What is the Cassandra version to use when clustering Message Broker 2.1.0 with external Cassandra?Cassandra 1.2.x
What is the recommended hardware configuration for running a Message Broker cluster?It depends on the number of Message Broker nodes. The Cassandra server should be running on 2 CPU - 6GB Memory (minimum), and Message Broker can run as a 2 Core, 4 GB server.
Can both Business Activity Monitor and Message Broker use the same Cassandra cluster?Yes. They are in independent key spaces, so they can use the same Cassandra cluster.