IBM大型机培训资料之1-OS390

OS390 & z/OS An Introduction

What is IBM Mainframe?

Mainframe – Large, Powerful, Central computer capable of supporting many hundreds or thousands of users simultaneously IBM Mainframe – Specify the series of computers produced by IBM

Advantages

Reliability Recoverability Redundancy Connectivity Concurrency Capacity

Security Compatibility ...

History

1960s System 360

Overall Services Over 10 models offered Architecture innovations for future upward compatibility

Base-register addressing mode Microprogramming

1970s System 370

MVS Virtual Storage (24-bit) Multi-processing Two compatible product lines

30XX - large systems 43XX - mid-range systems

History

1980s System 370/XA

MVS/XA Virtual Storage (31-bit) Expanded storage added to 3090 model - a new form of processor storage, separate from main storage

Mid 1980s ESA 370 (Enterprise System Architecture)

Access to data spaces - another form of virtual storage MVS/ESA Virtual Storage (N*2G)

History

1990s ESA 390 and System 390

ESCON - Enterprise System Connections - fiber optic I/O Parallel Sysplex - coupling capable processors

21st Century

ZOS Virtual Storage (64-bit) Intelligent Resource Director (IRD)

OS390 ArchitectureD C S T B I D S 2 C F O S I I S D S F T C P / I P D I T T O N E T V I E W R A C F D F S M S

VTAM JES2 OS/390

z/OS ArchitectureLAN ServicesCommunications Server SecureWay Security Services

Systems Management

Softcopy Services

CICS

IMS/TM

p. Services

Distributed Computing

System Services TSO Batch UNIX APPC STC Application UNIX System Enablement Services

ApplicationsDB2 IMS/DB

nonVSAM

VSAM

HFS

Major Elements

DFSMS

Storage Management Data Management Device Management System Display and Search Facility Optional feature of OS/390 Monitor, manage and control MVS/JES2 system Time Sharing Option Allows users to interactively share computer time and resources

SDSF

TSO

Major Elements

DITTO

Data Interfile Transfer Testing and Operations Utility Allows users to display, modify, delete, copy, print physical records of a VSAM or sequential file IBM’s foundation for enterprise management Network management products provides tools for managing complex multi-vendor networks from a single point of control Interactive tool Helps you develop and maintain panels, panel groups, partition sets and control tables

NETVIEW

SDFII

Major Elements

VTAM

Virtual Telecommunications Access Method Provides interface between applications in a host processor and other resources in an SNA network

TCP/IP JES2

Job Entry Subsystem Provides functions to get jobs into, and output out of the OS/390 system Resource Access Control Facility Component of the OS/390 security server

RACF

RACFGeneral Users Logon

System With RACF User Identification and Verification Resource Authorization CheckingAccess

Resources

CICS TransactionData Set

IMS TransactionVM Mini Disk

Tape

Access Violation

Logging and Reporting AdministrationLook at Profile and Set Logging Security Administration

Access Event

SMF

Report

AUDITORSPECIAL

RACF Database

Major Elements

UNIX System Services Application Services

Enables two open systems interfaces on the OS/390 operating system:

An Application Program Interface (API) An interactive OS/390 shell interface

UniprocessorCentral Processor MVS Storage Channel Subsystem

MultiProcessorCP CP MVS CP CP

StorageChannel Subsystem

Partitioning MultiprocessorCP MVS CP CP MVS CP

StorageCSS

StorageCSS

Logical Partitioning -LPARCentral Processor

PR/SMMVS Storage CSS MVS Storage CSS

SYSPLEXS Y S P L E X

S Y S P L E X

X C F

XCFSINGNALING PATHS

X C F

XCF COUPLE DATA SET

System Initialization

Load

Parms from SYS1.PARMLIB Members from SYS1.NUCLEUS

Initial Program LoadBuild first address spaces and other system address spaces Initial master catalog and system datasets

Load ParameterLOAD ADDRESS XXXXSYSRES VOLUME ADDRESS

LOAD PARM

DDDDXXSN

N: 1 – 9 NUCLEUS IEANUC 0n

IODF VOLUME ADDRESS

LOADXX

MESSAGE SUPPRESSION S: Suppress Message P: Suppress Message Prompt M: Display Messages A: Display Messages Prompt

Load IPL

Load nucleus

Load selected members of SYS1.NUCLEUS Nucleus Initialization Program (NIP) receives control from the IPL program

Locate master catalog and other data sets

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