The HP NonStop OS (operating system) provides the fault-tolerant software foundation for HP Integrity NonStop and HP Integrity NonStop X servers. The NonStop OS delivers fault tolerance through multiple levels of error detection, fault isolation, and workload takeover capabilities for application and database survivability on both a local and global scale. As a result, HP NonStop servers can detect, isolate, and recover from hardware and software failures without affecting critical applications and their users.
The proven reliability and virtually unlimited scalability of HP NonStop servers are enabled by the HP NonStop OS, which combines the scalability of shared-nothing, massively-parallel processing architecture of NonStop servers with industry-leading application availability and uncompromising data integrity. POSIX compliant NonStop OS provides industry-standard application programming interfaces (APIs) and services. Tight integration between the HP NonStop OS and the HP NonStop SQL database enables absolute control over concurrent mixed-workload environments.