Use the datacenter replication strategy and try it with that so you tell cassandra all your data centers, racks, etc.
Dean From: Bryce Godfrey <bryce.godf...@azaleos.com<mailto:bryce.godf...@azaleos.com>> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Date: Thursday, October 25, 2012 11:44 AM To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Subject: High bandwidth usage between datacenters for cluster We have a 5 node cluster, with a matching 5 nodes for DR in another data center. With a replication factor of 3, does the node I send a write too attempt to send it to the 3 servers in the DR also? Or does it send it to 1 and let it replicate locally in the DR environment to save bandwidth across the WAN? Normally this isn’t an issue for us, but at times we are writing approximately 1MB a sec of data, and seeing a corresponding 3MB of traffic across the WAN to all the Cassandra DR servers. If my assumptions are right, is this configurable somehow for writing to one node and letting it do local replication? We are on 1.1.5 Thanks
