[Cassandra Wiki] Update of "StorageConfiguration" by AlexisLeQuoc

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The "StorageConfiguration" page has been changed by AlexisLeQuoc:
http://wiki.apache.org/cassandra/StorageConfiguration?action=diff&rev1=58&rev2=59

  
   * '''replica_placement_strategy''' and '''replication_factor'''
  
+ === Pre-0.8.1 ===
  Strategy: Setting this to the class that implements {{{IReplicaPlacementStrategy}}} will change the way the node picker works. Out of the box, Cassandra provides {{{org.apache.cassandra.locator.RackUnawareStrategy}}} and {{{org.apache.cassandra.locator.RackAwareStrategy}}} (place one replica in a different datacenter, and the others on different racks in the same one.)
  
  Note that the replication factor (RF) is the ''total'' number of nodes onto which the data will be placed.  So, a replication factor of 1 means that only 1 node will have the data.  It does '''not''' mean that one ''other'' node will have the data.
  
  Defaults are: 'org.apache.cassandra.locator.RackUnawareStrategy' and '1'. RF of at least 2 is highly recommended, keeping in mind that your effective number of nodes is (N total nodes / RF).
+ 
+ === 0.8.1 ===
+ Strategy: Setting this to the class that implements {{{IReplicaPlacementStrategy}}} will change the way the node picker works. Out of the box, Cassandra provides {{{org.apache.cassandra.locator.SimpleStrategy}}}, {{{org.apache.cassandra.locator.LocalStrategy}}} and  {{{org.apache.cassandra.locator.NetworkTopologyStrategy}}} (place one replica in a different datacenter, and the others on different racks in the same one.)
+ 
+ Note that the replication factor (RF) is the ''total'' number of nodes onto which the data will be placed.  So, a replication factor of 1 means that only 1 node will have the data.  It does '''not''' mean that one ''other'' node will have the data.
+ 
+ Defaults are: 'org.apache.cassandra.locator.NetworkTopologyStrategy' and '1'. RF of at least 2 is highly recommended, keeping in mind that your effective number of nodes is (N total nodes / RF).
  
  == per-ColumnFamily Settings ==
   * '''comment''' and '''name'''