18 Nov
2019
18 Nov
'19
1:23 p.m.
On 11/18/19 11:10 AM, Paul Koning wrote:
Open systems may be distributed, distributed systems
may be open, but
they are not synonyms.
Okay. Fair enough.
I don't think the people using "Open Systems" as in Mainframe vs Open
Systems vs Wintel were differentiating between "open" vs
"distributed".
For example, I'm not sure anyone would call VMS an
open system, yet
clearly it's distributed (VAXcluster).
What is "open" in this context? Is it open source? Is it open
communications protocols? (As in OSI / POSIX.) Is it something else?
I suspect that OpenVMS qualifies as the OSI / POSIX meaning of "open".
;-) But OpenVMS is decidedly not open source.
OpenMVS (a.k.a. USS) on the mainframe comes to mind too. }:)
--
Grant. . . .
unix || die