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From "Yongjun Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8065) distcp should have an option to compress data while copying.
Date Fri, 18 Nov 2016 18:57:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15677449#comment-15677449
] 

Yongjun Zhang commented on HADOOP-8065:
---------------------------------------

Thanks a lot [~raviprak], I will take a look at HADOOP-13114 asap.

> distcp should have an option to compress data while copying.
> ------------------------------------------------------------
>
>                 Key: HADOOP-8065
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8065
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 0.20.2
>            Reporter: Suresh Antony
>            Assignee: Suraj Nayak
>            Priority: Minor
>              Labels: distcp
>             Fix For: 0.20.2
>
>         Attachments: HADOOP-8065-trunk_2015-11-03.patch, HADOOP-8065-trunk_2015-11-04.patch,
HADOOP-8065-trunk_2016-04-29-4.patch, HADOOP-8065.005.patch, HADOOP-8065.006.patch, patch.distcp.2012-02-10
>
>
> We would like compress the data while transferring from our source system to target system.
One way to do this is to write a map/reduce job to compress that after/before being transferred.
This looks inefficient. 
> Since distcp already reading writing data it would be better if it can accomplish while
doing this. 
> Flip side of this is that distcp -update option can not check file size before copying
data. It can only check for the existence of file. 
> So I propose if -compress option is given then file size is not checked.
> Also when we copy file appropriate extension needs to be added to file depending on compression
type.



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