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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10562) DiskBalancer: update documentation on how to report issues and debug
Date Fri, 09 Sep 2016 20:36:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15478178#comment-15478178

Arpit Agarwal commented on HDFS-10562:

Hi [~anu], thanks for the doc improvements. One question regarding the {{bandwidth}}. Should
the first sentence be reworded to say something like _This is the maximum aggregate source
disk bandwidth used by the balancer_?

223	*bandwidth* - From disk balancer's point of view this is the bandwidth of the 
224	source disk. After moving a block disk balancer computes how many seconds it 
225	should have taken to move that block with the specified bandwidth. If the 
226	actual move took less time than expected, then disk balancer will sleep for 
227	that duration. Please note that currently all moves are executed 
228	sequentially by a single thread.  

> DiskBalancer: update documentation on how to report issues and debug
> --------------------------------------------------------------------
>                 Key: HDFS-10562
>                 URL: https://issues.apache.org/jira/browse/HDFS-10562
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: balancer & mover
>    Affects Versions: HDFS-1312
>            Reporter: Anu Engineer
>            Assignee: Anu Engineer
>            Priority: Minor
>             Fix For: HDFS-1312
>         Attachments: HDFS-10562-HDFS-1312.001.patch
> Add a section in the diskbalancer documentation on how to report issues and how to debug
diskbalancer usage.

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