title: Cassandra replication factor greater than number of nodes
body: <p><br />
  I am using the datastax java driver for Apache Cassandra (v. 2.1.9) and I am wondering what should happen when I set replication_factor greater than number of nodes. I've read somewhere that Cassandra allows for this operation, but should fail when I will try to save some data (of course it depends on the write consistency level, but I mean the case of ALL).<br />
  The problem is that everything works, no exception is being thrown, even if I try to save data. Why?<br />
  Maybe the pieces of information which I've read were old, for older versions of Cassandra?
  One more question, whether it's true, than what would happen when I add another node to the cluster?</p>