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Date: Thu, 15 Dec 2016 15:54:58 +0000 (UTC)
From: "Erick Erickson (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Message-ID: <JIRA.13027025.1481299147000.530393.1481817298568@Atlassian.JIRA>
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References: <JIRA.13027025.1481299147000@Atlassian.JIRA> <JIRA.13027025.1481299147293@arcas>
Subject: [jira] [Commented] (LUCENE-7588) A parallel DrillSideways
 implementation
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archived-at: Thu, 15 Dec 2016 15:55:00 -0000


    [ https://issues.apache.org/jira/browse/LUCENE-7588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15751716#comment-15751716 ] 

Erick Erickson commented on LUCENE-7588:
----------------------------------------

Well, for DrillSideways I'd ping [~mikemccand] for the quickest read if he has the time.

Basically you gently prompt the JIRA from time to time and see if you can get someone's attention.

Perhaps a short description of the approach the patch takes would help orient someone who's looking at it.


> A parallel DrillSideways implementation
> ---------------------------------------
>
>                 Key: LUCENE-7588
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7588
>             Project: Lucene - Core
>          Issue Type: Improvement
>    Affects Versions: master (7.0), 6.3.1
>            Reporter: Emmanuel Keller
>            Priority: Minor
>              Labels: facet, faceting
>             Fix For: master (7.0), 6.3.1
>
>         Attachments: LUCENE-7588.patch
>
>
> Currently DrillSideways implementation is based on the single threaded IndexSearcher.search(Query query, Collector results).
> On large document set, the single threaded collection can be really slow.
> The ParallelDrillSideways implementation could:
> 1. Use the CollectionManager based method IndexSearcher.search(Query query, CollectorManager collectorManager)  to get the benefits of multithreading on index segments,
> 2. Compute each DrillSideway subquery on a single thread.


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