I wonder what it the right way to configure replication in Cassandra cluster.
I need to have 3 copies of my data in a cluster consisting of 6 nodes. 3 of these nodes are in one datacenter - let's call it DC1 - and 3 in another, DC2. There is a significant latency between these datacenters and originally my application is going to be configured to only talk to 3 local cassandra nodes, without auto-discovery. It looks like I can use org.apache.cassandra.locator.NetworkTopologyStrategy for a placement_strategy in keyspace definition and provide values for strategy_options from $CASSANDRA_HOME/conf/cassandra-topology.properties. It does not seem to be well-documented and I would like additional examples to configure this option. However, org.apache.cassandra.locator.NetworkTopologyStrategy is not flexible enough because it requires changes in $CASSANDRA_HOME/conf/cassandra-topology.properties every time the cluster configuration changes, and that requires changes in keyspace definition as well. Thus does not seem to scale well. Is there elaborated examples for org.apache.cassandra.locator.NetworkTopologyStrategy and keyspace configuration? Do I have any other options for my configuration? Thank you, Oleg
