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From Apache Wiki <>
Subject [Solr Wiki] Update of "SolrCloud" by Mark Miller
Date Sat, 17 Nov 2012 02:38:50 GMT
Dear Wiki user,

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The "SolrCloud" page has been changed by Mark Miller:

  The Grouping feature only works if groups are in the same shard. Proper support will require
custom hashing and there is already a JIRA issue working towards this.
+ == Glossary ==
+ Collection: A single search index.
+ Shard: Either a logical or physical section of a single index depending on context. A logical
section is also called a slice. A physical shard is expressed as a SolrCore.
+ Slice: A logical section of a single index. One or more identical, physical shards make
up a slice.
+ SolrCore: Encapsulates a single physical index. One or more make up logical shards (or slices)
which make up a collection.
+ Node: A single instance of Solr. A single Solr instance can have multiple SolrCores that
can be part of any number of collections.
+ Cluster: All of the nodes you are using to host SolrCores.
  == FAQ ==
   * '''Q:''' I'm seeing lot's of session timeout exceptions - what to do?

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