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From "Kay Kay (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2107) Upgrading Lucene 2.2 to Lucene 3.0.0
Date Mon, 11 Jan 2010 20:38:54 GMT
Upgrading Lucene 2.2 to Lucene 3.0.0 
-------------------------------------

                 Key: HBASE-2107
                 URL: https://issues.apache.org/jira/browse/HBASE-2107
             Project: Hadoop HBase
          Issue Type: Improvement
            Reporter: Kay Kay


HBase has an utility to export columns as Lucene indices. (o.a.h.hbase.mapreduce.BuildTableIndex
) . 

This patch increases the version in libraries.properties and addresses some deprecations towards
moving it. 

Rationale for upgradation:
====================

A lot has been happening in the Lucene since 2.2, with improved performance and focus on NRT
(Near Real Time search) happening recently.  Hence - we need to keep up with the same and
make the utility publish indices for the new version. 

Caveats:
=======
Index created by Lucene 3.0 is *not backward-compatible* with Lucene 2.2 code.  In other words
- as part of this upgradation - indices need to be created all over again and the library
interacting with the index ( readers / searchers ) need to be upgraded to the new version
as well. 


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