Hadoop Map/Reduce
  1. Hadoop Map/Reduce
  2. MAPREDUCE-228

want InputFormat and OutputFormat for zip archives

    Details

    • Type: New Feature New Feature
    • Status: Open
    • Priority: Major Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      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.

        Activity

        Doug Cutting created issue -
        Owen O'Malley made changes -
        Field Original Value New Value
        Project Hadoop Common [ 12310240 ] Hadoop Map/Reduce [ 12310941 ]
        Key HADOOP-1229 MAPREDUCE-228
        Component/s mapred [ 12310690 ]

          People

          • Assignee:
            Unassigned
            Reporter:
            Doug Cutting
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            Dates

            • Created:
              Updated:

              Development