#HP NONSTOP SOFTWARE#
#HP NONSTOP SERIES#

NonStop systems feature a massively parallel processing (MPP) architecture and provide linear scalability. Average availability levels of 99.999% have been observed.

The HPE Integrity NonStop computers are a line of fault-tolerant server computers based on the Intel Xeon processor platform, and optimized for transaction processing. The systems support relational database management systems like NonStop SQL and hierarchical databases such as Enscribe. Should the primary stop, the backup steps in to resume execution using the current transaction. That is accomplished using a pair of processes where one process performs all the primary processing and the other serves as a 'hot backup', receiving updates to data whenever the primary reaches a critical point in processing.

#HP NONSTOP SOFTWARE#

There are also features designed into the software that allow programs to be written as continuously available programs. The operating system continually monitors the status of all components, switching control as necessary to maintain operations. The operating system and application are both designed to support the fault tolerant hardware. The operating system as a whole is branded NonStop OS and includes the Guardian layer, which is a low-level component of the operating system and the so-called OSS personality which runs atop this layer, which implements a Unix-like interface for other components of the OS to use. Data integrity is maintained during those takeovers no transactions or data are lost or corrupted. It works with process pairs and ensures that backup processes on redundant CPUs take over in case of a process or CPU failure. NonStop OS is a message-based operating system designed for fault tolerance. That requirement was removed in 1983 with the introduction of the Transaction Monitoring Facility (TMF), which handles the various aspects of fault tolerance on the system level.

Д®arly 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) running on the Intel x86 chip were introduced. In 2005, the current product line of 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, telecommunication providers 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, HPE also developed the NonStop OS operating system for them. It is currently offered by Hewlett Packard Enterprise since Hewlett-Packard Company's split in 2015.

#HP NONSTOP SERIES#

NonStop is a series of server computers introduced to market in 1976 by Tandem Computers Inc., beginning with the NonStop product line, which was followed by the Hewlett-Packard Integrity NonStop product line extension. ( Learn how and when to remove this template message)

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