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Date: Wed, 14 Dec 2011 09:04:30 +0000 (UTC)
From: "Uwe Schindler (Updated) (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
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Subject: [jira] [Updated] (LUCENE-3531) Improve CachingWrapperFilter to
 optionally also cache acceptDocs, if identical to liveDocs
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     [ https://issues.apache.org/jira/browse/LUCENE-3531?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Uwe Schindler updated LUCENE-3531:
----------------------------------

    Attachment: LUCENE-3531-identityFix.patch

Here an improved patch factoring out the wrapper object to o.a.l.util, adding tests.

Once this is committed, I will review other code and maybe move to this wrapper class (e.g. MMapIndexInput's cloned inputs)
                
> Improve CachingWrapperFilter to optionally also cache acceptDocs, if identical to liveDocs
> ------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-3531
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3531
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: core/search
>    Affects Versions: 4.0
>            Reporter: Uwe Schindler
>            Assignee: Michael McCandless
>             Fix For: 4.0
>
>         Attachments: LUCENE-3531-identityFix.patch, LUCENE-3531-identityFix.patch, LUCENE-3531.patch
>
>
> Spinoff from LUCENE-1536: This issue removed the different cache modes completely and always applies the acceptDocs using BitsFilteredDocIdSet.wrap(), the cache only contains raw DocIdSet without any deletions/acceptDocs. For IndexReaders that are seldom reopened, this might not be as performant as it could be. If the acceptDocs==IR.liveDocs, those DocIdSet could also be cached with liveDocs applied.

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