anchor.diff:  [[ccr-getting-started-leader-index]]
   === Creating a leader index
   
  -Leader indices require special index settings to ensure that the operations that
  -need to be replicated are available when the
  -follower requests them from the leader. These settings are used to enable soft
  -deletes on the leader index and to control how many soft deletes are retained. A
  +Leader indices require a special index setting to ensure that the operations
  +that need to be replicated are available when the follower requests them from
  +the leader. This setting is used to enable soft deletes on the leader index A
   _soft delete_ occurs whenever a document is deleted or updated. Soft deletes can
  -be enabled only on new indices created on or after {es} 6.5.0. 
  +be enabled only on new indices created on or after {es} 6.5.0.
   
   In the following example, we will create a leader index in the remote cluster:
   
  
positive.code: // CONSOLE
  // TEST[continued]
  <1> Enables soft deletes on the leader index.
  <2> Sets that up to 1024 soft deletes will be retained.
  
  [float]
  [[ccr-getting-started-follower-index]]
  
negative.code:       "number_of_shards" : 1,
        "number_of_replicas" : 0,
        "soft_deletes" : {
          "enabled" : true <1>
        }
      }
    },
  