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Posted to common-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2007/01/03 19:58:27 UTC
[jira] Updated: (HADOOP-850) Add Writable implementations for
variable-length integer types.
[ https://issues.apache.org/jira/browse/HADOOP-850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Doug Cutting updated HADOOP-850:
--------------------------------
Resolution: Fixed
Status: Resolved (was: Patch Available)
I just committed this. Thanks, Andrzej!
> Add Writable implementations for variable-length integer types.
> ---------------------------------------------------------------
>
> Key: HADOOP-850
> URL: https://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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