[ http://issues.apache.org/jira/browse/HADOOP-850?page=all ]
Andrzej Bialecki updated HADOOP-850:
-------------------------------------
Status: Patch Available (was: Open)
> Add Writable implementations for variable-length integer types.
> ---------------------------------------------------------------
>
> Key: HADOOP-850
> URL: http://issues.apache.org/jira/browse/HADOOP-850
> Project: Hadoop
> Issue Type: Improvement
> Components: io
> Affects Versions: 0.10.0
> Reporter: Andrzej Bialecki
> Assigned To: Andrzej Bialecki
> Priority: Minor
> Fix For: 0.10.0
>
> Attachments: variable-ints.patch
>
>
> Currently Hadoop supports only three basic integer-like types: ByteWritable,
> IntWritable and LongWritable. They provide a fixed tradeoff between their
> value range and on-disk space consumption. But it is sometimes useful to be
> able to store integer values with broader allowed range, but less space
> consumption when possible.
> This is especially useful when storing very long series of values, combined
> with delta encoding.
> Lucene already implements variable-length encoding for positive int and long.
> I propose to add similar Writable implementations, which use the same
> encoding methods.
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