Archive for the Category: z/OS

JMS/MQRFH2 Message Properties in “other” Folder

January 17, 2020 Roger Lacroix

On StackOverflow, someone asked about having an “other” folder (not “usr”) with an MQRFH2 (aka JMS) message. That day, I played around with a MQ/Java program that created various folders in an MQRFH2 message. i.e. When I ran a MQ/JMS program to retrieve the messages, the MQ/JMS programs simply ignore all folders outside of ‘mcd’, […]

Also posted in C, IBM i (OS/400), IBM MQ, Java, JMS, Linux, macOS (Mac OS X), Programming, Unix, Windows Comments Off on JMS/MQRFH2 Message Properties in “other” Folder

MQ Internals Explained (a little bit)

December 10, 2019 Roger Lacroix

IBM likes to market IBM MQ (aka WebSphere MQ, MQSeries) as a simple and complete solution for business’s messaging needs. Going with the KISS approach is wise (very wise in some cases). IBM talks about the 2 different messaging models that IBM MQ supports: Point-to-Point (P2P) and Publish/Subscribe (Pub/Sub). IBM will: show you how to […]

Also posted in .NET, Assembler, C, C#, C++, HPE NonStop, IBM i (OS/400), IBM MQ, Java, JMS, Linux, macOS (Mac OS X), MQ Auditor, MQ Message Encryption, Programming, Unix, Windows 2 Comments

wc3270 and IBM RDP Issue

December 9, 2019 Roger Lacroix

I use IBM’s Remote Development Program (RDP) to host my z/OS and Linux for System z LPARs. I installed the latest release of wc3270 of the x3270 project on my new Windows 10 PC and copied my settings from my old Windows 7 PC. Hence, I should be good to go but no. I have […]

Also posted in Capitalware, Open Source, Security, Windows Comments Off on wc3270 and IBM RDP Issue

IBM MQ V9.1.4 Announced

December 3, 2019 Roger Lacroix

IBM has announced IBM MQ V9.1.4 for Multiplatforms: https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/7/897/ENUS219-487/index.html Planned availability for IBM MQ V9.1.4 is December 5, 2019 for Electronic software delivery. IBM MQ (aka WebSphere MQ) homepage https://www.ibm.com/products/mq Regards, Roger Lacroix Capitalware Inc.

Also posted in Fix Packs for MQ, IBM MQ, IBM MQ Appliance, Linux, Unix, Windows Comments Off on IBM MQ V9.1.4 Announced

AMQ7234 Question from the MQ ListServer

November 20, 2019 Roger Lacroix

Doug posted a question on MQ List Server regarding the MQ error message AMQ7234. His question was: My shop has always struggled with large number of messages just being left on the queue. Sometimes to be processed later, sometimes because the application does not know what to do with them, but they cannot be removed. […]

Also posted in C, HPE NonStop, IBM i (OS/400), IBM MQ, Linux, Programming, Unix Comments Off on AMQ7234 Question from the MQ ListServer

SQLite v3.30.0 Released

October 7, 2019 Roger Lacroix

D. Richard Hipp has just released SQLite v3.30.0. http://www.sqlite.org/news.html SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. The source code for SQLite is in the public domain. Regards, Roger Lacroix Capitalware Inc.

Also posted in C, Database, IBM i (OS/400), Linux, macOS (Mac OS X), Open Source, Programming, Unix, Windows Comments Off on SQLite v3.30.0 Released

JMS and Java Client Mode Performance Issues for MQ Get API Calls

August 15, 2019 Roger Lacroix

I’ve wasted far, far too much of my time inspecting what is going on with the auto-resizing of the get buffer for the internal JMQI and MQI components for MQ classes for JMS, MQ classes for Java and MQ classes for .NET. A strange entry in one of the MQ Auditor audit files got my […]

Also posted in IBM i (OS/400), IBM MQ, Java, JMS, Linux, macOS (Mac OS X), Programming, Unix, Windows Comments Off on JMS and Java Client Mode Performance Issues for MQ Get API Calls

Pub/Sub Java/JMS MQ MQGet API Issue

August 9, 2019 Roger Lacroix

Not surprisingly, when I tested: Subscribing to a topic with JMS Subscribing to a topic with Java (non-JMS) They both showed that the internal JMQI routine was starting with a MQGet buffer size of 4KB and auto-adjusting the size of the buffer as needed (all behind the scenes). Hence, when I used MQ Auditor, I […]

Also posted in IBM i (OS/400), IBM MQ, Java, JMS, Linux, macOS (Mac OS X), Programming, Unix, Windows Comments Off on Pub/Sub Java/JMS MQ MQGet API Issue

How to Improve Your Java/JMS MQ Tuning Cred.

August 8, 2019 Roger Lacroix

Here’s my version of a cheap Info-Commercial: Do you want to impress your colleagues? Do you want to impress your boss, so that you can receive a big fat bonus? Call today and we’ll show you how to impress the MQAdmins in your company! And if you call within the next 5 minutes, we’ll even […]

Also posted in IBM i (OS/400), IBM MQ, Java, JMS, Linux, macOS (Mac OS X), Programming, Unix, Windows Comments Off on How to Improve Your Java/JMS MQ Tuning Cred.

Tuning Java Programs for Optimum MQ Get API Calls Performance

August 6, 2019 Roger Lacroix

You should really read this blog posting first. The results of some of the test scenarios below, simply do not make any sense. I would like to think there is some sort of logic behind it but it is probably lack of testing by IBM that introduced some bugs in the code or should I […]

Also posted in IBM i (OS/400), IBM MQ, Java, Linux, macOS (Mac OS X), Programming, Unix, Windows Comments Off on Tuning Java Programs for Optimum MQ Get API Calls Performance