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https://issues.apache.org/jira/browse/SOLR-4114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13505575#comment-13505575
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Per Steffensen commented on SOLR-4114:
--------------------------------------

Well Im off for today. Will probably (if my POs head does not turn green) be 
making the spread-shards-according-to-provided-list feature tomorrow. If you 
commit the entire patch for SOLR-4114 it will be easier for me to provide a new 
patch for this new feature and attach it to a new issue :-)
                
> Collection API: Allow multiple shards from one collection on the same Solr 
> server
> ---------------------------------------------------------------------------------
>
>                 Key: SOLR-4114
>                 URL: https://issues.apache.org/jira/browse/SOLR-4114
>             Project: Solr
>          Issue Type: New Feature
>          Components: multicore, SolrCloud
>    Affects Versions: 4.0
>         Environment: Solr 4.0.0 release
>            Reporter: Per Steffensen
>            Assignee: Per Steffensen
>              Labels: collection-api, multicore, shard, shard-allocation
>         Attachments: SOLR-4114.patch, SOLR-4114.patch
>
>
> We should support running multiple shards from one collection on the same 
> Solr server - the run a collection with 8 shards on a 4 Solr server cluster 
> (each Solr server running 2 shards).
> Performance tests at our side has shown that this is a good idea, and it is 
> also a good idea for easy elasticity later on - it is much easier to move an 
> entire existing shards from one Solr server to another one that just joined 
> the cluter than it is to split an exsiting shard among the Solr that used to 
> run it and the new Solr.
> See dev mailing list discussion "Multiple shards for one collection on the 
> same Solr server"

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