Browse Prior Art Database

VM MPG Operating as a DRF Hypervisor as a First Level Guest Under PR/SM

IP.com Disclosure Number: IPCOM000115319D
Original Publication Date: 1995-Apr-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Gum, PH: AUTHOR [+6]

Abstract

As computing systems have been built larger and larger, it has become economically advantageous to consolidate many systems into one physical system. Logically Partitioned Mode (LPAR Mode) of the ES/9000* provides the means to consolidate these systems while remaining logically separate and distinct operating environments.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 85% of the total text.

VM MPG Operating as a DRF Hypervisor as a First Level Guest Under
PR/SM

      As computing systems have been built larger and larger, it has
become economically advantageous to consolidate many systems into one
physical system.  Logically Partitioned Mode (LPAR Mode) of the
ES/9000* provides the means to consolidate these systems while
remaining logically separate and distinct operating environments.

      This invention provides a means for a machine running in LPAR
Mode using EZF (extended-zone facility) to support the VM
Multiple-High-Performance Guests (VM MHPG) using Dedicated-Regions
Facility (DRF) to support its' second level guest.  This allows a VM
MHPGS system to be migrated to a logical partition in a machine
running in LPAR Mode thus reducing the need for migration of each VM
MHPGS environment to a multiple logical partition environment when
consolidating several systems.

      The function described to allow DRF to operate within an EZF
environment is called the DRF-nesting facility.  The DRF-nesting
facility provides a means for LPAR to support DRF use by an operating
system executing in a logical partition.  Two levels of SIE are
interpreted by the machine.

      The primary capability that this facility provides is the
ability to define DRF zones within an EZF zone.  The support of DRF
subzone definition is implemented for all I/O and processor functions
so that the DRF zone functions just as it does on a DRF machine.
LPAR detects and...