![]() Įarly NonStop applications had to be specifically coded for fault-tolerance. Sales of the Itanium-based systems ended in July 2020. In 2014, the first systems "NonStop X" (or TNS/X), based on Intel x86-64 processors, were introduced. ![]() In 2005, the HP Integrity "NonStop i" (or TNS/E) servers, based on Intel Itanium microprocessors, was introduced. Originally introduced in 1976 by Tandem Computers Inc., the line was later owned by Compaq (from 1997), Hewlett-Packard Company (from 2003) and Hewlett Packard Enterprise (since 2015). These systems are often used by banks, stock exchanges, payment applications, retail companies, energy and utility services, healthcare organizations, manufacturers, telecommunication providers, transportation and other enterprises requiring extremely high uptime. When a mainline component fails, the system automatically falls back to the backup. ![]() To circumvent single points of failure, they are equipped with almost all redundant components. NonStop systems are, to an extent, self-healing. Because NonStop systems are based on an integrated hardware/software stack, Tandem and later HPE also developed the NonStop OS operating system for them. The original NonStop product line is currently offered by Hewlett Packard Enterprise since Hewlett-Packard Company's split in 2015. It was followed by the Tandem Integrity NonStop line of lock-step fault tolerant computers, now defunct (not to be confused with the later and much different Hewlett-Packard Integrity product line extension). NonStop is a series of server computers introduced to market in 1976 by Tandem Computers Inc., beginning with the NonStop product line.
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