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From Mitja Lenič (JIRA) <j...@apache.org>
Subject [jira] Created: (LUCENE-2583) Transparent chunk transformation (compression) of index directory
Date Mon, 02 Aug 2010 22:58:16 GMT
Transparent chunk transformation (compression) of index directory
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                 Key: LUCENE-2583
                 URL: https://issues.apache.org/jira/browse/LUCENE-2583
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Store
    Affects Versions: 3.0.2, 3.0.1, 3.0, 2.9.3, 2.9.2, 2.9.1, 2.9, 2.4.1
            Reporter: Mitja Lenič
            Priority: Minor


In some cases user is willing to sacrifice speed for space efficiency or better data security.
 I've developed driver for Directory that enables transparent compression (any transformation)
of directory files, by using decorator pattern.  With current experience, compression ratios
are between 1:5 to 1:10, which depends on type of data stored in index. 

Directory files are sliced into fixed chunks, each chunk separately transformed (eg. compressed,
encrypted, ...) and written to supporting (nested) directory for storage. 

I've create project page at [http://code.google.com/p/lucenetransform/] and am also prepared
to join contrib/store.

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