AllCode has designed, configured, installed, and operated Apache Cassandra implementations for many large banks.
Whenever you're installing a new DataStax\Apache Cassandra cluster, you need to remember to remove the user cassandra. We've seen this at a couple of customer installations now. If you do not change the user cassandra or at least alter the roles for the user cassandra. then you're liable to see all sort of nasty repercussions. [...]