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тАО01-09-2008 10:43 AM
тАО01-09-2008 10:43 AM
We have a DS20 which is used for an application which consists of a few hundred COBOL executables and several hundred data files. The first versions of this application were written between and 1986 and they ran on a MicroVax. The application assumes all users will be on terminals and be logged out when they exit the application. We don't use it that way anymore. All users, by convention I assume, were put in UIC group 300. And I've just been continuing in that convention - not wanting to break anything.
Now my question.
I noticed from help in UAF "Digital reserves group 1 and groups 300-377 for its own use."
Why is that?
I want to put some groups of users in different UIC groups now, and I'd be more comfortable doing that if I knew whether or not I was already violating some important restriction - or relying on some property of a "reserved" group.
The OVMS version on our production server is Version V7.1-2
(Btw, we have two new rx2660's w/ 8.3 on order. I'm very excited!)
Solved! Go to Solution.
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тАО01-09-2008 10:57 AM
тАО01-09-2008 10:57 AM
Re: What are UIC Groups 300-377 Reserved For?
I cant say that this is absolutely gospel, but here is my theory based on an empirical examination of my own UAF file.
Looking at all accounts between Group 300 and 377 I see,
Apache
PCFS
MSAF
MSAP
Pathworks
RDMS
SQLSRV
DECEvent
DECNet
PMDF
Note: No user accounts, all are either layered products or 3rd party products. Based on this I would conclude that these are reserved so that 3rd Party and Layered products can be installed using a hard-coded UIC Group number, without risking a conflict.
Just my 2c's worth.
Dave.
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тАО01-09-2008 11:01 AM
тАО01-09-2008 11:01 AM
Re: What are UIC Groups 300-377 Reserved For?
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тАО01-09-2008 11:18 AM
тАО01-09-2008 11:18 AM
Solutionto begin with:
WELCOME to the VMS forum!
Yes, group 1 is defenitely dedicated to VMS itself.
(and I always consider all UIC groups beow )SYSGENs) MAXSYSGROUP as such).
Groups 300 - 377 are the default UIC groups for several layered an d 3rd-party products.
And in this rather loose description also lies its freedom.
AFAIK, installing a product with an associated username probes if its default group is still unoccupied, and only then uses it.
Many (all?) also offer the installer to NOT accept that value.
In short, VMS tries to prevent collisions.
Really, the only danger I am am aware of, is a system manager that assigns new users to groups that already hold such "function-bound" account(s).
And yes, I have had the "pleasure" to disentangle one such mess. :-(
Better just play safe: There are enough groups available so that you can easily honor those reservings.
hth
Proost.
Have one on me.
jpe
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тАО01-09-2008 11:27 AM
тАО01-09-2008 11:27 AM
Re: What are UIC Groups 300-377 Reserved For?
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тАО01-09-2008 11:29 AM
тАО01-09-2008 11:29 AM