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Conference star::wizards

Title:	"ASK THE WIZARDS"

Moderator:	QUARK::LIONEL

Created:	Mon Oct 30 1995
Last Modified:	Mon May 12 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1857
Total number of notes:	3728

1576.0. "Open: general VMS questions" by STAR::JKEENAN () Tue Feb 11 1997 08:53

Date: Thu, 23 Jan 1997 04:33:58 -0500
Message-Id: <[email protected]>
From: "VMS001::WWW"@vms001.das-x.dec.com (23-Jan-1997 0434)
To: [email protected], [email protected], [email protected]
Subject: Ask the Wizard: '[email protected]'

Remote Host: sorrel.hensa.ac.uk
Browser Type: Mozilla/2.01 (Win95; I)
Remote Info: <null>
Name: Barry Yacomine
Email Address: [email protected]
CPU Architecture: VAX and Alpha
Version: v 6.2
Questions: 

a few actually.

What kind of shceduling does VMS use ?
What sort of file, disk and memory management does it have ?
How does it deal with multi-user programing ?

T.R Title User Personal
Name Date Lines

1576.1 See Existing Documentation XDELTA::HOFFMAN Steve, OpenVMS Engineering Tue Feb 11 1997 15:10 29

T.R	Title	User	Personal Name	Date	Lines
1576.1	See Existing Documentation	XDELTA::HOFFMAN	Steve, OpenVMS Engineering	`Tue Feb 11 1997 15:10`	29
	Writing a research paper on OpenVMS, I see. :What kind of shceduling does VMS use ? There are two scheduling schemes used for user processes, a pre-emptive scheme used for the real-time processes -- for the processes with priorities of 16 and above, and a round-robin non-real-time scheme -- for the timesharing processes with priorities of 15 and below. Support for a user-written class schedulers -- see the example in recent OpenVMS versions sys$examples:class.c -- is available. :What sort of file, disk and memory management does it have ? It has good management. :How does it deal with multi-user programing ? Very carefully. For general questions, see the OpenVMS User's Guide, and the OpenVMS Programming Concepts manual. For the details on the internal operations, see the _OpenVMS Internals and Data Structures Manual_, and the _VMS File System Internals manual_. The former two are in the documentation set. The latter two are available from Digital Press.

   Writing a research paper on OpenVMS, I see.

:What kind of shceduling does VMS use ?

   There are two scheduling schemes used for user processes, a
   pre-emptive scheme used for the real-time processes -- for
   the processes with priorities of 16 and above, and a round-robin
   non-real-time scheme -- for the timesharing processes with
   priorities of 15 and below.

   Support for a user-written class schedulers -- see the example
   in recent OpenVMS versions sys$examples:class.c -- is available.
   
:What sort of file, disk and memory management does it have ?

   It has good management.

:How does it deal with multi-user programing ?

   Very carefully.

   For general questions, see the OpenVMS User's Guide, and the
   OpenVMS Programming Concepts manual.  For the details on the
   internal operations, see the _OpenVMS Internals and Data
   Structures Manual_, and the _VMS File System Internals manual_.
   The former two are in the documentation set.  The latter two
   are available from Digital Press.