@MiguelHenriquez  Pega platform uses a defined set of keyspaces, so OOTB, if you would connect multiple platform installations to the same external Cassandra cluster, then the platform instances would overwrite each other's data (using the same keyspaces).

However, you can prevent that from happening by setting a prconfig on each environment: dnode/keyspaces_prefix. By defining a unique prefix for each environment, each one would create its own set of keyspaces and would not access each other's data (keyspace names will no longer clash).

Implication to keep in mind is the potential impact of one environment on another, i.e. if there's a significant load on Cassandra generated by one of the environments, it can affect query performance of another.