Amazon Keyspaces (for Apache Cassandra) is now generally available in 11 additional Regions, allowing customers in those Regions to build Cassandra-compatible applications with lower latency while keeping their data within the Region to meet data residency requirements.. Amazon Keyspaces (for Apache Cassandra) is a scalable, highly available, and managed Apache Cassandra–compatible database service. Amazon Keyspaces is serverless, so you pay for only the resources that you use and you can build applications that serve thousands of requests per second with virtually unlimited throughput and sto