Recent Articles
Turning Nightly Downtime into a Competitive Advantage with VSAM File-Sharing
If you run on IBM Z, you may still stop CICS overnight so batch jobs can update VSAM files. That pause might be necessary today, but it is no longer a requirement. We will show you how to remove the trade-off between fresh data and uninterrupted access with VSAM...
IBM z17 NTS Enhancements: Securing Time Synchronization
In October 2025, Planet Mainframe published the first article of this two-part series on IBM z17 Time Synchronization Enhancements. That article focused on time synchronization resiliency and accuracy enhancements introduced on IBM z17. This article continues with a...
What’s Inside – Cheryl Watson’s Tuning Letter
The latest Tuning Letter, 2025 No.3, is out now! Subscribers to Cheryl Watson’s Tuning Letter can find the latest issue, 2025 No.3, on our Tuning Letter website. If you are not a current Tuning Letter subscriber, check the website for information about subscription...
The Spectrum of Trust: How Mainframers Are Embracing Agentic AI
A few years ago, the idea of letting artificial intelligence (AI) tweak a production mainframe system on its own would’ve made even the most daring system programmer break out in a cold sweat. We would have heard, “Let the machine make the change? Not on my watch.” ...
Mainframe Artificial Intelligence Quiz
At Planet Mainframe, we’re spending the month of November focusing on AI and the mainframe. Once viewed as separate worlds, AI and IBM Z now work hand in hand to deliver real-time insights, predictive analytics, and intelligent automation across enterprise-scale...
NEWS – Granite 4.0, Free Cybersecurity Labs, and more
IBM Announces Granite 4.0 Free (Cybersecurity) Labs! Upcoming IBM Z Day Chase Card Decommissioning All Mainframe Code, with AI Assistance IBM z/OS Core Collection v1.15.0 GA ReleasedIBM Announces Granite 4.0 IBM has introduced Granite 4.0, initiating a new era for its...
Actual Intelligence in z/OS Performance and Capacity Planning
It is exciting to be part of the world of computer performance at the dawn of AI. Many companies are heavily investing in Artificial Intelligence (AI) with only a few crude implementations having materialized thus far. As a performance guy, I can say it is important...
AI and ethics and mainframes
When Beliefs Shape Machines Imagine two people talking in a bar—one believes in God, and the other doesn’t. One swears by Apple, the other by Android. One supports Trump, the other can’t stand him. It doesn’t matter which side you’re on; the point is that people...
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The good, the bad and the ugly: generative AI and cybersecurity
Putting the AI into mAInframe security Artificial intelligence can be as much a help as a threat: a powerful tool in the hands of either the good, the bad or the ugly. Today’s threat landscape and cybersecurity requirements are more complex and challenging than ever....
Mainframes: Silent Giants of the Digital Era
In the whirlwind of technological advancements, it's easy to overlook the foundational pillars that support our digital world. Mainframes, often perceived as relics of a bygone era, continue to play a pivotal role in orchestrating the symphony of modern data. These...
Thoughts from a Mainframe on Halloween
It was a dark and stormy night in the data center. 🌩️ The fans hummed softly, and the LEDs blinked like little ghosts in the darkness. I had experienced many Halloween nights as a mainframe, but this one was different. There was an eerie presence in the air — and it...
Defense against the dark arts — mainframe security
Mainframers who thought the mainframe was too difficult a platform to hack are few and far between these days. However, mainframes can be hacked, and they are being hacked.In terms of security, what spells, incantations, and practices should organizations employ to...
Advancing Mainframe Security with Ethical Mainframe Hacking
Written by: David Bruce Put on your hoodie and head for a darkened room! Oh. Wait. Sorry, that’s just the movie version. Despite the stereotype, hackers are real, and they’re dangerous! It’s now their full-time job and they are doing it well. In July, ransomware...
Security has no boundaries
In today's complex cybersecurity landscape, staying current with software updates is just one piece of the puzzle. To truly protect your organization, it's essential to prioritize comprehensive security measures beyond routine patching. How CrowdStrike Changed...
All Things Cyber Security
October may be the month of falling leaves and pumpkin spice, but it is also the time when we turn our attention to all things cybersecurity. And, in the context of mainframe cybersecurity, observability is an essential piece of the puzzle. By maintaining...
Zero trust: Is server level or perimeter protection best?
If you’re running a big server like a mainframe, a zero trust strategy means you shouldn’t trust anything outside that box. If it’s your responsibility to protect the mainframe, you must ensure the right mechanisms are in place on the box itself. If you're in charge...
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Upcoming Events
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Virtual CICS User Group | The IT Stairway to Heaven. CICS Testing Pyramid: From Unit to Integration to Production-Like Environment
Zoom - Virtual MeetingEffective testing is essential for building robust systems. Dive deep into a structured approach to the testing pyramid for CICS applications. Using Test4z, we will demonstrate how unit tests form […]
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Virtual Db2 User Group | January 20, 2026
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Virtual IMS User Group | February 10, 2026
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Virtual CICS User Group | March 17, 2026
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❓ History of Artificial Intelligence Trivia
November at Planet Mainframe is all about AI, and you don’t need us to tell you that artificial intelligence has now been integrated into many of our daily routines. But long before AI became a household term, IBM was shaping the foundations of this increasingly...
IBM’s decision to discontinue support for the zPDT standalone offering threatens the mid-tier ISV market
IBM’s zPDT Decision Risks Mid-Tier ISVs and Mainframe Innovation I’ve been a passionate mainframe (System z) advocate for over 45 years and a staunch supporter of IBM and most of their decisions. However, when I received an email from IBM on 30 September 2025...
Data Integrity Award Winners, Workload Automation in Industry Report, and more
IBM Announces New Platform for Financial Institutions and Regulated Enterprises Entering the Digital Asset Economy Precisely Announces 2025 Data Integrity Award Winners Driving AI Innovation, Business Impact, and Societal Good BMC Selected as Overall Leader for...
Mainframe Artificial Intelligence Quiz
At Planet Mainframe, we’re spending the month of November focusing on AI and the mainframe. Once viewed as separate worlds, AI and IBM Z now work hand in hand to deliver real-time insights, predictive analytics, and intelligent automation across enterprise-scale...
NEWS – Granite 4.0, Free Cybersecurity Labs, and more
IBM Announces Granite 4.0 Free (Cybersecurity) Labs! Upcoming IBM Z Day Chase Card Decommissioning All Mainframe Code, with AI Assistance IBM z/OS Core Collection v1.15.0 GA ReleasedIBM Announces Granite 4.0 IBM has introduced Granite 4.0, initiating a new era for its...
TRIVIA – Penetration Testing
Mainframes have long been known for their unmatched reliability and security—but even the most trusted systems can hide surprises beneath the surface. As technology evolves, so do the tactics of those trying to exploit it. Penetration testing (pen testing), or...