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From "Yiqun Lin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10778) Optimize the output result of FileDistribution processor in hdfs oiv command
Date Fri, 19 Aug 2016 03:40:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15427560#comment-15427560
] 

Yiqun Lin commented on HDFS-10778:
----------------------------------

Some test output result in my test cluster:
{code}
Size Range   NumFiles
(0 B, 0 B]  16663
(0, 1 M]        778416
(1 M, 2 M]      35125
(2 M, 3 M]      13278
(3 M, 4 M]      10458
...
(126 M, 127 M]  1589
(127 M, 128 M]  24971
totalFiles = 960947
totalDirectories = 30795
totalBlocks = 996233
totalSpace = 35208724040079
maxFileSize = 2593079816
{code}

Attach a initial patch.

> Optimize the output result of FileDistribution processor in hdfs oiv command
> ----------------------------------------------------------------------------
>
>                 Key: HDFS-10778
>                 URL: https://issues.apache.org/jira/browse/HDFS-10778
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: tools
>    Affects Versions: 2.7.1
>            Reporter: Yiqun Lin
>            Assignee: Yiqun Lin
>            Priority: Minor
>
> Now It's not directly to understand the output result of the {{FileDistribution}} processor
that in hdfs oiv command for users. For example, this is a original output:
> {code}
> Size    NumFiles
> 0       22556
> 1048576 404971
> 2097152 29259
> 3145728 16937
> 4194304 9197
> 5242880 6889
> 6291456 4930
> 7340032 4070
> 8388608 299384
> 9437184 274623
> {code}
> Two aspects make that  hard to understand for users.
> First, the size column just showed as the number in byte, it's not readable here. The
better way is showed with a binary prefix.
> Second, the size column would be better to showed as a size range. It will let users
know the value in {{NumFiles}} column was counted from A size to B size.
> The expected output result should be this:
> {code}
> Size Range   NumFiles
> (0 B, 0 B]  1666332
> (0, 1 M]        778473
> (1 M, 2 M]      35125
> (2 M, 3 M]      13978
> (3 M, 4 M]      10158
> (4 M, 5 M]      6970
> {code} 



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