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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4764) Faster but more RAM/Disk consuming DocValuesFormat for facets
Date Tue, 12 Feb 2013 14:45:12 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13576650#comment-13576650
] 

Robert Muir commented on LUCENE-4764:
-------------------------------------

I don't think that Facet42Codec should be final

this way it can still be tweaked in the normal ways someone would tweak the default codec,
overriding
getPostings/DocValuesFormatForField, e.g.:
{code}
@Override
PostingsFormat getPostingsFormatForField(String field) {
  if (field.equals("id")) {
    return memory;
  } else {
    super.getPostingsFormatForField(field);
  }
}
{code}
                
> Faster but more RAM/Disk consuming DocValuesFormat for facets
> -------------------------------------------------------------
>
>                 Key: LUCENE-4764
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4764
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 4.2, 5.0
>
>         Attachments: LUCENE-4764.patch, LUCENE-4764.patch, LUCENE-4764.patch
>
>
> The new default DV format for binary fields has much more
> RAM-efficient encoding of the address for each document ... but it's
> also a bit slower at decode time, which affects facets because we
> decode for every collected docID.

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