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Systems Center 3C4- Washington Systems Center Technical Bulletin MVS/SP Release 3 Installation Considerations Compiled and edited by the Washington Systems Center DAPS 0894 GG22-9250-00 July 1981 Washington Systems Center Gaithersburg» Maryland Technical Bulletin MVS/SP Release 3 Installation Considerations Compiled and Edited by the Washington Systems Center DAPS Code 0894 GG22-9250-G0 July 1981 The information contained in this document has not been submitted to any formal IBM test and is distributed on an "as is" basis without any warranty either express or implied. The ♦ use of this information or the implementation of any of these techniques is a customer responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. Mhile each item may have been reviewed by IBM for accuracy in a specific situation* there is no guarantee that the same or similar results will be obtained elsewhere. Customers attempting to adapt these techniques to their own environments do so at their own risk. Performance data contained in this document was determined in a controlled environment; and therefore* the results which may be obtained in other operating environments may vary significantly. Users of this document should verify the applicable data for their specific environment. In this document* any references made to an IBM program product are not intended to state or imply that only IBM's program product may be used* any functionally equivalent program may be used instead. It is possible that this material may contain reference to* or information about* IBM products (machines and programs)* programming* or services that are not announced in your country. Such references or information must not be construed to mean that IBM intends to announce such IBM products* programming* or services in your country. Publications are not stocked at the address given below* requests for IBM publications should be made to your IBM , representative or to the IBM branch office serving your locali ty. A form for reader's comments is provided at the back of this publication. If the form has been removed* comments may be addressed to; IBM Corporation* Nashington Systems Center* 18100 Frederick Pike* Gaithersburg* MD 20760* 2-2C-23 / Zone 5. IBM may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation whatever. You may* of course* continue to use the ^ ^ information you supply. ©Copyright International Business Machines Corporation 1981 ABSTRACT This Technical Bulletin is designed to aid in planning for the transition to MVS/SP Release 3. MVS/SP Release 3 includes all of the MVS/SP Release 2 features, plus additional enhancements. This book documents the MVS/SP Release 2 func tions as though they were new with Release 3. This document is not intended to be a complete reference on the features and functions of the MVS/SP Release 3 product; that detail is available in the standard product documents avail able with the product. This document identifies those features of the product of specific interest in a transition, and pre sents a suggested installation plan which can be tailored to an individual account. Appendix A contains the bibliography of the documents referred to in this bulletin. For a complete list of the publications (except technical bulletins) for MVS/SP Release 3, see the QS/VS2 MVS/Svstem Product General Information Manual, GC28-1025-4. There are actually two MVS/SP Release 3 products; 1. MVS/System Product - JES2 Release 3 (5740-XYS), and 2. MVS/System Product - JES3 Release 3 (5740-XYN). The primary difference between the two products is the subsys tem supplied (either JES2 or JES3). Unless otherwise indicated, the terms "MVS/System Product Release 3" and "MVS/SP Release 3" will be used to describe both products. Abstract i i i THIS PAGE INTENTIONALLY LEFT BLANK iv Installation Considerations PREFACE The following individuals were the major contributors to this MVS/System Product Release 3 Installation Considerations Tech nical Bulletin: Paul Dorn (WSC) Jerry Eubanks (WSC) ► Paul Glass (WSC) John Hutchinson (WSC) Dick Jorna (EMEA EDPG) • Brian Kasch (WSC) Larry Linn (WSC) Bill Mashburn (WFESC) Ron Saunders (WSC) Valuable information included in this document was also pro vided by the following individuals: Diana Bain (DSD» Poughkeepsie) Ronna Bibolet (DSD, Poughkeepsie) Rosemarie Burckhardt (FSC, Stuttgart) Bill Connors (A/FE SO Kevin Curley (IPO) —, Bernard Delvallee (DPMG) Dick Hajjar (WSC) Jim Hampel (Chicago AEC) Phyllis Harrison (A/FE SO Jim Hoffman (Chicago AEC) Stu Hoyt (DSO Guy Ki rby (WSC) Charles La Haie (GTD, Burlington) Jack Meyer (WSC) Hans Gsterod (EMEA EDPG) Dave Patterson (WSC) Jerry Sly (WSC) The information in this document is a collection of experiences derived from a number of sources, including the following: • MVS/SP Release 2 Early Support Program • Preliminary MVS/SP Release 3 Testing at the Washington System Center Preface THIS PAGE INTENTIONALLY LEFT BLANK vi Installation Considerations CONTENTS MVS/SP Release 3 Installation Considerations 1 BOP Installation Considerations • • 2 Subsystem Definition Facility 3 Message Processing Facility (MPF) ^ Display Units / Display Active (DUDA) 6 System Address Space Initialization (SASI) 10 VIO Enhancements ^2 Cross Memory Services Global Resource Serialization 16 CGMMTASK Enhancements 20 Page Fault Assist . ... 