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From "Uwe Schindler (JIRA)" <>
Subject [jira] Commented: (LUCENE-2041) Complete parallelizaton of ParallelMultiSearcher
Date Tue, 10 Nov 2009 16:19:27 GMT


Uwe Schindler commented on LUCENE-2041:

Oh I didn't see your patch. But its not so different, I also did lots of code cleanup.

I also used ReentrantLocks. I added a new DummyLock to utils, that is a replacement for ReentrantLock,
but does simply nothing. By this, the synchronized around the HitQueue in MultiSearcher can
be ommitted.

> Complete parallelizaton of ParallelMultiSearcher
> ------------------------------------------------
>                 Key: LUCENE-2041
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>    Affects Versions: 2.9
>            Reporter: Joey Surls
>            Assignee: Uwe Schindler
>            Priority: Minor
>             Fix For: 3.0
>         Attachments: LUCENE-2041-refactor.patch, LUCENE-2041-refactor.patch, LUCENE-2041.patch,
LUCENE-2041.patch, LUCENE-2041.patch, LUCENE-2041.patch, LUCENE-2041.patch, LUCENE_2041.patch
>   Original Estimate: 1h
>  Remaining Estimate: 1h
> ParallelMultiSearcher is parallel only for the method signatures of 'search'.
> Part of a query process calls the method docFreq(). There was a TODO comment to parallelize
this. Parallelizing this method actually increases the performance of a query on multiple
indexes, especially remotely.

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