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https://issues.apache.org/jira/browse/LUCENE-5321?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera updated LUCENE-5321:
-------------------------------

    Attachment: LUCENE-5321.patch

I ended up removing everything under o.a.l.facet.codecs/, including 
Facet46Codec. It seemed redundant as all it does is use the app's DVF with the 
facet fields that are returned by 
FacetIndexingParams.getAllCategoryListParams(). It's a waste of time and 
resources to maintain such a Codec.

I also removed some tests which tested Facet42DVF.

> 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
>         Attachments: LUCENE-5321.patch
>
>
> 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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