YottaDB

YottaDB is an open-source, high-performance database management system designed for mission-critical applications, particularly in healthcare and other industries requiring robust data integrity and scalability. Originally developed as an extension of the Global Database (GDB) system, YottaDB is widely used in the United States healthcare sector, notably for electronic health record (EHR) systems. It is known for its ability to handle large volumes of data efficiently while maintaining high availability and reliability.

YottaDB supports a multi-user environment with concurrent access, making it suitable for environments where real-time data processing is essential. The system employs a key-value data model, allowing for fast retrieval and manipulation of data based on unique keys. It also features a high degree of data persistence, ensuring minimal data loss even in the event of system failures.

The database is written in C and is designed to be portable across various operating systems, including Unix-like systems and Windows. YottaDB includes a built-in query language called MUMPS (Massachusetts General Hospital Utility Multi-Programming System), which is optimized for its data model. This language enables developers to perform complex operations efficiently, such as database queries, updates, and transactions.

YottaDB is licensed under the Apache License 2.0, making it freely available for use, modification, and distribution. The project benefits from an active community and ongoing development, with contributions from both open-source developers and commercial entities. Its architecture emphasizes performance, scalability, and compatibility with legacy systems, making it a preferred choice for applications requiring long-term stability and high performance.