[jira] Updated: (JCR-1080) Change lucene indexing to a 1:1 mapping for properties instead of current 1:* mapping

["Jukka Zitting (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JCR-1080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jukka Zitting updated JCR-1080:
-------------------------------

        Fix Version/s:     (was: 1.4)
    Affects Version/s:     (was: 1.3.1)

> Change lucene indexing to a 1:1 mapping for properties instead of current 1:* mapping
> -------------------------------------------------------------------------------------
>
>                 Key: JCR-1080
>                 URL: https://issues.apache.org/jira/browse/JCR-1080
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: indexing
>            Reporter: Ard Schrijvers
>            Priority: Minor
>
> 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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