http://docs.datastax.com/en/cassandra/2.0/cassandra/dml/dml_config_consistency_c.html says that LOCAL_QUORUM is incompatible with the replication strategy SimpleStrategy.
CASSANDRA-6545 (which shipped in 1.2.14 and 2.0.5), it's been possible to use LOCAL_QUORUM on keyspaces created with SimpleStrategy. This seems to work in my testing with C* 2.0.15.
Could the documentation be updated, please?
I haven't looked to see if the same issue exists in the 2.1 and 2.2 documentation on DataStax's site.