Segregating workloads in a cluster 

Organize the nodes that run different workloads into virtual data centers.

A common question is how to use real-time (Cassandra), integrated Hadoop or Spark (DSE Analytics), an external Hadoop system, or DSE Search nodes in the same cluster. Within the same datacenter, attempting to run DSE Search on some nodes and real-time queries, analytics, or external Hadoop on other nodes does not work. The answer is to organize the nodes running different workloads into virtual datacenters.

Replicating data across datacenters 

You set up replication for DSE Search nodes exactly as you do for other nodes in a Cassandra cluster, by creating a keyspace. You can change the replication of a keyspace after creating it.