Hello from me, Mark Wilson, the incoming Editor and Producer for Cheryl Watson’s Tuning Letter. We’re proud to release the latest issue, 2024 No.4, on the publication’s website. If you’re not a subscriber yet, consider this your nudge. You can...
The world’s attention shifted to Washington D.C. recently – I mean the mainframe world, of course, as the US capital played host city to the latest SHARE.org conference. I had the pleasure of attending this excellent, well-run event, which brought together industry...
If you work with mainframes, keep reading and catch the latest from Cheryl Watson’s Tuning Letter. The quarterly Tuning Letter offers comprehensive, practical, and impartial z/OS and MVS tuning and measurement advice. We deliver the insights you need in an...
We are delighted to announce that Cheryl Watson's Tuning Letter 2025 No.2 is now available. If you haven't already subscribed, now is your chance to discover the most comprehensive body of practical and impartial z/OS, and MVS tuning and measurement advice ever...
The goal is not disruption but discovery. For decades, mainframes have been at the heart of critical industries such as finance, healthcare, government, and retail. Since IBM introduced the System/360 in 1964, these systems have earned a reputation for being reliable,...
Do more at the Core. Built to Learn, Engineered to Lead. The GS-UK In-Person Conference 2025 will be held on Monday, 3 November to Thursday, 6 November 2025, at Whittlebury Hall, Northamptonshire. This year’s theme is Do more at the Core. Built to Learn, Engineered to...
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...
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...
The Latest Tuning Letter issue is out now! Subscribers to Cheryl Watson’s Tuning Letter will find the newest issue, 2026 No.1, on our Tuning Letter website. If you are not a current subscriber yet, sign up today! This subscription-only resource is available to both...
The IBM 360 mainframe made its debut in April 1964. With the unprecedented ability to perform 229,000 calculations per second, it became the enterprise platform for transaction-heavy, critical applications. With the emergence in the mid-1980s of mid-range systems...
