I'm considering storing an abstract of the data in Cassandra in a regular RDBMS so reporting tools can use them. Cassandra will contain the core data, while a regular RDBMS may add more contextual data that does not need to clutter up the network connections because it is being replicated.
In order to implement this in a good and stable style, I would like to have some kind of notification system whenever a Cassandra nodes updates a CF. Maybe a callback or listener similar to IEndPointStateChangeSubscriber, but then on CF.
Is this possible?