Where and when was "user" ever defined? IBM uses (no pun intended) that word
to describe who can use (pun intended) the CVTUSER field in the Communications
Vector Table ("a word available to the user"), and the general consensus is
that in this sense "user" means the IBM customer who is paying for the
mainframe system and not any one of the possibly several thousand people who
are "sub-using" the system that the "user" is renting/leasing from IBM, who
would apparently be the "owner" of the whole system and thus possibly the
"owner" of all data sets created by "sub-users".
Bill Fairchild
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of
Paul Gilmartin
Sent: Monday, January 16, 2012 12:21 PM
To: [email protected]
Subject: Re: How can I know the owner of a PDS?
On Mon, 16 Jan 2012 16:36:54 +0000, Eric Bielefeld wrote:
>This may not be multi-user, but I know the when I was a computer operator back
>in 1969, DOS on a 360 mod 40 could be run with 3 partitions - BG, F1, and F2.
>We didn't run any online systems, but you could run up to 3 jobs at a time.
>
Indeed. I regard that as multiprocessing, but not multi-user, even as on z/OS
UNIX I can do
for I in 15 10 5; do sleep $I & done
... four processes but only one user.
I suppose the earliest accommodation of multiple users by OS/360 was the
accounting fields on the JOB statement (was this aboriginal?), needed for
chargeback accounting. There was a similar perceived need for DASD space
accounting which would have most reasonably been satisfied by copying the JOB
accounting info by default into the DSCB. Never happened. Programmers are
still being advised to scour the SMF data to retrieve the information.
I recall one site in the late 1970s which performed DASD accounting by
requiring users to submit a paper form to create a data set, supplying DSN and
SPACE. Undocumented data sets were periodically scratched.
-- gil
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