[Cassandra Wiki] Update of "API" by BlairZajac

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The "API" page has been changed by BlairZajac:
http://wiki.apache.org/cassandra/API?action=diff&rev1=29&rev2=30

Comment:
For read consistency level THREE, correct s/2/3/

  ||`ANY` ||Not supported. You probably want ONE instead. ||
  ||`ONE` ||Will return the record returned by the first replica to respond. A consistency check is always done in a background thread to fix any consistency issues when `ConsistencyLevel.ONE` is used. This means subsequent calls will have correct data even if the initial read gets an older value.  (This is called ReadRepair) ||
  ||`TWO` ||Will query 2 replicas and return the record with the most recent timestamp.  Again, the remaining replicas will be checked in the background. ||
- ||`THREE` ||Will query 2 replicas and return the record with the most recent timestamp. ||
+ ||`THREE` ||Will query 3 replicas and return the record with the most recent timestamp. ||
  ||`QUORUM` ||Will query all replicas and return the record with the most recent timestamp once it has at least a majority of replicas (`N / 2 + 1`) reported.  Again, the remaining replicas will be checked in the background. ||
  ||`LOCAL_QUORUM` ||Returns the record with the most recent timestamp once a majority of replicas within the local datacenter have replied. ||
  ||`EACH_QUORUM` ||Returns the record with the most recent timestamp once a majority of replicas within each datacenter have replied. ||