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More Maintainable DFSORT
While writing
Creating JSON with DFSORT I realised one statement in particular is difficult to read and maintain.
It’s this one: INREC IFTHEN=(WHEN=INIT,BUILD=(SEQNUM,4,BI,
C'{"name": "',NAME,C'","number": "',NUMBER,C'"}')),
IFTHEN=(WHEN=(1,4,BI,GT,+1),BUILD=(2X,C',',5,70)),
... [More]
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Creating JSON with DFSORT
This post is yet another spin off from the residency I'm on in Poughkeepsie. I mentioned in
We Have Residents! I might do something with JSON (Javascript Object Notation) and indeed I have. But why would a residency on Batch Performance concern itself with JSON (and indeed XML, which I've also written about in the Redbook)? The reason lies in the word "modernisation".
This actually works two... [More]
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Unusual Sort Fields
While working through a scenario in our residency it became (briefly) important to be able to preserve
sort order on a field.
But this field wasn’t sorted in any recognisable way.
So the records couldn’t be sorted alphabetically or numerically.
In fact they had to be sorted so that this field was preserved in the following sequence: red orange yellow green blue violet pink white... [More]
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On The Third Day
Actually it's not been quite that bad, jetlagwise. So on this third day we're moving into the creative phase.
For example I might be writing actual Redbook text, Karen might be writing actual COBOL, and Dean might be telling TWS to do his actual bidding. The past two days have been filled with kick off and getting stuff set up.
We did, though, sketch out an outline of the Redbook.
So that gives... [More]
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My Considered Opinion?
If you’re looking for a considered opinion you came to the wrong place . Or so anyone reading
Down In The Dumps? shortly after reading
Enigma And Variations Of A Memory Kind might conclude. It’s possibly a fair cop, possibly not, but it got me thinking… In reality life is a sequence of experiences, many of which we hopefully learn something from.
But it’s a journey of... [More]
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Down In The Dumps?
That’s such a horrible pun I must’ve used it before.
If so sorry (but not very). This post follows on from
Enigma And Variations Of A Memory Kind in a way.
In that post I mentioned DUMPSRV, in almost a throwaway fashion:
I happened to notice the memory usage in SMF 30 by DUMPSRV grew at just the point free memory took a dip. This post takes that idea and extends it a little - and... [More]
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What I'm Looking Forward To In z/OS 2.1
As I mentioned in
We Have Residents! we'll be working with a z/OS 2.1 system in October.
In fact I've already logged on to it.
I might even get to play with it before the residency starts, depending on current workload - but the priority is to hit the ground running by ensuring the environment is set up to our liking and that we have test data.
(And then there are those day-to-day... [More]
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Enigma And Variations Of A Memory Kind
This post, unlike the previous one, is “on topic” for a Mainframe Performance Topics blog.
I hope nobody’s relying on that.
In fact I joke about renaming blog this to “Mainframe, Performance, Topics” the next time I ask for the header to be updated.
In fact I just might. I recently got some data from a customer that I thought showed a bug in my code. Instead it... [More]
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Coupling Facility Duplexing Reporting Warm-Over
In my experience Coupling Facility Duplexing configuration and performance is something that tends to get neglected - once the initial configuration decisions have been made.
After all it’s rare that customers rework their Duplexing design. Over the past few weeks I’ve been comprehensively reworking my Coupling Facility tabular reporting, as I recently mentioned in
Coupling Facility... [More]
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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]
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