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https://issues.apache.org/jira/browse/SOLR-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12862852#action_12862852
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David Smiley commented on SOLR-1352:
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Without having to read the patch, can someone describe in more detail the
nature of DIH multi-threading? I can figure what it would mean to have two
threads, one to read from the data provider and one to write to Solr, with a
queue in-between. But it's not clear what's going on here since thread can be
> 2.
> DIH: MultiThreaded
> ------------------
>
> Key: SOLR-1352
> URL: https://issues.apache.org/jira/browse/SOLR-1352
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 1.5
>
> Attachments: SOLR-1352.patch, SOLR-1352.patch, SOLR-1352.patch
>
>
> It has been a long pending request to make DIH multithreaded. Now that we
> have implemented most of the features , the next best thing we can aim for is
> performance. DIH should be able to take advantage of multiple cores in a box
> .I expect the configuration to be as follows
> {code:xml}
> <entity name="foo" threads="4">
> <!--more stuff goes here-->
> </entity>
> {code}
> at the entity where the threads is specified it should fork into multiple
> threads. If the threads<2 it executes w/o forking. In debug mode it
> automatically becomes singlethreaded.
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