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Posted to common-issues@hadoop.apache.org by "Fei Hui (JIRA)" <ji...@apache.org> on 2017/04/25 07:21:04 UTC
[jira] [Commented] (HADOOP-13114) DistCp should have option to
compress data on write
[ https://issues.apache.org/jira/browse/HADOOP-13114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15982488#comment-15982488 ]
Fei Hui commented on HADOOP-13114:
----------------------------------
[~snayakm] could you please upload a patch for branch-2?
> 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-13114.05.patch, HADOOP-13114.06.patch, 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
>
> 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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