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(An aside: do terms like "mainframe" and "microcomputer" have any meaning any more, when a Raspberry Pi Zero has orders of magnitude greater RAM and power than
by cylinder714 8y ago
(An aside: do terms like "mainframe" and "microcomputer" have any meaning any more, when a Raspberry Pi Zero has orders of magnitude greater RAM and power than a '70s piece of "big iron"?)
- joshAg 8y agoYes. Mainframes still exist. IBM still sells them, and you can do things like hotswap CPUs and RAM or setup an geographically distributed HA cluster that can swap which mainframe the VMs or databases are "running" on without dropping connections, requests, or other interruptions. https://en.wikipedia.org/wiki/IBM_Z https://en.wikipedia.org/wiki/IBM_Z
- nineteen999 8y agoOne of the four large banks in my country I worked at only a few years ago still managed all their internal change management process on a fairly old IBM mainframe. You had to connect via an arcane telnet client (tn3270 protocol perhaps?) and input the change details. No fancy web forms. Perhaps it was a limitation of the application, but you couldn't mix uppercase and lowercase in the one form.