In the documentation of DSE 2.0 there is a chapter about "Elastic Workload Re-provisioning" (http://www.datastax.com/docs/datastax_enterprise2.0/workload_reprovisioning) but it the DSE 3.1 documentation this part is missing.
Is the old documentation still valid?
Is there a simple guide what steps are neccessary to change a "5 node real-time cluster" into a "3 node realtime, 2 node analytics cluster" when there is already data in all 5 nodes?