Client devs: Because of some race conditions that will be difficult to fix without tearing up a lot of things, I'll be removing the system_rename_column_family and system_rename_keyspace methods from the client API sometime today. They'll make their first disappearance in what will likely be 0.7-rc1.
The plan is to have this problem resolved by the time 0.7.1 rolls around. The tickets, if you care to track them, are https://issues.apache.org/jira/browse/CASSANDRA-1585 and https://issues.apache.org/jira/browse/CASSANDRA-1630. Cheers, Gary
