Operations 

You can run DSE Search on one or more nodes. Typical operations including configuration of nodes, policies, query routing, balancing loads, and communications.

You can run Solr on one or more nodes. DataStax does not support running Solr and Hadoop on the same node, although it's possible to do so in a development environment. In production environments, separate workloads by running real-time (Cassandra), analytics (Hadoop), or DSE Search (Solr) nodes on separate nodes and in separate datacenters.