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From "Akira Ajisaka (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10778) Optimize the output result of FileDistribution processor in hdfs oiv command
Date Tue, 06 Sep 2016 01:51:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15466139#comment-15466139
] 

Akira Ajisaka commented on HDFS-10778:
--------------------------------------

Thanks [~linyiqun] for updating the patch. I tried your patch and get the following output:
{noformat}
[centos@ip-172-31-21-203 conf]$ hdfs oiv -p FileDistribution -format -step 30 -maxSize 300
-i /hadoop/dfs/name/current/fsimage_0000000000000000307
Processed 0 inodes.
Size Range	NumFiles
(0 B, 30 B]	2
(270 B, 300 B]	32
totalFiles = 34
totalDirectories = 13
totalBlocks = 34
totalSpace = 288198
maxFileSize = 160321
{noformat}
Actually maxFileSize is 160321 but the output says the file is in {{(270 B, 300 B\]}}. Would
you fix it to output (270B, maxFileSize]?

If a fsimage includes empty files, the output is as follows:
{noformat}
Size Range	NumFiles
(0 B, 0 B]	1
(0 B, 30 B]	2
{noformat}
I'm thinking \[0 B, 0 B\] is better than (0 B, 0 B\].

> 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
>         Attachments: HDFS-10778.001.patch, HDFS-10778.002.patch, HDFS-10778.003.patch,
HDFS-10778.004.patch, HDFS-10778.005.patch
>
>
> 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 B, 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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