double number?
> Thanks.

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