Sujet : Re: Inside an IBM z17
De : ldo (at) *nospam* nz.invalid (Lawrence D'Oliveiro)
Groupes : comp.miscDate : 04. May 2025, 22:27:59
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vv8m4u$2qpl1$3@dont-email.me>
References : 1 2 3 4 5
User-Agent : Pan/0.162 (Pokrosvk)
On Sun, 4 May 2025 10:22:51 -0400 (EDT), Scott Dorsey wrote:
Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
>
But they do still suffer the latencies from a platform optimized for
batch rather than interactive operation, don’t they.
No, this isn't 1965 any longer. These are realtime transaction
processing systems.
No, they are *batch* transaction processing systems. They have file
formats that still emulate the layout of punch cards.
You _can_ run batch stuff on VM/CMS too ...
Remember what the “VM” part was for: it was a kludge because CMS wasn’t a
proper multiuser OS. So to work around that, each user was given their own
entire virtual machine.
The ability to manage I/O load dynamically is a big deal.
Not on a modern OS like Linux, that just takes it all in its stride.
Re: Inside an IBM z17
Re: Inside an IBM z17