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https://issues.apache.org/jira/browse/SOLR-16717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17740901#comment-17740901
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ASF subversion and git services commented on SOLR-16717:
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Commit 0c80c7fdc679b2c73dcc5fe8775d1f7b071ac6f7 in solr's branch
refs/heads/branch_9x from Mikhail Khludnev
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=0c80c7fdc67 ]
SOLR-16717: join multiple shards on both sides. cherry-pick (#1691) (#1763)
> Joining collocated shards
> -------------------------
>
> Key: SOLR-16717
> URL: https://issues.apache.org/jira/browse/SOLR-16717
> Project: Solr
> Issue Type: Improvement
> Reporter: Mikhail Khludnev
> Assignee: Mikhail Khludnev
> Priority: Major
> Fix For: 9.3
>
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> h3. Context
> It's about \{!join} query parser and distributed mode.
> h3. As is
> SOLR-4905 allows to join from single shard collection to many shards
> collection.
> h3. Challenge
> * Support multiple shards on from side as well,
> * but strictly stick to collocated indices that promise much performance.
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