HP OpenVMS Technical Journal V3 - January 2004

This HP OpenVMS Technical Journal features a diverse collection of articles covering best practices and advancements in OpenVMS development and system management.

"Programming with TCP/IP – Best Practices" guides intermediate TCP/IP programmers in building robust, scalable, and secure applications for OpenVMS. It details the phases of network program structure (local context, connection, data transfer, shutdown), the choice between UDP and TCP protocols, handling multihomed configurations, using protocol-independent APIs (IPv4/IPv6), and optimizing socket options and data transfer methods.

"TimeLine-Driven Collaboration with 'T4 & Friends'" introduces the T4 & Friends toolkit and the TimeLine Collaboration (TLC) format as a time-saving approach to OpenVMS performance analysis. It highlights the system's ability to collect, synchronize, visualize, and report on performance data, promoting collaboration and efficient problem identification through graphical analysis and "Before-and-After" comparisons.

"Cluster Test Manager (CTM) for OpenVMS" describes a powerful framework for managing extensive and complex testing in OpenVMS cluster environments. It covers CTM's heterarchical design for fault tolerance, dynamic management of testing resources, use of specific data patterns for corruption detection, and the role of "pulses" in varying test loads to uncover intermittent problems.

"Digital Signature in Automatic Email Processing: A Customer Case Study" presents the Message Verify (MV) system, an OpenVMS-based solution for automating digital signature verification in email and web forms. This system enhances sender authentication, message integrity, and efficiency for applications like Internet domain registration, detailing its architecture, databases, and security considerations.

"Native 64-bit Virtual Addressing for Oracle Rdb Row Caches Capability and Performance" explores the significant enhancements in Oracle Rdb Release 7.1.2, particularly its native 64-bit virtual addressing support for Row Caches on OpenVMS Alpha. This advancement allows for much larger and more efficient in-memory data caching, reducing I/O and CPU overhead, and demonstrating substantial transaction rate improvements.

"Inheritance Based Environments in Stand-alone OpenVMS Systems and OpenVMS Clusters" proposes an inheritance-driven approach to configuring and managing customized user and application environments in OpenVMS. By leveraging the system's logical name hierarchy and defining "axes of variation," it aims to simplify administration, reduce redundancy, and improve the scalability and maintainability of complex setups.

"Structured Programming in Assembly Language" advocates for applying structured programming principles to assembly language, specifically Macro-32. Using the "Simple Mac" macro package, it demonstrates how to introduce high-level control flow constructs to assembly code, enhancing readability, reducing errors, and improving overall program quality.

"Developing Backup Strategies That Work" provides a comprehensive guide for OpenVMS system managers on designing effective backup and restore policies. It covers critical aspects such as data zoning, disaster recovery planning, optimizing backup windows, selecting appropriate storage devices, implementing vaulting, and the crucial importance of regularly verifying backup integrity.

"Best of Ask the Wizard: Upward Compatibility and OpenVMS Releases" outlines OpenVMS's steadfast commitment to upward binary compatibility for applications and details the various types of OpenVMS releases (Major, Minor, Maintenance, Limited Hardware, Special-Purpose) along with their respective compatibility expectations and the testing mechanisms used to maintain them.

"OpenVMS System and Password Security" discusses the robust password security mechanisms within OpenVMS, including its hashed password storage and break-in evasion. It also addresses potential vulnerabilities such as password cracking tools, exposure of usernames, and covert channels, offering recommendations for strengthening security practices.