4 ms·

Sounds like IMS runs on Z system mainframes with redundant hot-swappable CPUs and memory. They pay IBM a lot of money for the illusion of a single reliable mach

Sounds like IMS runs on Z system mainframes with redundant hot-swappable CPUs and memory. They pay IBM a lot of money for the illusion of a single reliable machine, when a different OS would manage it as a small cluster. We economize by using racks of cheap, flaky commodity hardware, but we have to be ready for one computer to die by failing each application over to another.

kragen 4y ago
in 01973 the s/360 did not have hot-swappable cpus or memory even in the 01990s i don't think ibm had such an offering, though tandem did (but it couldn't run ims)
- jpgvm 4y ago
  it didn't run ims but it ran nonstop SQL instead which was a rdbms designed for their redundant hw architecture
  - kragen 4y ago
    right, i didn't mean to imply it didn't support acid