YottaDB

YottaDB is an open-source, high-performance NoSQL database management system that is optimized for high-speed transactions and real-time analytics. It’s built from the ground up to support high-performance, high-concurrency, and high-availability use cases.

YottaDB provides a number of features to support these use cases, including:

• Multi-threading, which allows it to handle many concurrent requests and transactions
• Multi-site replication, which allows for high-availability and disaster recovery
• Multi-data center replication, which allows for geographically distributed data centers
• Transactional semantics, which provide a consistent, isolated, and durable view of the data
• Support for various programming languages such as C, C++, Java, Python, Perl, and more.

YottaDB is also open-source and can be self-hosted. It runs on Linux, UNIX and Windows platforms. It is designed for high-performance and high-concurrency use cases and is well suited for applications such as financial systems, healthcare systems, and telecommunications systems.