OpenVMS

OpenVMS, originally developed by Digital Equipment Corporation (DEC), is a robust and secure operating system primarily designed for mission-critical and high-availability computing environments. It has a long history and has been used in various industries, including finance, healthcare, and manufacturing. OpenVMS offers several unique features and characteristics:

  1. Reliability and Availability: OpenVMS is renowned for its exceptional reliability and availability. It includes features like clustering, hot-swappable components, and error-checking mechanisms to minimize downtime.
  2. Security: OpenVMS places a strong emphasis on security, with features like access controls, auditing, and authentication mechanisms. It is designed to meet stringent security requirements and is often used in environments where data protection is paramount.
  3. Clustering: OpenVMS supports clustering, allowing multiple systems to work together as a single, highly available entity. This enables load balancing and failover capabilities, ensuring uninterrupted service.
  4. High Performance: OpenVMS is optimized for performance and can handle large workloads efficiently. It supports symmetric multiprocessing (SMP) and offers excellent support for I/O operations.
  5. Legacy Compatibility: OpenVMS has a long history, and many organizations rely on legacy applications written for this platform. It provides a high degree of backward compatibility to ensure these applications continue to function.
  6. VAX and Alpha Architectures: OpenVMS was originally developed for VAX hardware and later extended to DEC Alpha architecture. It’s known for its portability across different hardware platforms.
  7. Itanium and x86-64 Support: In addition to VAX and Alpha, OpenVMS has been ported to the Intel Itanium architecture and x86-64 (64-bit x86) hardware, extending its reach to modern server hardware.
  8. Advanced File System: OpenVMS features the Files-11 file system, which provides advanced features like versioning, file-level security, and journaling for data integrity.
  9. DCL Command Language: OpenVMS uses the Digital Command Language (DCL) for system administration and scripting. It is a powerful and scriptable command-line interface.
  10. Application Ecosystem: OpenVMS has a rich ecosystem of applications and development tools. It supports various programming languages, including Fortran, COBOL, C, and more.
  11. Web and Network Capabilities: OpenVMS has evolved to include web and network capabilities, allowing organizations to modernize and integrate their systems with web services and networked environments.
  12. Community and Support: While DEC was acquired by Compaq, which was later acquired by HP, there remains a dedicated OpenVMS community that provides support and resources for users of the platform.
  13. OpenVMS on x86: In recent years, there have been efforts to port OpenVMS to x86-64 hardware, making it more accessible to organizations seeking to modernize their infrastructure.

OpenVMS continues to be used in specialized environments where its reliability, security, and compatibility with legacy systems are critical. While it has a niche presence compared to mainstream operating systems, it remains a trusted choice for specific high-stakes applications and industries.

Key terms in plain language

Open a term for a concise explanation of language used on this page.

Fiber Internet

Internet delivered through strands of glass using light. Fiber commonly supports high capacity, low latency, and strong upload performance, but availability must be confirmed for the exact address.

Cybersecurity

The practices and controls used to protect identities, devices, networks, applications, and data from unauthorized access, disruption, or manipulation.

Zero Trust

A security model that does not automatically trust a user or device because of its location. Access is continuously verified and limited to what is necessary.

SASE

Secure Access Service Edge combines networking and security capabilities in a cloud-delivered architecture so users and locations can receive consistent policy wherever they connect.

Identity and Access Management (IAM)

The systems and policies that determine who a user is, what resources they may access, and how that access is authenticated and reviewed.

Multi-Factor Authentication (MFA)

A login control requiring more than one form of verification, such as a password plus an authenticator app, security key, or biometric factor.