NonStop Hardware
The HP Integrity NonStop computers are a line of fault-tolerant server computers, optimized for transaction processing and providing an extreme level of availability and data integrity. Average availability levels of 99.999% have been observed. NonStop systems feature a massive parallel processing (MPP) architecture and provide linear scalability. Each CPU (systems can be expanded up to over 4000 CPUs) runs its own copy of the OS. This is a "share nothing" arrangement and no "diminishing returns" occur as more processors are added.
Due to the integrated hardware/software stack and a single system image for even the largest configurations, system management requirements for NonStop systems are rather low. In most deployments there is just a single production server, not a complex server farm.
Most customers also have a backup server in a remote location for disaster recovery. There are standard products to keep the data of the production and the backup server in sync, hence there is fast takeover and no data loss also in a disaster situation with the production server being disabled or destroyed.
HP also developed a data warehouse and business intelligence server line, HP Neoview, based on the NonStop line. It acted as a database server, providing NonStop OS and NonStop SQL, but lacked the transaction processing functionality of the original NonStop systems. The line was retired, and no longer marketed, as of January 24, 2011.
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