AS400 - An Introduction (Part 1)

7/27/2019 AS400 - An Introduction (Part 1)

1/50

HCL Technologies Ltd.

An Introduction to theA S/400 / iSeri es / i5 Mid-Rang e Sys tem

(Part 1)

Joy Patnaik


2/50

Agenda

Introduction to AS/400, iSeries and i5

Getting Help Commands and Nomenclature of Commands Objects

Signing-On


3/50

What is an AS/400? Application System/400 - mid-range

application system from IBM Mid-Range - Between microcomputers and mainframe computers in

terms of processing speed, storage capacity and the number of users

that can be supported at once.

Expansion of S/38 architecture Also provided application program compatibility with S/36.

Provides robust support for Multi-user,multi-tasking, security, availability andease of operation


4/50

History of AS/400 AS/400 - result of the Silver Lake project at

IBMs Rochester centre (1988) Jul 1969 IBM introduces S/3 (System 3) IBM makes its debut in systems

smaller than mainframes Jan 1975 IBM introduces S/32 32 KB RAM, 13 MB HDD, KBD, Monitor of

240 characters (6 lines x 40 col) Apr 1977 IBM introduces S/34 256 KB RAM, 14 GB HDD, multiple

workstation support, support for printers, max 8 local users at a time Oct 1978 IBM introduces S/38 Architecture change, 32 MB RAM, 14 GB

HDD, 256 local workstations May 1983 IBM introduces S/36 7 MB RAM, 1.4 GB HDD, 72 local

workstations Jun 1988 IBM introduces the first AS/400 (AS stands for Application System,Expansion of S/38 architecture, Provided Application compatibility with S/36)


5/50

History continues Enhanced Series or e-series

1994 development began Foresaw potential of Internet Announced August 1997 New n-way processors up to 12-way First package machine

A server configured and preloaded with SAPsoftware


6/50

Moving from AS/400 to iSeries,then to i5

iSeries name introduced in 2000 i5 name introduced in 2004

Based on 64-bit microprocessor (POWER5) From OS/400 to i5/OS V5R3 From DB2/400 to DB2 UDB for iSeries Run i5/OS, Linux, Windows and UNIX (AIX) on a

single server Enables server consolidation aided by legendary availability

Capacity On-Demand (CoD) Computingresources permanent and temporary for immediate and future needs


7/50

Why does a company use an AS/400?

Cost effective Reliable Easily upgraded as business grows

Supports state-of-the-art technology Doesnt require a large support staff Fully integrated hardware and software

components database,security, communication and internet components

Technology-Independent (TIMI)


8/50

System Architecture - 1 Single-Level Storage

No distinction between disk storage (DASD) and main memory One large storage area combining disk storage (DASD) and main

memory = single address space = Single-level storage.

Object must be in memory to use or operate on OS/400 enjoys very large virtual memory. This enables programs andusers asking for data by name / pointer and not by address (Capability-based addressing scheme)

Technology Independent Machine

Interface (TIMI) Enables business to exploit changes to hardware and softwaretechnology without causing disruption to existing applications

Technology neutral architecture (more details in next slide) Application does not deal with storage device specifics


9/50

System Architecture - 2

AS/400 machine - defined as a softwareinterface in a Layered Architecture

HLL (High-Level Language programs)

ISS (Integrated System Services) / OS/400 MI (Machine Interface) Defines a logical (rather than

physical) machine LIC (Licensed Internal Code) / VMC (Vertical Microcode) /

IMPI (Internal Machine Program Instruction) / Operating

System Supervisor Insulates higher layers from anyhardware change SLIC (System Licensed Internal Code) / HMC (Horizontal

Microcode) True microcode (control solid state circuits) Solid State Hardware


10/50

System Overview

Application Software Application Software

OS/400 OS/400

Machine Interface (MI) Machine Interface (MI)

Vertical LicensedInternal Code (VLIC)

System LicensedInternal Microprocessor

Interface(IMPI)

Internal Code(SLIC)

Horizontal LicensedInternal Code (HLIC)

Object Based Kernel

HardwareCISC Processor

48-bit Addressing

HardwareRISC Processor

64-bit Addressing

AS/400 ArchitectureUsed in

48-bit CISC-basedSystems

AS/400 ArchitectureUsed in

64-bit PowerPC RISC-based Systems

T 1.1 - AS/400 layered software architecture .


11/50

AS/400 Features - 1

Several choices of models can balance between requirement and financial budget.

