NonStop SQL is a commercial relational database management system that is designed for fault tolerance and scalability, currently offered by Hewlett Packard Enterprise.
The product primarily is used for online transaction processing and is tailored for organizations that need high availability and scalability for their database system.
Typical users of the product are stock exchanges, telecommunications, POS, and bank ATM networks.
First released in 1987, a second version in 1989[2] added the ability to run queries in parallel, and the product became fairly famous for being one of the few systems that scales almost linearly with the number of processors in the machine: adding a second CPU to an existing NonStop SQL server almost exactly doubled its performance.
Parts of the Neoview code base were open sourced in 2014 under the name Trafodion, which is now a top-level Apache project.