Yes, the article has some truly amazing fact™s. But CICS does have the ability to run a transactions in an isolated subtask.
________________________________________ From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Schmitt, Michael <michael.schm...@dxc.com> Sent: Tuesday, July 25, 2023 10:37 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: [EXT] Ars Technica: The IBM mainframe: How it runs and why it survives So CICS is no longer doing cooperative multitasking within each AOR, and thus requiring CICS versions of OS commands to prevent wait states from freezing the entire AOR? A CICS program can do direct GETMAINs, LOADS, abends, rather than use CICS commands? CICS no longer requires special versions of tools (e.g. debugger, abend dump management) and instead can use the same tools as batch programs? A CICS programmer no longer needs to learn a long list of CICS commands and EXEC CICS syntax? A CICS region no longer contains the storage from all of the transactions currently running and is now only one transaction in the region at a time? CICS transactions can no longer stomp on each other's memory? Great, I did not know that. IMS/TM uses the operating system for multitasking. There are no IMS/TM specific tools. An IMS/TM programmer only needs to know two commands, one to get a message and another to send it. IMS transaction abends look (almost) exactly like a batch abend. IMS programs have no restrictions on OS facilities. An IMS program can even do an STIMER (WAIT) without affecting any other transaction processing. Because, it uses the OS to do *preemptive* multitasking, like a modern operating system. -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Crawford Robert C (Contractor) Sent: Tuesday, July 25, 2023 8:14 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: [EXT] Ars Technica: The IBM mainframe: How it runs and why it survives Sorry, I worked in a shop that had both and I can tell you CICS is way more flexible, modern and performed better. I will give you this: IMS is a great piece of 90's technology. Robert Crawford Abstract Evolutions LLC (210) 913-3822 -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Schmitt, Michael Sent: Monday, July 24, 2023 11:43 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: [EXT] Ars Technica: The IBM mainframe: How it runs and why it survives Ars Technica published a deep-dive explainer of modern IBM mainframes: https://arstechnica.com/information-technology/2023/07/the-ibm-mainframe-how-it-runs-and-why-it-survives/ I’d quibble with the application server topic that talks about CICS with no mention of IMS/TM. CICS is to IMS as Windows 3.1 is to Windows 10. 😊 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
