anchor.diff:  }
   ----
   
  -== Search Rate Trigger
  +=== Search Rate Trigger
   
   The search rate trigger can be used for monitoring search rates in a selected
   collection (1-min average rate by default), and request that either replicas be moved from
  
positive.code: }
  ----
  
  == Index Size Trigger
  This trigger can be used for monitoring the size of collection shards, measured either by the
  number of documents in a shard or the physical size of the shard's index in bytes.
  
  
negative.code: }
  ----
  
  === Node Lost Trigger
  
  The `NodeLostTrigger` generates `nodeLost` events when a node leaves the cluster. It can be used to either move replicas
  that were hosted by the lost node to other nodes or to delete them from the cluster.
  
  In addition to the parameters described at <<Trigger Configuration>>, this trigger supports the one more parameter:
  
  `preferredOperation`:: (string, optional, defaults to `MOVEREPLICA`) The operation to be performed in response to an event generated by this trigger. By default, replicas will be moved from the lost nodes to the other nodes in the cluster. The only other supported value is `DELETENODE` which deletes all information about replicas that were hosted by the lost node.
  
  