Re: Alpha remembrance day


That's called single-level storage, and IBM has spent decades making it
work reasonably well in its i-series platforms. But it's worth noting
that they've never attempted to expand its use to their other offerings:
it's definitely not for everyone (and arguably not even for i-series, but
with a significant piece of their existing customer base so heavily
invested in it it's hard to back away from now).



Having spent a good ten years of my life supporting the AS/400s (almost from
the beginning of that branding until some years ago), I would say that
there is something very elegant about single-level storage. It fits very
nicely with memory mapped IO, which we see in all sorts of operating
systems - including (wonder of wonders) openvms...

It also made it very simple to add dasd (as IBM always liked to call it) -
again I think simpler than on openvms.

Don't get me wrong - those two systems OS/400 & VMS are my favorites. I
prefer the OS400 - everything is an object within a database concept and the
extensive job and system logging that is available for commercial
applications (if they are done right). The tight coupling between the OS &
the db is really nice.

I prefer VMS for technically orientated applications.... (but then that's
all I ever used it for)...

Villy


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