This is true. Most companies either start using Cassandra when their existing database infrastructure is struggling with a particular workload or they're plann

This is true. Most companies either start using Cassandra when their existing database infrastructure is struggling with a particular workload or they're planning a new feature that would be prohibitively difficult or expensive with an RDBMS. The one exception to this might be a need for higher availability, especially if expanding to multiple datacenters is part of the plan.