Category: Tandem

HP NonStop (HPE) fault tolerant servers originally developed by Tandem Computers – Summary

My IT career between the years 1990 and 2014, involved significant programming and large projects for Tandem HP NonStop servers.

HP NonStop Tandem Computers

HP NonStop refers to the line of fault-tolerant servers and software originally developed by Tandem Computers and now owned by Hewlett Packard Enterprise (HPE). These systems are designed for continuous operation and uninterrupted transaction processing by using redundant hardware components and independent processors to automatically failover in the event of a failure, ensuring high availability for critical applications in banking, telecommunications, and healthcare. 

Origins and Evolution

  • Tandem Computers: Founded in 1974, Tandem introduced the NonStop system, a pioneering fault-tolerant computer with no single point of failure, revolutionizing continuous availability for online transaction processing. 
  • Acquisitions: Tandem Computers was acquired by Compaq in 1997, and Compaq was later acquired by Hewlett-Packard (HP) in 2001. 
  • Current Ownership: After the split of HP into Hewlett Packard Enterprise (HPE) and HP Inc. in 2015, the NonStop product line became part of HPE. 

Key Features and Uses

  • Fault Tolerance: The systems are built with redundant components, including identical processors and storage devices, allowing them to automatically detect and recover from hardware or software failures without interruption. 
  • High Availability: This fault-tolerant architecture is ideal for mission-critical applications that require constant uptime, such as financial transactions, emergency services, and large-scale banking systems. 
  • Scalability: NonStop systems are designed for scalability, able to handle large commercial workloads by adding independent processors. 
  • Dedicated Operating System: Historically, NonStop systems ran on proprietary software like the Guardian operating system and used the TAL programming language. 
  • Specialized Database: The line includes NonStop SQL (currently SQL/MX), a relational database designed for the high availability and scalability needs of these systems. 

Tandem Computers, NonStop Kernel (NSK), a Timeline of HP NonStop

Tandem Computers, NonStop Kernel (NSK), a timeline of the history and evolution of HP NonStop.

Note: some texts below AI generated for completeness.

Tandem’s NonStop computers, founded by Jimmy Treybig in 1974, were a revolutionary fault-tolerant system that sold its first server in 1976 to Citibank, achieving rapid growth through the 1980s before later becoming part of Compaq (1997), Hewlett-Packard (2003), and finally Hewlett Packard Enterprise (HPE). Key milestones include the 1983 introduction of the Transaction Monitoring Facility (TMF), which simplified development by handling fault tolerance at the system level, the introduction of the first NonStop X x86-based systems in 2014, and the phasing out of Itanium-based models by 2020. 

1970s

  • 1974: Tandem Computers Inc. is founded by Jimmy Treybig, with the goal of creating “NonStop” computers that don’t fail. 
  • 1975: The design of the first NonStop hardware, the Tandem/16, is completed. 
  • 1976: The first NonStop server ships to Citibank. The company experiences exponential growth. 

1980s

  • 1981: The NonStop II server is introduced, and Tandem joins the Fortune 500. 
  • 1983: The requirement for developers to code specifically for fault tolerance is removed with the introduction of the Transaction Monitoring Facility (TMF) and NonStop Tuxedo software. 
  • 1985: The first online-serviceable disk storage facilities, the V8 and XL8, are introduced. 
  • 1986: NonStop technology is used by the world’s 30 largest telecommunication companies and many top banks. 
  • 1988: Tandem acquires Ungermann-Bass, Inc. to enhance its networking capabilities. 
  • Late 1980s: A new line of NonStop systems, including the CLX, CYCLONE, and Cyclone-R, is introduced, representing a significant redesign while maintaining fault-tolerant principles. 

1990s

  • 1990: Tandem reaches its peak revenue but begins a slow decline as the market shifts to faster, cheaper systems. 
  • 1991: Tandem announces the Tandem Image Processing System for digitized document management. 
  • 1997: Tandem is acquired by Compaq, becoming a server division within the company. 

2000s 

  • 2003: Hewlett-Packard (HP) acquires Compaq, and the NonStop line becomes part of HP.
  • 2005: The HP Integrity NonStop i (TNS/E) servers, based on Intel Itanium microprocessors, are introduced.

2010s

  • 2014: The first NonStop X (TNS/X) systems, built on Intel x86-64 processors, are launched. 
  • 2015: Following the split of Hewlett-Packard, the NonStop division becomes part of Hewlett Packard Enterprise (HPE). 

2020s 

  • 2020: Sales of Itanium-based NonStop systems end, marking a major shift to x86 architecture for the product line.

The Tandem NonStop history began in 1976 with Tandem Computers’ introduction of its fault-tolerant systems for critical transaction processing. After Tandem was acquired by Compaq in 1997, the NonStop line continued under Compaq, then Hewlett-Packard (HP) in 2003, and is now part of Hewlett Packard Enterprise (HPE) following the company’s 2015 split. Key developments include the 1983 introduction of the Transaction Monitoring Facility (TMF) and NonStop Tuxedo, the 2005 arrival of NonStop i servers based on Intel Itanium processors, and the 2014 launch of the NonStop X systems using Intel x86-64 processors. 

Also;

1970s

  • 1974: Tandem Computers is founded in Cupertino, California, by Jim Treybig. 
  • 1976: Tandem introduces its first NonStop fault-tolerant system. 
  • 1970s: Tandem’s architecture is designed for continuous availability and zero data loss, becoming the dominant manufacturer of fault-tolerant computer systems for ATM networks, banks, and stock exchanges. 

1980s

  • 1983: Tandem introduces the Transaction Monitoring Facility (TMF) and the Pathway transaction management software, removing the need for applications to be specifically coded for fault tolerance. 
  • 1986: Tandem launches NonStop SQL, the first fault-tolerant SQL database, which offers unique features for data integrity across nodes and can scale performance with additional nodes. 
  • 1989: A new version of NonStop SQL adds transactions that can be spread across multiple nodes, a groundbreaking feature for the time. 

1990s 

  • 1997: Compaq acquires Tandem Computers, with NonStop becoming a server division within Compaq.

2000s 

  • 2003: Hewlett-Packard (HP) acquires Compaq, integrating the NonStop line into its operations.
  • 2005: HP introduces the HP Integrity NonStop i servers (also known as TNS/E), which are based on Intel Itanium microprocessors.

2010s

  • 2014: HP launches the first NonStop X systems (TNS/X), which are built on Intel x86-64 processors. 
  • 2015: Following the split of Hewlett-Packard, the NonStop division becomes part of Hewlett Packard Enterprise (HPE). 

2020s

  • 2020: Sales of the Itanium-based NonStop systems end. 
  • 2025 (Present): HPE continues to operate the NonStop platform, a technology that still serves critical infrastructure requiring high availability and continuous operation. 

See also : https://www.company-histories.com/TANDEM-COMPUTERS-INC-Company-History.html