I am newbie to cassandra. I am using MAC machine. I am following Cassandra tutorial, able to create keyspace Twissandra, column family 'Users'. I am not able to Insert into user family. The CQLSH command is saying "Unable to complete request: one or more nodes were unavailable.". I have changed the Cassandra data path thru SED command .Able to see the name 'twissandra' keyspace under "casssandra-data" folder. it has 755 permissions too. .please help me.