Cassandra: Open-Source NoSQL Database for High Availability and Scalability

Cassandra is a distributed NoSQL database management system designed to handle large amounts of data across multiple servers. It was initially developed by Facebook and is now an open-source project managed by the Apache Software Foundation. Cassandra is optimized for high availability, fault tolerance, and scalability, making it a popular choice for applications that require high performance and low latency. It uses a peer-to-peer architecture and a ring-based data distribution model, making it easy to add or remove nodes from a cluster without downtime. Cassandra supports a flexible data model, allowing users to store and access structured, semi-structured, and unstructured data. It also provides a query language called CQL (Cassandra Query Language) for data manipulation and retrieval.