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Moving messages between IBM MQ for z/OS queue managers in a sysplex

tonySharkey Visits (2346)

When looking at moving messages between MQ queue managers in a sysplex, there are a number of options for configuration. Recent innovations in the TCP stack such as SMC-R and SMC-D have led us to revisit whether shared queues can still be regarded as the "gold standard". In summary, this blog will show that for small messages, shared queue still achieves the best throughput rate but as message size grows and/or workload increases, alternative configurations may be more optimal. A bit more detail: There are a number of different... [More]

Tags: moving messages smc-r smc-d mq8

Do you use channel exits written in C on your z/OS queue manager?

tonySharkey Comments (4) Visits (3162)

There are multiple types of channel exits supported by MQ, namely SENDEXIT, RCVEXIT, SCYEXIT and MSGEXITs. It is possible to have one or more of each of these associated with any particular channel, except MSGEXIT for either SVRCONN or CLNTCONN-type channels. When a channel exit written in C is invoked, the Language Environment needs to be built. One of the first events to take place is that z/OS loads the C runtime event handler module CEEEV003. Depending on where this module is loaded from can make a significant difference to the time spent... [More]

Tags: z/os mq8 exit pi58641 mq channel

Tuning IMS MPRs that connect to an MQ queue manager

tonySharkey Visits (2669)

Ensuring the pre-load list for the IMS adapter is up to date can make a significant difference to the performance of an IMS Message Processing Region that makes use of IBM MQ verbs such as MQPUT. The list of modules in the pre-load list has recently changed to include CSQBAPPL , such that the list is now: CSQACLST CSQAMLST CSQAPRH CSQAVICM CSQFSALM CSQQDEFV CSQQCONN CSQQDISC CSQQTERM CSQQINIT CSQQBACK CSQQCMMT CSQQESMT CSQQPREP CSQQTTHD CSQQWAIT CSQQNORM CSQQSSOF CSQQSSON CSQFSTAB CSQQRESV CSQQSNOP CSQQCMND CSQQCVER CSQQTMID CSQQTRGI... [More]

Tags: ims mq7.1 mq8

How to setup IBM MQ Multi instance queue manager with Microsoft Azure File Service

Shashikanth.Rao Comments (6) Visits (4232)

Here is a GitHub wiki that describes steps for setting up IBM MQ Multi-instance queue manager with Microsoft Azure File Service shared file system. Read on: https://github.com/ibm-messaging/mq-azure/wiki/How-to-setup-IBM-MQ-Multi-instance-queue-manager-with-Microsoft-Azure-File-Service

Tags: mq8 miqm

Enabling the CAPEXPRY feature on IBM MQ for z/OS

Mark_P_Wilson Visits (3328)

In my last blog ( How CAPEXPRY in IBM MQ can improve your social life? ) I introduced the CAPEXPRY feature that was shipped with MQ 8.0.0.4 and delivered in APAR PI50761 on z/OS. Now the APAR is now available and this blog will describe how to enable the new function once the APAR is applied to your system. MQ have provided a switch that enables the CAPEXPRY function at the queue manager wide level. To enable CAPEXPRY to be used on a queue manager the MQSC command RECOVER QMGR(TUNE CAPEXPRY ON)... [More]

Tags: mqzos ibmmq mq8

Limiting CPU consumption in compatibility mode during MQ V8 migration

tonySharkey Comment (1) Visits (3865)

Limiting CPU consumption in compatibility mode during V8 migration IBM MQ for z/OS version 8.0.0 brings some new functions which can improve the performance of your interactions with the queue manager, including 64-bit buffer pools. Performance report MP1J discusses the benefits of 64-bit buffer pools, however this facility is not available when first migrating your queue manager to version 8.0.0 and default value OPMODE=(COMPAT,800) is used. Additionally version 8.0.0 brought an update to the Deferred Write Process (DWP) and this change... [More]

Tags: opmode compat dwp mq8 migration performance

Verifying your Queue Managers SSL Configuration with MQCERTCK.

RobParker Comment (1) Visits (4857)

Introduction MQCERTCK is the updated version of the MH03 SupportPac that is now included in MQ as of version 8.0.0.4. MQCERTCK is a tool to look for common mistakes in your Queue Manager’s SSL configuration and provides recommendations for resolving problems. It will check: Existence and permissions of Queue Manager’s Key Repository referenced in the Queue Manager SSLKEYR attribute Existence and validity of Queue Manager’s certificate referenced in the Queue Manager CERTLABL attribute. Existence and validity of any... [More]

Tags: tls mq ssl mqcertck mq8

MQ in Docker is now supported for production use

Arthur Barr Comments (2) Visits (13242)

Further to the earlier technology preview , running MQ queue managers inside Docker containers is now supported for production use. Check out this short demo video . Why is this useful? Docker allows you to "package an application with all of its dependencies into a standardized unit for software development" (see " What is Docker? "). This gives you a predictable environment for running your application, which in turn leads to reliable deployments. There can be major benefits to your continuous... [More]

Tags: docker cloud mq8

How CAPEXPRY in IBM MQ can improve your social life?

Mark_P_Wilson Visits (4969)

Imagine the scenario where Peter, a IBM MQ administrator is enjoying a party on a Saturday night when his mobile rings. He is on call out duty and there is a outage so he has to leave the party and go into the office. When Peter gets there he finds that the problem is due to a queue having thousands of messages sitting on it and there has been a knock on effect on other queues and systems. Peter starts to dig deeper and finds that these messages should be serviced by an application which is on a client machine but the machine has been... [More]

Tags: mqappliance mqzos mq8

Bitesize Blogging: MQ 8.0.0.4 Events and MQI Formatting

Mark E Taylor Visits (3762)

Another in the series of bitesize blog posts about features in MQ V8. Check out the whole series here . This article is going to talk about some new code shipped with the V8.0.0.4 FixPack to make it easier to see what a queue manager is doing, simplify investigation of possible problems, and to assist with writing your own MQ applications. To start with, we need to talk a little about MQ’s event generation. Command and configuration events One of the mechanisms used to monitor what is going on in MQ is to look at events that the queue... [More]

Tags: mq pcf bitesize mqseries mq8 fixpack

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