One of the topics during a recent presentation on 'IBM MQ and configuring for High Availability' covered the theory on improving availability for IBM MQ clients' connectivity using a Client-Channel Definition Table (CCDT). This capability enables a client application to connect to any one of a set of running queue managers (QMs), to improve availability.

I thought ... How difficult can this be? It'd be great to include this in a demo!

The article I created highlights the steps I went through to turn theory into practice, and the learning required to achieve connectivity from my IBM MQ client application to a local IBM MQ QM, an IBM MQ on Cloud QM in London, and an IBM MQ on Cloud QM in US-South (Dallas). In summary, the areas covered in the article, to setup for CCDT usage, are:

• Defining a CCDT JSON file
• Coding options in JMS for CCDT usage
• Configuring the mqccred channel exit