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From "Suresh Antony (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8065) discp should have an option to compress data while copying.
Date Mon, 13 Feb 2012 18:43:04 GMT
discp 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
            Priority: Minor
             Fix For: 0.20.2


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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