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https://issues.apache.org/jira/browse/SOLR-3585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13409046#comment-13409046
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David Smiley commented on SOLR-3585:
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+1 (disclaimer: I haven't looked at the patch)
I've always thought Solr's indexing concurrency model to be strange. It doesn't
have one, except to say that each connection is on its own thread and thus
happens concurrently with any other connection(s). Based on this model, SolrJ
(and the DIH) has an unfair advantage (compared to non-SolrJ) via
StreamingUpdateSolrServer which can load Solr via multiple connections, when
this really should be a server-side setting since the ability of the server to
handle X number of loading threads is not something the client could/should
know. Solr should have a configurable number of threads that pull Documents
off of a common incoming queue. This patch is a step in that direction
although it's not quite equivalent to my idealized vision.
> processing updates in multiple threads
> --------------------------------------
>
> Key: SOLR-3585
> URL: https://issues.apache.org/jira/browse/SOLR-3585
> Project: Solr
> Issue Type: Improvement
> Components: update
> Affects Versions: 4.0
> Reporter: Mikhail Khludnev
> Priority: Minor
> Attachments: SOLR-3585.patch, multithreadupd.patch, report.tar.gz
>
>
> Hello,
> I'd like to contribute update processor which forks many threads which
> concurrently process the stream of commands. It may be beneficial for users
> who streams many docs through single request.
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