16
with Tags:
batch
X
X
I Said "Parallelise" Not "Paralyse" Part 2 - Classification
I hope you don't get the idea I'm overly into rigour, talking about Classification. But I think it has to be done - to provide terminology for this series of posts.
This is the second of four posts on Batch Parallelism, following on from
Motivation .
If I think about how parallelism works in batch it broadly falls into two camps:
Heterogeneous
Homogeneous
( If you look these... [More]
|
I Said "Parallelise" Not "Paralyse" Part 1 - Motivation
I have enormous trouble pronouncing "parallelise" right - and not saying "paralyse". It's true, and I bet many of you have the same trouble (sober or not). It's on a par with "red lorry yellow lorry" or "the Leith Police dismisseth us".
But it's a word I think we're going to have to get used to pronouncing right. And this post will explain why.
This... [More]
|
CICS and Batch
In my experience there are two kinds of CICS installations: Those that take CICS down at night - to run the Batch - and those that don't.
There is a loose correlation between what the data manager is and which approach is taken: VSAM-based CICS applications tend to be less 24x7 than DB2 ones, though it's not that clear cut.
This post is about how you (really I) might glean how you... [More]
|
DB2 Package-Level Statistics and Batch Tuning
I don't know how many years it's been since DB2 Version 8 was shipped but I've FINALLY added support for some really useful statistics that became available with that release. As so often happens I was caused to open up my code because of some customer data that exposed a problem in it: The customer sent DB2 Version 8 SMF 101 Accounting Trace data that contained Unicode. In particular DB2... [More]
|
Touring The Upcoming Batch Optimization On z/OS Redbook
As mentioned here , I recently participated in a residency in Poughkeepsie. Our task was to write the "Batch Optimization on z/OS" redbook that we hope will get out soon (though I think early next year is the most realistic timescale). These past two weeks I "toured" the redbook in the Nordics: 5 cities in 2 weeks (Helsinki, Copenhagen, Oslo, Stockholm and Aarhus). I really... [More]
|
Batch Capacity Planning, Part 2 - Memory
I can't believe it's been almost a week since I wrote Batch Capacity Planning, Part 1 - CPU . Where did the time go? Re-reading it I'm struck by the overwhelming theme of Batch's unpredictability and lumpiness. This is true of memory, as well, but to a much lesser degree. Why to a lesser degree? Well, in most systems I look at the memory usage is mostly fairly constant and dominated by big... [More]
|
Batch Capacity Planning, Part 1 - CPU
It's been a week since the following was posted in IBM-MAIN: Batch Capacity Planning - BWATOOL? So far there's been no reply. Though a little disappointed, I'm not surprised. "Disappointed" as I was looking for a good debate (even though it wasn't me who asked the question). "Not surprised" as I think the subject of Batch Capacity Planning is a tough one. The original post... [More]
|
Another Graph I'm NOT Going To Share With You - Batch Window Reduction Expectations
In WLM Velocity - "Rhetorical Devices Are Us" I mentioned a graph I wasn't going to publish - essentially to protect a customer. In this post I'm again going to describe a graph I have (at least in my head) without publishing it. (And for essentially the same reasons.) I hope you find it useful, however:
I've been acquainted with a lot of customer Batch Window Reduction projects,... [More]
|
Back From Vacation And Raring To Go - To Poughkeepsie
Usually when I go away on holiday I bring something back with me. Often in the form of fresh ideas. This year it's been such a hectic one that all I did was to flake out. So no new ideas this time. Perhaps that's a good thing, perhaps not. But I think I did achieve something: Mental decluttering. So I can, for example, look at stuff I was working on with a fresh take. And the timing is... [More]
|
An Experiment With Job Naming Conventions
It may surprise you to know I hate asking questions to which I already know the answers. And I hate even more "leaving understanding on the table". Let me put it more positively: I love it when I can glean new insights into existing data. This post is about precisely that: An experiment in gleaning extra understanding... In Batch Architecture, Part Zero and follow-on posts I talked... [More]
|
