ATM's (and other IOT's like cash register subsystems, etc.) aren't "logged on" per se, AFAIK. I believe that those are transactional accesses, one to check user PIN/Password/authorization of the card, another for each money withdrawal/deposit/transfer/etc. I don't believe they are actively accessing the mainframe the whole time you are using them, only when you perform an action and then only for that one transaction.
I think you wouldn't count those as "logged on", as opposed to the human insurance agents who may well be actively logged on from their office researching plans for a client or even possibly from a mobile device at a claim investigation site. Peter From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Bob Bridges Sent: Monday, August 14, 2023 10:55 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: z/OS users If we're limiting the count to on-line in-house users - I'm talking about TSO, CICS etc - I suspect State Farm might have a thousand users logged on at a time (that's a massive system) but a few hundred is more usual in the companies I've worked ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message came from outside your organization. ZjQcmQRYFpfptBannerEnd If we're limiting the count to on-line in-house users - I'm talking about TSO, CICS etc - I suspect State Farm might have a thousand users logged on at a time (that's a massive system) but a few hundred is more usual in the companies I've worked for. Currently I have an insurance company as my main client; in-house there are about 220 managers who review access, with let's guess an average of five mainframe reports each. They also have about 400 independent agents that use a system that ultimately connects them to the mainframe, and each of those may have one or two assistants with their own IDs. That's probably typical for an insurance company. I couldn't guess about how many might be logged on at once. Oh, sure I could, but it's just a guess: If there are 2000 mainframe IDs, maybe 500 at a time? Purest guess. But we've also been talking about banks and their ATMs. Do we count ATM customers in the number for Bank of America, with their branches around the country? That could run to thousands at one time, don't you think? --- Bob Bridges, robhbrid...@gmail.com<mailto:robhbrid...@gmail.com>, cell 336 382-7313 /* It is often stated that of all the theories proposed in this century, the silliest is quantum theory. In fact, some say that the only thing that quantum theory has going for it is that it is unquestionably correct. -from "Hyperspace" by Michio Kaku */ -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU<mailto:IBM-MAIN@LISTSERV.UA.EDU>> On Behalf Of Phil Smith III Sent: Monday, August 14, 2023 10:14 In another thread, Jon Perryman wrote, in part: >[You're] on a multi-million dollar computer shared by thousands. Pure curiosity here: Without getting into any theology about futures, or that obviously a single, relatively small app or even database could be used in some sense by thousands of users via the network: How many users do sites typically have these days? In 1986, University of Waterloo had over 20,000 VM users (on four 4341s running Adesse Single-System Image), which was considered well beyond the pale by most. We had several thousand logged on at once. Now, that was VM (VM/SP, to be precise). How many users does your z/OS shop have defined, and what's your daily high-water mark of logons? We're a tiny dev shop, so have a grand total of about four humans who touch z/OS using keyboards, and one of them only does USS stuff. That's presumably not typical; I mention it just in the spirit of fair play. Again, this is purely curiosity-I am not contending that it proves anything (except what we already know, which is that thanks to networking, there are a lot of users and uses that show no visible signs of touching the mainframe, yet are 100% dependent on it). -- This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
