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From "Ravi Prakash (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HADOOP-13114) DistCp should have option to compress data on write
Date Mon, 09 Jan 2017 23:20:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15813083#comment-15813083
] 

Ravi Prakash edited comment on HADOOP-13114 at 1/9/17 11:20 PM:
----------------------------------------------------------------

Here's a rebase of the patch from Suraj and Yongjun. To try it out, you could use this command:

{code}
hadoop distcp -Ddistcp.output.fileoutputformat.compress.codec=org.apache.hadoop.io.compress.BZip2Codec
--compressoutput /input /output
{code}


was (Author: raviprak):
Here's rebase of the patch from Suraj and Yongjun. To try it out, you could use this command:

{code}
hadoop distcp -Ddistcp.output.fileoutputformat.compress.codec=org.apache.hadoop.io.compress.BZip2Codec
--compressoutput /input /output
{code}

> DistCp should have option to compress data on write
> ---------------------------------------------------
>
>                 Key: HADOOP-13114
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13114
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: tools/distcp
>    Affects Versions: 2.8.0, 2.7.3, 3.0.0-alpha1
>            Reporter: Suraj Nayak
>            Assignee: Suraj Nayak
>            Priority: Minor
>              Labels: distcp
>         Attachments: HADOOP-13114-trunk_2016-05-07-1.patch, HADOOP-13114-trunk_2016-05-08-1.patch,
HADOOP-13114-trunk_2016-05-10-1.patch, HADOOP-13114-trunk_2016-05-12-1.patch, HADOOP-13114.05.patch,
HADOOP-13114.06.patch
>
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> DistCp utility should have capability to store data in user specified compression format.
This avoids one hop of compressing data after transfer. Backup strategies to different cluster
also get benefit of saving one IO operation to and from HDFS, thus saving resources, time
and effort.
> * Create an option -compressOutput defaulting to {{org.apache.hadoop.io.compress.BZip2Codec}}.

> * Users will be able to change codec with {{-D mapreduce.output.fileoutputformat.compress.codec=org.apache.hadoop.io.compress.GzipCodec}}
> * If distcp compression is enabled, suffix the filenames with default codec extension
to indicate the file is compressed. Thus users can be aware of what codec was used to compress
the data.



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