More About Resilience and Sysplex

Over the past 18 months, we’ve been working on a project with our partners, CPT Global. This project has been converting applications to sysplex: active-active configurations that provide high availability. In the previous issue, we started to look at the project and VSAM RLS issues.

We continue in this issue with three technical articles that cover more about this project, and our user experiences with it.

In our first article, we talk about about getting more resilience from our CICSPlex, rather than simply resilience for our CICS programs and transactions. With some small changes, other processing can benefit from our new sysplex.

In our second article, we finish up our discussion of VSAM RLS, and the issues we found with it. This final article talks about some of the surprises we found when converting VSAM files to RLS.

In our final article, we move to IBM MQ. In particular, we look at in-order processing, and issues we found when implementing an MQ queue sharing group to work with our CICSPlex.

Before COVID-19 hit, we were lucky enough to present at Share in Fort Worth. This presentation was also about our user experiences with sysplex: this time talking about implementing a CICSPlex, and the issues we found.

You can find a copy of our presentation here.

We hope you enjoy this issue.