Category Archives: Uncategorized

(Originally posted 2019-02-20.) We just posted Episode 22 of Mainframe, Performance, Topics. It features two of the longest topics we’ve ever recorded – and we think both of these topics warrant the time. If you want to fit this into your daily commute feel free to drive round the block a few times. 🙂 TheContinue reading “Mainframe Performance Topics Podcast Episode 22 “Great App-spectations””

(Originally posted 2019-01-14.) In Paging Subsystem Design, in 2005, I opened with the words "Periodically on IBM-MAIN I’m caused to revisit something. With the advent of z990/z890 and “supposedly abundant” 🙂 real memory it seems to be time to revisit paging subsystem design.” Note the smiley is in the original. Seems funnier now. The z990/z890Continue reading “Return Of Paging Subsystem Design”

(Originally posted 2019-01-06.) This post isn’t about what a great iOS app would functionally do. It’s about what would turn a useful app into a great one. There are obvious personal biases here: Automation is important to me. I have most of the Apple ecosystem – but no HomePod speakers (yet). I really want goodContinue reading “Anatomy Of A Great iOS App”

(Originally posted 2019-01-01.) While some beer was tasted over the vacation period, this post is about a different kind of tap. During my Xmas and New Year holiday I’ve been experimenting with ways of kicking off automation that don’t involve talking to a device, or tapping on it, or typing anything. Specifically what you canContinue reading “Automation On Tap”

(Originally posted 2018-12-11.) I seem to spend a lot of time working with DB2 DDF, and it’s no wonder: Many modern applications accessing DB2 are built using it, whether through JDBC 1 or some other connective software. This post is a by-product of a serious customer situation with DDF Performance, which I don’t intend toContinue reading “DDF TCB Revisited”

(Originally posted 2018-12-08.) We released this episode a few days ago. But I only got round to writing this post today, 5 days later. That’s because I (and probably half of our listenership 🙂 ) were involved in a rather urgent piece of customer business. There are some learning points from that one, but that’sContinue reading “Mainframe Performance Topics Podcast Episode 21 “Fits and Starts””

(Originally posted 2018-11-10.) I’ve moved from editing audio on my Mac with Audacity to editing it on my iPad with Ferrite. So I thought I’d give you my impression of Ferrite. And this is an early impression. In some ways I’m as much interested in encouraging people to record as anything else. The more voicesContinue reading “Appening 7 – Ferrite Audio Editor On iOS”

(Originally posted 2018-10-31.) Recently I wrote code to “flatten” SMF 89 records – in REXX.1 Now I want to share with you some of the insights I’ve acquired from early experiments with the data.2 There are three things I’d like to share with you that you might not realise you can get from SMF TypeContinue reading “Three Early SMF 89 Results”

(Originally posted 2018-10-30.) Episode 20 marked a departure in editing terms… Previously I’d been adding chapter markers in Ferrite on iOS and editing the sound on my Mac using Audacity. However, as you’ll see in the Feedback section, some listeners wanted less aggressive (or even no) stereo. This is much easier to achieve in FerriteContinue reading “Mainframe Performance Topics Podcast Episode 20 “Two Is One And One Is None””

(Originally posted 2018-10-13.) About 18 months ago I built some automation on Mac that I found rather handy. Since I mentioned it on various forums people have wanted it – or at least to know how I built it. Given its extensibility as a method, it seemed more appropriate to dedicate this post to howContinue reading “Invoking Keyboard Maestro From PopClip”