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From "Ard Schrijvers (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCR-1080) Change lucene indexing to a 1:1 mapping for properties instead of current 1:* mapping
Date Thu, 23 Aug 2007 09:04:30 GMT
Change lucene indexing to a 1:1 mapping for properties instead of current 1:* mapping
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                 Key: JCR-1080
                 URL: https://issues.apache.org/jira/browse/JCR-1080
             Project: Jackrabbit
          Issue Type: Improvement
          Components: indexing
    Affects Versions: 1.3.1
            Reporter: Ard Schrijvers
            Priority: Minor
             Fix For: 1.4


see [1] for the mail thread on this subject

Since lucene 2.1, not every unique lucene Field results in a seperate .nrm files [LUCENE-756:
Maintain all norms in a single .nrm file to reduce the number of open files and file descriptors
for the non-compound index format.]. This makes it possible to instead index all different
properties in jr in one single lucene Field, to index them all seperately. The index format
will be easier to understand, and some performance gains might be seen. Future possible queries
might be easier to implement. 

The implementation should be backwards compatible. We have chosen to start to do this by testing
the index at startup, and if an old format is detected, old style indexing and querying will
be done. 

[1] http://www.mail-archive.com/dev@jackrabbit.apache.org/msg06907.html

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