[Solr Wiki] Update of "SolrCloud" by Mark Miller

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The "SolrCloud" page has been changed by Mark Miller:
https://wiki.apache.org/solr/SolrCloud?action=diff&rev1=106&rev2=107

   * '''createNodeSet''': If not provided the create operation will create shard-replica spread across all of your live Solr nodes. You can provide the "createNodeSet" parameter to change the set of nodes to spread the shard-replica across. The format of values for this param is "<node-name1>,<node-name2>,...,<node-nameN>" - e.g. "localhost:8983_solr,localhost:8984_solr,localhost:8985_solr"
   * '''collection.configName''': The name of the config (must be already stored in zookeeper) to use for this new collection. If not provided the create operation will default to the collection name as the config name.
  
- '''CreateAlias''' http://localhost:8983/solr/admin/collections?action=CREATEALIAS&name=alias&collections=collection1,collection2,…
- 
  <!> [[Solr4.2]]
  
  About the params:
@@ -236, +234 @@

  This feature allows for seamless splitting and requires no down-time. The parent shard is not removed and therefore no data is removed. It is up to the user of the command to unload the shard using the new APIs in SOLR-4693 (under construction).
  
  This feature was released with Solr 4.3 however due to bugs found after 4.3 release, it is recommended that you wait for release 4.3.1 before using this feature.
+ 
+ == Collection Aliases ==
+ 
+ Aliasing allows you to create a single 'virtual' collection name that can point to one more real collections. You can update the alias on the fly.
+ 
+ '''CreateAlias''' http://localhost:8983/solr/admin/collections?action=CREATEALIAS&name=alias&collections=collection1,collection2,…
+ 
+ Creates or updates a given alias. Aliases that are used to send updates to should only map an alias to a single collection. Read aliases can map an alias to a single collection or multiple collections.
+ 
+ '''DeleteAlias''' http://localhost:8983/solr/admin/collections?action=DELETEALIAS&name=alias
+ 
+ Removes an existing alias.
  
  == Creating cores via CoreAdmin ==
  New Solr cores may also be created and associated with a collection via CoreAdmin.