Mainframe, Performance, Topics Podcast

Episode 35 "In search of EXCELence?"

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What’s New

  • z/OS dependencies moved from Semeru 11 to 17 before November 2025
  • Manual of the Moment: MVS Extended Addressability Guide for learning about address spaces, data spaces, and hiperspaces.

    • Mainframe - Looking at ages of fixes you haven't installed yet

    • IBM has started adding a REWORK date to PTFs. The date may be a day or two before the actual availability date.
      • Use case example: requirement with a policy that Security/Integrity (SECINT) PTFs that meet some criteria must be installed within xx days of availability.
      • Fits nicely with the z/OS UUID support, from Episode 34.

        • Performance - Drawers, Of Course

        • Martin explores the IBM z16 drawers, frames, and cache hierarchy.
        • All of an LPAR’s logical processors and memory should be in the same drawer.
        • Important because cross-drawer memory and cache accesses are expensive.

          • Topics - Excel Love It Or Hate It

          • Martin and Marna discuss how they use Excel, and what they like and dislike about it.
          • Graphing and customization difficulties were investigated.

            • On the blog

            • Marna's blog
            • Martin's blogs

              • So It Goes...

              ...more
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              Mainframe, Performance, Topics PodcastBy Marna Walle