VMS versus UNIX

[Jan van den Ende]

Wim,


Also : DEC did bad marketing 15 years ago.


Make that: DEC (and follow-ons) dir that for the _DURATION_ of (at least) 15 years,
and I fully agree!

Proost.

Have one on me.

jpe

[Wim Van den Wyngaert]

Also : Unix is a lot faster (cache, dirty IO's, RMS slowdown, file extention slowdown, working set extention slowdown, ...).

Wim

[Daniel Fernandez Illan]

Win

Unix is a lot faster

25 years ago I worked with a OS specific to Real Time applications (MPX-32). Yes it was a very fast OS, but controls over operations were very bad, if you defined in FORTRAN 77 an array IEX(3) and index had a non valid value (index=-32767) when you intended assign value of array IEX(-32767) then system crashed.
Yes, very faster but very bad mistakes or errors control.
Saludos.
Daniel

[Ian Miller.]

"Unix sources can be exchanged over Unix platforms without big changes."
Only if carefully written otherwise porting from one version of unix to another version of unix can be a lot of work.

The mistaken attitude is that unix is not propritary. Most unixes belong to somebody and they are all different but have the same flaws.
You get a system running on one unix flavour and theoretically you can move it but in practice its a lot of work.

I guess the answer is market perception - where are VMS Marketing? VMS is complient with more standards than a lot of unixes (posix etc) but nobody notices.

[Jan van den Ende]

Ian.


.. but have the same flaws ..


If THAT were true, things would be easy in *UX land!
No, they all have DIFFERENT flaws (only mostly the same TYPE of flaws), so you have to adapt separately to each different one.

Proost.

Have one on me.

jpe

[Willem Grooters]

Wim,


Add these causes:
No checks on privilege, protection, security, buffer/stack/data area overflow, invalid concurrency (locks), OS/system health oin evry level. No real error control.

(well, some may have improved but in my yougre days these were certainly true)

Willem