22 I/O Queu i ng i n Channels . • • • • • • • 24 Channel Selection Algorithm# BALANCE . 26 Suspend/Resume Hardware 27 Paging/Swapping Enhancements . 50 Virtual Fetch . 33 RAS Enhancements 55 Extended Real Storage • ^1 SRM Changes RMF Enhancements 49 JES2 Migration Considerations 51 General Considerations 51 User Modifications 55 ^ User Exits 57 3800 Enhancements Integrated in Product 64 Spool Migration 66 Mandatory Operational Changes 69 Optional Operational Changes 72 Summary of External Changes ... .. 78 JES3 Migration Considerations 85 Virtual Storage Constraint Relief 86 Early Volume Release 88 IBM 3380/3375 Device Support 89 IBM 3278/3279 Support 90 MVS Message Processing Facility and JES3 91 Spool RAS 95 Spool Partitioning 97 New User Exits 99 ^ Networking 181 Ti ps and Hints 182 JES3AUX Cross Memory Performance 184 Storage Requirements 187 Virtual Storage Requirements 187 Real Storage Requirements 11^ VM Considerations 115 Cross Memory Services Support 115 Extended Real Support 116 Sample Installation Plan 119 Contents v i i Installation Plan Overview 119 Installation Path Dependencies 119 Initial Assumptions 120 Installation Steps - Overview 120 Hardware Feature Requirements 12^ Base Control Program (BOP) Checklist 126 Pre-Install Activities 126 Install Activities . 127 Preproduction Testing - Operator Education . .. 128 Initial Production - Original JES 128 Subsequent Production - Original JES 128 * JES2 Checklist 129 Overview 129 Checkout old JES2 under MVS/SP Release 3 130 ' Install JES2 component of MVS/SP Release 3 130 Design* Code and Test User Modifications 132 JES2 System Test 132 Educate Operators on Required Function 133 Design and Test SPOOL Migration 13^ Cutover JES2 MVS/SP Release 3 into Production . 136 Education on New Functions and Facilities 137 JES3 Checklist 138 Planning and Education. 138 System Build and Modification . 139 Appendix A. Bibliography lAl viii Installation Considerations MVS/SP RELEASE 3 INSTALLATION CONSIDERATIONS This section identifies* by functional area* those features of MVS/SP Release 3 that should be considered during the installa tion. The following functional areas are discussed: 1. Base Control Program (BOP) 2. JES2 r 3. JES3 This section provides the background for evaluating the sug gested installation plan in the section "Sample Installation Plan" on page 119. "Appendix A. Bibliography" on page 141 of this document lists the documents referred to by this bulletin. For a complete list of the publications (except technical bulletins) for MVS/SP Release 3, see the QS/VS2 MVS/Svstem Product General Informa- t i on Manua1» GC28-1025-4. MVS/SP Release 3 Installation Considerations BCP INSTALLAflON CONSIDERATIONS This section discusses the installation considerations for each of the major new or changed functions of the Base Control Program (BCP) component of MVS/SP Release 3. The format for each topic is to give a general description of the function followed by those considerations that may impact the installa tion of MVS/SP Release 3. Installation Considerations Subsystem Definition Facility General: The Subsystem Definition Facility alloMs the installation to make subsystems known to MVS through a pre-established system parmli b member. Considerations: The Subsystem Definition Facility is optional and does not have to be utilized for any subsystems already defined in the sub system name table (lEFJSSNT)* or via the SYSGEN SCHEDULR macro. The following order is used during MASTER SCHEDULER processing to initialize subsystems: 1. SCHEDULR SYSGEN macro definitions 2. lEFJSSNT definitions 3. lEFSSNxx system parmlib definitions The or i marV subsystem definition must be in SYSGEN SCHEDULR macro* and is not allowed in either the lEFJSSNT or lEFSSNxx definitions. The elimination of the assembly/link-edit or superzap required to add new subsystems is the main advantage of this new facili ty. Also* the user can now specify a variable length parameter to be passed to the subsystem initialization routine. To initialize subsystems defined via this new facility* the user must specify the lEFSSNxx parmlib member(s)
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