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  Systems GC20-1752-0 OS Virtual Storage 1 Features Supplement This supplement discusses OS/Virtual Storage 1 (OS/VS1) features and organization. Only concepts and functions of OS/VS1 that are new to and significantly different from those of S MFT are presented in detail. Transition from S MFT to OS/VS1 is discussed also. Facilities announced prior to the date of this supplement are included in the discussions. Features th t are not part of the first release of OS VSl are identified. This supplement is an optional section that is designed to be inserted in its entirety in nyone of the following base publications, each of which contains the conceptual and System/370 hardware information required to understand . the OS/VSl discussion presented: ã A Guide to the iBM'System/370 Model 135 (GC20-1738) ã A Guide to the i M System/370 Model 145 (GC20-1734) ã A Guide to the iEII System/370 ]w.odeI158 (GC20-1754) ã A Guide to the i M System/370Model168 (GC20-1755) Readers who possess more than one of the above base publications need add this module to only one of the documents as the OS/VS1 information presented applies to System/370 Models 135, 145, 158, and 168 unless otherwise indicated in the text. The contents of this supplement are designed to acquaint the S MFT knowledgeable reader with the new facilities and the advantages of OS/VSl.  PREFACE This supplement is stocked in the I M Distribution Center, Mechanicsburg as a separate form-numbered item and is not automatically distributed as part of any other publication. Subsequent updates to the supplement must also be ordered separately. Those who are familiar with a System/370 model and OS MFT, and who require information about OS/VS1, should obtain this supplement and insert it as Section 90 of one of the appropriate base publications listed below. Base publications for the OS/vs1 supplement are: ã A Guide to the I M System/3?O Model 135 (GC20-1738-4 or later editions ã A Guide to the I M System/3?O Model 145 GC20-1~34-2 or later editions ã A Guide to the I M System/3?O Model 158 GC20-1~54) ã A Guide to the I M System/3?O Model 168 (GC20-1755) This supplement is self-contained. t begins with page 1 and includes its own table of contents and index. The title of the supplement is printed at the bottom of each page as a means of identifying the optional supplement to which the page belongs. Knowledge of information contained in other optional supplements that can be added to the base publications listed above is-not required in order to understand the OS/VS1 features as they are presente1. However, comprehension of virtual storage concepts and dynamic address translation hardware and terminology, as described in anyone of the base publications, is assumed. First Edition August 1972) This publication is intended for planning purposes only. t will be updated from time to time; however, the reader should remember that the authoritative sources of system information are the system library publications for OS/VSl. These publications will first reflect any changes. Requests for copies of I M publications should be made to your I M representative or to the I M branch office serving your locality. Address comments concerning the contents of this publication to: I M Corporation, Technical Publications Department, 1133 Westchester Avenue, White Plains, New York 10604. © Copyright International Business Machines Corporation 1972  CONTENTS Section 90 Section 90: as/Virtual Storage 1 Features 90:05 Functions and Features Supported ã ã 1 ã ã 90:10 Organization and Initialization of Storage Virtual Storage Organization ã ã ã ã 6 Real Storage Organization. ã ã ã ã ã External Page Storage Organization ã System Initialization. ã ã ã ã ã 90:15 Major Components. ã 90:20 Job Management Master Scheduler and Communications Task ã ã ã ã ã 6 ã 12 ã 12 13 ã 16 ã 18 ã 19 ã 20 ob Entry subsystem. Job Queue Management ã ã Job Scheduler ã ã ã ã ã 8 Remote Entry Services.. Conversational Remote Job Entry. ã ã ã ã ã 90:25 Task Management Interruption Supervisor. ã ã Task Supervisor. ã ã ã ã ã ã Virtual Storage Supervisor ã Program Fetch. ã ã ã ã ã 90:30 Data Management Input/Output Supervisor Virtual Storage Access Method. ã 90:35 Page Management General Functions. ã ã ã ã ã ã ã Real storage Management. ã ã ã ã External Page Storage Management 90:40 Recovery Management 90:45 90:50 90:55 Recovery Management Support. ã ã ã ã ã ã ã ã ã ã ã OLTEP ã ã ã ã ã ã ã ã ã ã ã ã ã Problem Determination Facilities Language Translators, service Programs, and Emulators. System Assembler _ ã ã ã ã ã ã ã ã ã Linkage Editor ã ã ã Utilities. ã ã ã ã ã Integrated Emulators OS MFT to OS/VSl Transition. ã summary of Advantages. ã ã Index Section 90). FIGURES Section 90 ã 29 ã 33 ã 38 ã 38 ã 38 ã 39 ã 40 ã 40 ã 41 ã 41 ã 42 ã 59 ã 59 ã 60 ã 67 ã 68 ã 68 ã 69 ã 69 ã 71 ã 71 ã 72 ã 72 73 ã 73 ã 76 ã 80 90.10.1 90.10.2 90.10.3 Virtual storage organization in OS/VSl ã ã ã ã ã ã ã ã ã ã 7 Real storage organization in OS/VS1 12 External page storage. real storage, and virtual storage relationship in as/VSl ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã 1tt 90.10.4 90.20.1 90.20.2 90.20.3 90.30.1 Page table entry contents for an initialized, inactive problem program partition. ã ã ã ã ã ã ã ã ã ã ã Components. functions. and data flow of JES. ã ã ã General flow of JES and job scheduling in OS/VS1 ã RES interface with JES ã ã ã ã ã ã ã ã ã ã ã organization of a control area for a VSAM key-sequenced ã 16 ã ã 32 ã 35 data set ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã 45 as/Virtual Storage 1 Features Supplement  90.30.2 90.35.1 90.35.2 Structure of the index for a VS M key-sequenced data set ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã Flow of the real storage allocation procedure. ã Example of page activity measurement ã ã ã ã ã ã ã ã ã ã ã 48 ã 62 ã 65 TABLES Section 90 90.05.1 90.05.2 90.15.1 90.20.1 90.30.1 90.30.2 Standard and optional features of OS/VS1 I/O devices   consoles   and terminals supported y OS/VS ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã oS/VS1 control and process program components. 4 5 ã 17 OS/VS1 operator commands that can be issued from an RES remote work station. ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã ã 36 Types of access supported for VS M data set organizations. 50 Comparison table of VS M and ISAM facilities for as. ã ã ã 55 as/Virtual Storage Features Supplement
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