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AS/400Features
Ease of Installation and Use
• System supplied menus enable a novice user to install and automatically configure the system and local devices
• Extensive online help text and context sensitive help is available with index search facility.
Virtual Memory Based System addressing scheme that allows external disk
storage to appear as main storage • Implemented as a combination of main
storage and secondary storage Logical storage available for each program or task irrespective of the size of real storage
• Introduced in AS/400 architecture to free the constraints imposed by the size of the main storage
Layered Machine ArchitectureIMPIMIAPI
High level of integration
Object Orientation
Singe Level Storage
Capability Based System
Hierarchy of MicroprocessorsThe N-Way microprocessor capability
Operating System - OS/400 Work, Query, Security ,
Communication, Network Management.
Utilities – SEU , SDA , RLU , PDM Database DB2/400
Multilingual Support
OS/400 CommandsCL interface – menu and
command lineCommand Verb + Noun
Comprehensive security to all system resources
• Minimal security• Password security• Resource security• Resource security and Operating
System Integrity• C2 level of security
SecuritySecurity
File SystemsIntegrated File
SystemTraditional File
system
Productive application development environment.
• Programmers menu• Application development toolset• Interactive debug
Other features
• System availability• Disk mirroring• Checksum protection• Journalling support• API support
ADVANTAGE AS/400
• High processing speed (100 to 750 MIPS - Million Instructions Per Second)
• Capacity to store and handle huge amounts of data
• Ability to run multiple applications simultaneously
• Support large number of users – 1 to 100 or even more
Strengths of IBM
• Hardware• Reliable• Meant for non-stop operation• Modular - easily expandable• Good connectivity with non-IBM systems
Strengths of IBM (Cont...)
• Software• Compatibility maintained from the oldest
to the latest OS and sub-systems• Older applications can run on the latest
OS• Excellent recovery features• Secure - no threat from viruses etc.• Keeps up with the connectivity features
of the hardware
IBM Terminology
IPL Initial Program Load - Boot the system (Loading the operating system(s) )
Sub-system A functional unit, such as database manager or user interface, which can run directly under the operating
SystemPanel [Group]/Map A physical screen of dataJob A background process, which
executes one or more programs in a particular sequence
ABEND ABnormal END of Task/Program/Job
Communications• System Network Architecture (SNA)
• 7 layered• Similar to OSI
• LAN is Token Ring configuration
• Supports X.25 protocol
• Also supports TCP/IP protocol
Database support• DB2 for OS/400 – Relational database
Management system• Support for SQL – Declarative referential
integrity and stored procedures.• Triggers• Two phase commit transaction
management• Data replication , multiple level
concurrency control , National language support
• ODBC and much more……
Programming languages
• CL the job control language• RPG/400 Report program
generator• COBOL/400 Common business
oriented language
Thank You MSDand
all the growing Audience supporting
the best of the technology