64-bit processor 64-bit memory addressing means large working storage memory provides enhanced arithmetic capabilities

OS/400 Object-based OS

Hot-Plugging Add or Remove an I/O device/card without shutting down the server


12/50

AS/400 Features - 2

Single Level Storage Auxiliary storage is treated as an extension of the working storage OS/400 enjoys very large virtual memory

Integrated RDBMS DB2/400 provides a high level of security as the control to DB2/400 is

controlled by OS/400

Double Byte Character Set Allows users to generate characters more than EBCDICs usual set AS/400 is used to represent more than 50 languages in the world


13/50

AS/400 Features - 3

Most secured operating system of industry Various logs and Audit trails makes system C2 level secured.

LPAR Logical Partitioning offers multiple environments on same server User can run Windows NT, LINUX

Multi-threaded environment Multiple subsystems manage concurrent jobs.


14/50

AS/400 Key Advantage

Software Applications do not have to bechanged or recompiled with the operatingsystem changes and/or hardwarechanges.

No-pain transition from older OS/400 versions to laterversions

No-pain transition from older CISC (Complex Instruction SetComputing) microprocessor architecture to newer RISC

(Reduced Instruction Set Computing) architecture in 1995CISC

Instruction length variableRISC

Equal instruction lengthFrom 48-byte to 64-byte word size


15/50

IBM AS/400 Help F1 = HELP Field-level Help Extended Help Info Centre of IBM

http://publib.boulder.ibm.com/infocenter/iseries/v5r3/index.jsp?topic=/rzahg/rzahgictoc.htm


16/50

Naming of Commands - 1

Based on English!Combination of Verb and Noun

CRTLIB

LibraryCreate


17/50


Typically start with the following verbs:

CL Verb English DescriptionCALL Call Executes a programGO Go to Executes a MenuCPY Copy Copies a fileCRT Create Creates an objectDSP Display Displays something about an

objectWRK Works With Works with an object


18/50


Some typical nouns

CL Noun English DescriptionLIB Library Object that holds ObjectsLIBL Library List List of Libraries for a JobOUTQ Output Queue Object that stores Spool FilesJOBQ Job Queue Object that stores Batch Jobs to

be processed

FD File Desc Description of fileF File Object that stores dataUSRPRF User Profile Object that lists attributes about

a Sign On Id


19/50

Command Help

How do I find the exact syntax (including keywords) of acommand?

Answer: Use AS400 MenusUse AS400 Prompts (F4)

by pressing F4 at a Command lineby typing command and pressing F4

How do I find the Keywords to a command?

Answer: Type the command and press F4


20/50

CL Commands (Examples) AS400 Menus

Menu Description

MAIN Main MenuPROGRAM Programmers MenuMAJOR Sorts CommandsCMDCPY Copy CommandsCMDDSP Display CommandsCMDWRK Work With CommandsCMDLIB Library CommandsCMDMSG Message CommandsCMDOUTQ Output Queue CommandsCMDUSRPRF User Profile Commands


21/50

* (Asterix)

When used before an AS/400 word,indicates that the word is a special value.

eg. CRTLIB LIB(MOOGK1) TYPE(*TEST)

When used at the end of a word,indicates a generic combination of alphanumerics (wildcards).

eg. WRKLIB SIMON*


22/50

Use of the ?

Entering a command to see all possiblevalues for a parameter.

F4 does the same


23/50

What is an Object?

OS/400 objectis a named unitexists (occupies space) in storageoperations are performed on it by the operating

system.

Has a Description

Has an Object Type


24/50

Object Structure

Object name, type, owner, library,etc.

ObjectHeader

PortionThis could be a files data,program statements, etc.

FunctionPortion of Object


25/50


26/50

Object Types

Object Type is assigned to the Object attime of creation

eg. CRTLIB creates objects with a type of *LIB

Certain types of commands only workwith certain types of Object Types

eg. DSPUSRPRF


27/50

Object Types - Examples

*CMD Command*LIB Library

*FILE File*PGM Program

(These and other Object Types will be covered in more detail

in later sessions. For now think of Objects as the basic buildingblocks of the AS/400. Anything that isexistent on the AS/400 including anything that you create for an application - is anObject)


28/50

Object Attributes

*FILE

Physical Logical Display Printer ICF

Source Data Screen Menu

Members


29/50

Common Features of an

Object - 1Each object has a nameEach object has a set of attributes that

describe itSpecific values are assigned for those attributesGenerally, objects are independent of all

other objects.However, some objects must be created before other

objects can be created;For example, a logical file cannot be created if the physical

file it must be based on does not exist.


30/50

Common Features of an

Object - 2Objects must be created before other

operations that use the object are

performed.Objects have either a simple, qualified,or generic name.

