Re:IBM introduces z15 mainframe
by tyingq on Sunday September 15, 2019 @09:38AM
(#20977139)
"Citation needed, especially on that implication that x86-64 lacks reliability."
Basically, the hardware and software on a mainframe does it for you. Versus having to implement redundancy and resilience into your app. You can pull a CPU on a running mainframe, and it keeps chugging. Batch failures, app failures, etc, have a very well defined ecosystem for recovery that's consistent across apps.
As you imply, though, provided you pick the right software, there's not much difference in reliability these days. The variety of software choices is what kills reliability on x86/Linux. Too little established experience because there's too many choices.
Basically, the hardware and software on a mainframe does it for you. Versus having to implement redundancy and resilience into your app. You can pull a CPU on a running mainframe, and it keeps chugging. Batch failures, app failures, etc, have a very well defined ecosystem for recovery that's consistent across apps.
As you imply, though, provided you pick the right software, there's not much difference in reliability these days. The variety of software choices is what kills reliability on x86/Linux. Too little established experience because there's too many choices.