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From "Dawid Weiss (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3753) Restructure the Lucene build system
Date Mon, 06 Feb 2012 20:54:59 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13201575#comment-13201575
] 

Dawid Weiss commented on LUCENE-3753:
-------------------------------------

Yes, this is what Mike's python magic does -- puts a fraction of all tests on each slave,
then assigns on-demand. I reimplemented this in Java and it works quite nice as it can even
consume precomputed statistics to make better estimates. The problem is as always in details
(which I won't trouble you with at the moment). Robert is also right that re-running with
different parameters/ JVM settings/ classpath will require multiple runs... for a moment I
had a hope to neglect this :)

The speedups aren't dramatic, especially after Robert worked on the longest tests, so this
is not a huge priority. Interestingly, Maven's latest release of surefire also includes an
option to do balanced parallel tests (on separate vms). Didn't experiment with it yet.
                
> Restructure the Lucene build system
> -----------------------------------
>
>                 Key: LUCENE-3753
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3753
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: general/build
>    Affects Versions: 3.6, 4.0
>            Reporter: Steven Rowe
>            Assignee: Steven Rowe
>         Attachments: LUCENE-3753.patch, LUCENE-3753.patch, LUCENE-3753.patch
>
>
> Split out separate core/, test-framework/, and tools/ modules, each with its own build.xml,
under the lucene/ directory, similar to the Solr restructuring done in SOLR-2452.

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