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The "SolrCloud" page has been changed by ErickErickson:
http://wiki.apache.org/solr/SolrCloud?action=diff&rev1=72&rev2=73

Comment:
Minor explication of replicationFactor.

  
  Create
  
http://localhost:8983/solr/admin/collections?action=CREATE&name=mycollection&numShards=3&replicationFactor=4
+ 
+ Note: replicationFactor defines the maximum number of replicas created in 
addition to the leader from amongst the nodes currently running (i.e. nodes 
added later will not be used for this collection). Imagine you have a cluster 
with 20 nodes and want to add an additional smaller collection to your 
installation with 2 shards, each shard with a leader and two replicas. You 
would specify a replicationFactor=2. Now six of your nodes will host this new 
collection and the other 14 will not host the new collection. 
  
  Delete
  http://localhost:8983/solr/admin/collections?action=DELETE&name=mycollection

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