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https://issues.apache.org/jira/browse/HADOOP-13114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15813083#comment-15813083
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Ravi Prakash edited comment on HADOOP-13114 at 1/9/17 11:20 PM:
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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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