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Date:      Mon, 10 Aug 1998 08:32:41 +0930
From:      Greg Lehey <grog@lemis.com>
To:        Das Devaraj <das@netcom.com>
Cc:        djv@bedford.net, Brandon Lockhart <brandon@engulf.net>, freebsd-chat@FreeBSD.ORG
Subject:   Re: FreeBSD
Message-ID:  <19980810083241.L11095@freebie.lemis.com>
In-Reply-To: <Pine.3.89.9808091311.A6903-0100000@netcom3>; from Das Devaraj on Sun, Aug 09, 1998 at 01:51:57PM -0700
References:  <19980809104012.P14475@freebie.lemis.com> <Pine.3.89.9808091311.A6903-0100000@netcom3>

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On Sunday,  9 August 1998 at 13:51:57 -0700, Das Devaraj wrote:
>
>> On Saturday,  8 August 1998 at  7:12:01 -0400, CyberPeasant wrote:
>>> The IBM mainframe OS, MVS, will run several OS's on
>>> the same machine, simultaneously. Each user gets his own OS.
>
> Actually this is partially true.  Any processor complex can be
> split into logical partions (LPAR) using PR/SM (Processor Resource/
> Systems manager) and different OS' loaded onto them.  These partions
> operate independently, except when they share the IO devices.  Each
> user getting his/her OS is a stretch, since max is something like 10.

Oh, sure, when you have multiple CPUs.  I think we were talking about
software multiplexing a physical system.

> On Sun, 9 Aug 1998, Greg Lehey wrote:
>> Nowadays the operating system is called OS/390, also known as UNIX 95.
>
> The traditional OS is still MVS with a lot of qualifications after
> it like MVS/ESA etc (actually they seem to use that and OS/390
> interchangeably).

I base my statement on some information I got from an IBM droid a
while back who wanted me to hold a lecture for them.  I used the term
"MVS", and he said "no, that's called OS/390 nowadays".

> Then there is OpenEdition MVS, which is UNIX 95 compliant.

Could be, but this was the version he was talking about.

Greg
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