[jira] Commented: (MAPREDUCE-228) want InputFormat and OutputFormat for zip archives

["Lianhui Wang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12984227#action_12984227 ] 

Lianhui Wang commented on MAPREDUCE-228:
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i agree with arkady borkovsky. let the FileInputFormat.getSplits(JobConf, int) to choose the compressed InputFormat accord to the filename. 
for example:LzoTextInputFormat or ZipTextInputFormat.
but now the FileInputFormat cannot support it.

> want InputFormat and OutputFormat for zip archives
> --------------------------------------------------
>
>                 Key: MAPREDUCE-228
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-228
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>            Reporter: Doug Cutting
>
> An InputFormat and OutputFormat for zip-format archives would be useful.  It would provide a standard file format, friendly to foreign applications (e.g., streaming), that is also optimized for Hadoop.
> The OutputFormat could generate archives containing a series of small (~1MB) files, each individually compressed.  The InputFormat could then generate a split for each file in the archive.  (Zip archives contain a directory at the end of the file that may be efficiently read when constructing splits.)  Input splits could thus be sent to a node where they are stored locally for the map phase, providing good performance.
> This would thus permit applications to (1) use a standard file format; (2) keep data compressed; and (3) efficiently split input into chunks substantially smaller than HDFS blocks.  This is not available today.

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