http://www.datastax.com/support-forums/topic/two-data-centers-configuration-question Software, Support, and Training for Apache Cassandra en-US Thu, 20 Jun 2013 00:18:04 +0000 http://bbpress.org/?v=1.0.3 q http://www.datastax.com/support-forums/search.php http://www.datastax.com/support-forums/topic/two-data-centers-configuration-question#post-1493 Mon, 02 Apr 2012 14:44:46 +0000 joaquin 1493@http://www.datastax.com/support-forums/ <p>Hello Andrey,</p> <p>You should also set your seed nodes to be the public IPs. I'll notify the docs team to get that added.</p> <p>Let us know if this fixes things for you.</p> <p>Thanks,<br /> Joaquin </p> http://www.datastax.com/support-forums/topic/two-data-centers-configuration-question#post-1439 Tue, 27 Mar 2012 22:58:38 +0000 Anonymous 1439@http://www.datastax.com/support-forums/ <p>Hello everybody!<br /> I'm thinking about installing cassandra in two ec2 regions. There is at least one thing I don't understand. Documentation says</p> <p>If using this snitch, you must configure each Cassandra node so that listen_address is set to the private IP address or the node, and broadcast_address is set to the public IP address of the node. This allows Cassandra nodes in one EC2 region to bind to nodes in another region, thus enabling multi-data center support.</p> <p>Even each node knows about nodes from another DC, they are still unreachable because they have private address. So, how nodes from DC1 are supposed to replicate data to nodes from DC2? It seems assigning broadcast_address the public IP is not enough.<br /> What do I miss?</p> <p>Thank you,<br /> Andrey </p>