On Wed, Jul 24, 2013 at 12:26 PM, Lanny Ripple <lanny@spotright.com> wrote:
That one is documented -- http://www.datastax.com/documentation/cassandra/1.2/index.html#cassandra/operations/ops_add_dc_to_cluster_t.html

That doc is incomplete, IMO. It (and the doc for adding a node) should contain an instruction to run repair. Rebuild, like bootstrap, streams from only one replica. Due to CASSANDRA-2434 [1], if you do not repair after rebuild you may be missing data in your new DC when read at QUORUM_LOCAL. I have bcc:ed docs@datastax for their information. :)

=Rob
[1] https://issues.apache.org/jira/browse/CASSANDRA-2434