If you use Pega Platform™ decision management capabilities, Pega Platform uses Cassandra as the underlying storage system for the Decision Data Store (DDS), which manages the Cassandra cluster and stores decision management data in a Cassandra database. Future versions of Pega Platform will no longer support deployments on embedded Cassandra. In Pega Platform version 8.6, deployments using embedded Cassandra are deprecated but still work. To ensure future compatibility, do not create any new installations using embedded Cassandra.