Will be covered in more detail in subsequent sessions


31/50

Storing Objects - 1

All non-Library objects are stored inLibraries (containers of objects)

Special Rule : QSYS library contains all other libraries

Some objects cannot be stored in user-provided libraries.

Example : *AUTL (Authorization List)


32/50

Storing Objects - 2

When a user creates an object and alibrary qualifier can be specified but is

not, the object is stored in the user'scurrent job library.The user profile for each user specifies the user's current

library.The current library will be QGPL if it is not specified

otherwise.


33/50

Client Access Windows-based software to access the

AS/400 Simulates 5250 terminals of the AS/400 Has 24 function keys

F1-F12 and Shift-F1 thru Shift-F12

Can be customized for keys


34/50

The Sign-on Screen First level of security Keeps out unauthorized people

Requires valid user-id and password Can specify initial program to execute (andwhere to pick-up that program from)


35/50

The Sign-on Screen


36/50

Main Menu


37/50

Major Menu


38/50

Verb Menu


39/50

Clear Commands Menu


40/50

Clear Physical File Command


41/50

? in Member Parameter


42/50

Definition of the Member

Parameter (Field Level Help)


43/50

Definition of the CLRPFM

Command (Extended Help)


44/50

CL Syntax

Command-name

(space) parameter


45/50

Commands not Requiring

ParametersWRKJOBWRKACTJOBWRKSBMJOB


46/50

Keyword vs Positional

NotationKeyword

WRKOUTQ OUTQ(PRT01)

CRTLIB LIB(MOOGK10) +TEXT(Cindys Library) Positional

WRKOUTQ PRT01

CRTLIB MOOGK10 *PROD CindysLibrary


47/50

System Request - 1System Request

System: BIGBLUESelect one of the following:

1. Display sign on for alternative job2. End previous request3. Display current job4. Display messages5. Send a message6. Display system operator messages7. Display work station user

10. Start system request at previous system11. Transfer to previous system

13. Start system request at home system14. Transfer to home system

90. Sign offMore...

Selection ______

F3=Exit F12=Cancel(C) COPYRIGHT IBM CORP. 1980, 1998.

Figure 2.4 System Request Menu


48/50

System Request - 2Option #1 This option displays a sign on screen for an

alternative job. After signing on to an alternative job, you can than use this option to toggle between your primary and secondary job. (Note:only one session is active at a time.)

Option #2 This message CANCELs your previous command(action).

Option #3 This option allows you to display your current jobinformation.

Option #4 This option allows you to display messages thathave been sent to you.

Option #5 This option allows you to send a message.Option #6 This option lets you display message on the

QSYSOPR (the system operators) messagequeue.

Option #7 This option allows you to display informationabout the jobs running from your workstation.

Option#10, 11,13, and 14

These options apply to networks of systems andmay not be displayed on your system.

Option #90 This option allows you to sign-off of the session.


49/50

AS/400 Operations

OS400 Command Structure

Message Handling

Managing Devices

Handling Spooled Files and Printing Functions Operating System, Licensed Program Products, and PTFs

Security

Starting and Stopping the AS400

Work Management and Performance

Working with Jobs Basic Troubleshooting, Problem solving, and Using Electronic Customer Support

Subsystems

h AS/400 i G
http://localhost/var/www/apps/conversion/tmp/scratch_5/OS400%20Command%20Structure.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Message%20Handling.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Managing%20Devices.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Handling%20Spooled%20Files%20and%20Printing%20Functions.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Operating%20System,%20Licensed%20Program%20Products,%20and%20PTFs.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Security.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Starting%20and%20Stopping%20the%20AS400.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Work%20Management%20and%20Performance.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Working%20with%20Jobs.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Basic%20Troubleshooting,%20Problem%20solving,%20and%20Using%20Electronic%20Customer%20Support.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Subsystems.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Subsystems.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Basic%20Troubleshooting,%20Problem%20solving,%20and%20Using%20Electronic%20Customer%20Support.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Working%20with%20Jobs.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Work%20Management%20and%20Performance.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Starting%20and%20Stopping%20the%20AS400.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Security.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Operating%20System,%20Licensed%20Program%20Products,%20and%20PTFs.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Handling%20Spooled%20Files%20and%20Printing%20Functions.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Managing%20Devices.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/Message%20Handling.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_5/OS400%20Command%20Structure.ppt


50/50

The AS/400 is GreenScreen Usually !

Green screen v.s. GUI (Graphical User Interface You cant point and click! You must use the TAB keys to go from field to field

In recent OS versions, GUI interfaceshave been made easier to implement

Documents

AS400 - An Introduction (Part 1)