}
public static void createColumnFamily(AstyanaxContext<Cluster> ctx,String ks, String cf, String comparator,
String keyValidator, String defValidator, boolean dropFirst) throws ConnectionException{
Cluster cluster = ctx.getEntity();
KeyspaceDefinition keyspace = cluster.describeKeyspace(ks);
if(keyspace != null){
LOG.warn("Keyspace {} already exists.", ks);
} else{
LOG.warn("Creating keyspace '{}'", ks);
KeyspaceDefinition ksDef = cluster.makeKeyspaceDefinition();