>>We are a CICS shop with IMS DB (DBCTL), but I've been curious for a while >>about the differences between how CICS works >>and how IMS TM works. I >>couldn't find anything on the web. Anyone have a link to a good reference?
Try Google for "IMS DC". The IMS Transaction Manager used to be called IMS/DC (for Data Communication). It has been a long time since I touched it, but my recollection is that it was a cleaner implementation within the Operating System. It used CALL level API's (no EXEC IMS precompiler) and exploited all the OS capabilities for multitasking and multiprocessing. CICS on the other hand tried to isolate apps from the OS, becoming its own mini-OS within a single OS address space. This was an advantage for CICS back in the 70's. But I suspect the table has turned under z/OS. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
