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https://issues.apache.org/jira/browse/SOLR-10426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16033543#comment-16033543
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ASF subversion and git services commented on SOLR-10426:
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Commit 401539758b34279d98c9d25d844ed9435925e938 in lucene-solr's branch
refs/heads/master from [~joel.bernstein]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=4015397 ]
SOLR-10426: Add documentation
> Add shuffle Streaming Expression
> --------------------------------
>
> Key: SOLR-10426
> URL: https://issues.apache.org/jira/browse/SOLR-10426
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
> Assignee: Joel Bernstein
> Fix For: 6.6, master (7.0)
>
> Attachments: SOLR-10426.patch
>
>
> Currently the concept of MapReduce shuffling is lumped into the *search*
> Streaming Expression. This causes quite a bit of confusion as users sometimes
> perform a search using the /select handler by default, but actually wanted
> shuffling behavior which requires the /export handler.
> We can solve this problem by creating a separate function called *shuffle*
> that always uses the /export handler.
> This will also allow us to clean up some behaviors in the search expression
> that are somewhat unexpected in future tickets.
> {code}
> parallel(workers,
> unique(shuffle(collection1,
> q=*:*,
> fl="id,a_s,a_i,a_f",
> sort="a_f asc, a_i asc",
> partitionKeys="a_f"),
> over="a_f"),
> workers="2",
> sort="a_f asc")
> {code}
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