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Browse Prior Art Database

Dynamic Alteration of Subsystem Operation via Dynamic System Parameters

IP.com Disclosure Number: IPCOM000118344D
Original Publication Date: 1996-Dec-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Duval, ME: AUTHOR [+3]

Abstract

Disclosed is a method to provide the ability for a computer installation to dynamically modify the subsystem parameters by allowing them to switch from the original data set concatenation containing the system/subsystem initialization parameters to another data set concatenation containing another set of system/subsystem initialization parameters. This method can be achieved by issuing a new system operator command that will dynamically change a parmlib concatenation without having to initiate an Initial Program Load (IPL) or system boot.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Dynamic Alteration of Subsystem Operation via Dynamic System Parameters

      Disclosed is a method to provide the ability for a computer
installation to dynamically modify the subsystem parameters by
allowing them to switch from the original data set concatenation
containing the system/subsystem initialization parameters to another
data set concatenation containing another set of system/subsystem
initialization parameters.  This method can be achieved by issuing a
new system operator command that will dynamically change a parmlib
concatenation without having to initiate an Initial Program Load
(IPL) or system boot.

      In today's MVS/ESA* environment, installations are required to
use one set of initialization parameters for the life of an IPL.
These include parameters for both system initialization and subsystem
initialization.  Since systems have become quite stable, the life of
the IPL may be lengthy (weeks, months or even years).  Installations
are "locked in" to the IPL parameters.  However, it is possible (even
likely) that an installation will want to dynamically add subsystems
and/or dynamically modify the subsystem parameters during the life of
the IPL.  Support exists to allow dynamic add of subsystems but not
to allow the dynamic modification of the subsystem parameters
specified at IPL.

      Additionally, with the advent of Concatenated Parmlib Support
it is possible an installation could corrupt one of the data sets
within the logical parmlib such that...