100
0
All posts
The Missing Link?
Recently I wrote up some initial results of using OA37826 data in Coupling Facility Topology Information - A Continuing Journey . That post in turn followed on from
System zEC12 CFLEVEL 18 RMF Instrumentation Improvements . Since then an interesting thing happened - and sooner than I thought it would:
I got some data with a broken piece of Coupling Facility (CF) link infrastructure.
Lest you... [More]
|
We Have Residents!
Back in May I wrote about a new batch residency planned for this October and invited good people to apply to join the team. It's been very pleasing how many people applied to be residents and the high quality of the entrants: It was genuinely difficult to pick the eventual team. We also had to reduce the scope a bit - which was a disappointment to both Frank Kyne and I. So, if you didn't get... [More]
|
Refactoring REXX - Temporarily Inlined Functions
You could consider this another in the Small Programming Enhancement (SPE) series.
You’ll probably also notice I’ve been doing quite a lot of REXX programming recently.
Anyway, here’s a tip for refactoring code I like. Suppose you have a line of code: norm_squared=(i-j)*(i-j)
that you want to turn into a function. No biggie: norm2: procedure
parse arg x,y
return... [More]
|
Sorting In REXX Made Easy
In REXX sorting is a fraught exercise - and you tend to have to resort to other programs to do it: DFSORT for the “heavy lifting” UNIX Sort but you might decide your sort is low volume enough to do in REXX.
The trouble is it’s difficult to write a routine that isn’t specific on how the data is sorted,
or rather how two items are compared - as we shall see. Following on... [More]
|
Min And Max Of Tokens In A String
A couple of days ago I had a need to take a REXX string comprising space-separated numbers and find their minimum and maximum values. Here's the technique I used. (When I say "space-separated" there can be one or more spaces between the numbers, but there has to be at least one.) The solution has three components: The REXX SPACE function - to turn the list into a comma-separated string of... [More]
|
Coupling Facility Topology Information - A Continuing Journey
9 months on from
this post and I finally get some time to enhance my Coupling Facility reporting. If you recall I mentioned
OA37826 , which provides new SMF 74 Subtype 4 data and fields in the RMF Coupling Facility Activity report - in support of enhancements in CFLEVEL 18. [1] I also mentioned that my 74–4 code needed reworking to properly support the Remote Coupling Facility Section... [More]
|
Why Do I Program In <insert language name here>?
I’ll admit it: I have a dirty little secret. All I can say is it was in my youth - and I didn’t know any better. And folks I’m exclusively revealing my secret here in this blog… I learned to program in BASIC. Actually the “I didn’t know any better” bit is a lie: My Dad can attest to the fact he had Elsevier Computer Monographs in the house, which I read... [More]
|
Recent Conference Presentations
I’ve been fortunate enough to speak at two conferences in the past month: UKCMG Annual Conference - in London in May System z Technical University - just outside Munich in June I presented three different sets of material, with very little overlap: Time For Dime Life And Times Of An Address Space DB2 Data Sharing Performance The first two were given at both conferences and the third one only... [More]
|
Dragging REXX Into The 21st Century?
I like REXX but sometimes it leaves a little to be desired. This post is about a technique for dealing with some of the issues. I present it in the hope some of you will find it worth building on, or using directly. Note: I’m talking about Classic REXX and not Open Object REXX . List Comprehensions are widespread in modern programming languages - because they express concisely otherwise... [More]
|
Data Collection Requirements
Over the years I’ve written emails with data collection requirements dozens of times, with varying degrees of clarity. It would be better, wouldn’t it, to write it once. I don’t think I can get out of the business of writing such emails entirely but here’s a goodly chunk of it. Another thing that struck me is that the value of some types of data has increased enormously... [More]
|
