Apache Cassandra

Apache Cassandra is an open-source, distributed NoSQL database designed for handling massive amounts of data across many commodity servers, providing high availability with no single point of failure. Its architecture is masterless, ensuring fault tolerance and linear scalability. Cassandra supports replicating data across multiple datacenters, reducing latency and ensuring data survival during regional outages. It’s built for applications that can’t afford data loss, even during datacenter failures. Cassandra's key features include tunable consistency, powerful dynamic data modeling, and a flexible schema. It's used in a wide variety of applications, including social media, IoT, and financial services, where scalability and high availability are critical. Cassandra's zero copy streaming enhances elasticity, especially in cloud and Kubernetes environments.