Per Steffensen created SOLR-4114:
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             Summary: 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


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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