On Tue, 11 May 2021 03:25:35 -0700, Ed Jaffe <edja...@phoenixsoftware.com> wrote: >We experienced significant clock drift on our z13s. (I can't understand >why IBM makes STP optional and pricey. All Z machines should be able to >synchronize to NIST.)
Ed, I won't argue the point of "Why isn't in a standard feature?" (I wish it was, too), but I will take issue with "pricey". I was surprised at how inexpensive it actually is, particularly when I look at what it does. >Our z15 has gone through a full POR several times since being installed >in August 2020 (see the video https://youtu.be/uis-8s_O1K8), the most >recent one being just a few weeks ago. So, it's difficult to know yet if >similar adjustments will be required. If they are, we stand ready to >adjust our CLOCKxx member as needed. I think you'll find the z15 has a more stable clock. But you need to back up and look at your business requirements. FINRA, for example, requires business systems to be within one second of UTC. (Certain kinds of financial transactions have much tighter requirements.) Given the time and effort you spent on fiddling with CLOCKxx, you may find that STP pays for itself very quickly. Alan Altmark IBM ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
