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https://issues.apache.org/jira/browse/SOLR-5338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792600#comment-13792600
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Shalin Shekhar Mangar commented on SOLR-5338:
---------------------------------------------
[~ysee...@gmail.com] - Would you mind reviewing the new CompositeIdRouter
methods?
> Split shards by a route key
> ---------------------------
>
> Key: SOLR-5338
> URL: https://issues.apache.org/jira/browse/SOLR-5338
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Reporter: Shalin Shekhar Mangar
> Assignee: Shalin Shekhar Mangar
> Fix For: 4.6, 5.0
>
> Attachments: SOLR-5338.patch
>
>
> Provide a way to split a shard using a route key such that all documents of
> the specified route key end up in a single dedicated sub-shard.
> Example:
> Assume that collection1, shard1 has hash range [0, 20]. Also that route key
> 'A!' has hash range [12,15]. Then invoking:
> {code}
> /admin/collections?action=SPLIT&collection=collection1&split.key=A!
> {code}
> should produce three sub-shards with hash range [0,11], [12,15] and [16,20].
> Specifying the source shard is not required here because the route key is
> enough to figure it out. Route keys spanning more than one shards will not be
> supported.
> Note that the sub-shard with the hash range of the route key may also contain
> documents for other route keys whose hashes collide.
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