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Posted to common-issues@hadoop.apache.org by "Yongjun Zhang (JIRA)" <ji...@apache.org> on 2016/11/15 15:34:58 UTC
[jira] [Updated] (HADOOP-8065) distcp should have an option to
compress data while copying.
[ https://issues.apache.org/jira/browse/HADOOP-8065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yongjun Zhang updated HADOOP-8065:
----------------------------------
Attachment: HADOOP-8065.005.patch
> 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, 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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