On Jul 3, 2020, at 3:30 PM, Jackson, Rob <rwjack...@firsthorizon.com> wrote: > > I'm curious: what about adding zIIPs was challenging?
1. Determining what our zIIP and non-zIIP capacity needs would be. In other words, since we didn’t have zIIPs before we weren’t sure how much of our workload would actually run on the zIIPs. 2. The biggest thing was that we are an Adabas/Natural shop, so we were hoping to run both those products zIIP-enabled. However, we have a home-grown security system that’s implemented by several thousand lines of assembler code that runs as a part of the Natural session, and this code was doing things like issuing SVCs and examining the current TCB, and those things don’t work when you’re running zIIP-enabled. So the challenge was if we could rewrite all that code to work on zIIPs. (And see “how much of our workload could run zIIP-enabled” above.) We were able to get the code rewritten, and we’ve been very happily running Adabas and Natural zIIP-enabled ever since. -- Pew, Curtis G curtis....@austin.utexas.edu ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
