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Posted to dev@lucene.apache.org by "Shai Erera (JIRA)" <ji...@apache.org> on 2013/11/02 05:28:17 UTC

[jira] [Created] (LUCENE-5321) Remove Facet42DocValuesFormat

Shai Erera created LUCENE-5321:
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             Summary: Remove Facet42DocValuesFormat
                 Key: LUCENE-5321
                 URL: https://issues.apache.org/jira/browse/LUCENE-5321
             Project: Lucene - Core
          Issue Type: Improvement
          Components: modules/facet
            Reporter: Shai Erera


The new DirectDocValuesFormat is nearly identical to Facet42DVF, except that it stores the addresses in direct int[] rather than PackedInts. On LUCENE-5296 we measured the performance of DirectDVF vs Facet42DVF and it improves perf for some queries and have negligible effect for others, as well as RAM consumption isn't much worse. We should remove Facet42DVF and use DirectDVF instead.

I also want to rename Facet46Codec to FacetCodec. There's no need to refactor the class whenever the default codec changes (e.g. from 45 to 46) since it doesn't care about the actual Codec version underneath, it only overrides the DVF used for the facet fields. FacetCodec should take the DVF from the app (so e.g. the facet/ module doesn't depend on codecs/) and be exposed more as a utility Codec rather than a real, versioned, Codec.



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