as 400 features
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AS/400Features
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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.
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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
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Layered Machine ArchitectureIMPIMIAPI
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High level of integration
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Object Orientation
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Singe Level Storage
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Capability Based System
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Hierarchy of MicroprocessorsThe N-Way microprocessor capability
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Operating System - OS/400 Work, Query, Security ,
Communication, Network Management.
Utilities – SEU , SDA , RLU , PDM Database DB2/400
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Multilingual Support
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OS/400 CommandsCL interface – menu and
command lineCommand Verb + Noun
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Comprehensive security to all system resources
• Minimal security• Password security• Resource security• Resource security and Operating
System Integrity• C2 level of security
SecuritySecurity
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File SystemsIntegrated File
SystemTraditional File
system
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Productive application development environment.
• Programmers menu• Application development toolset• Interactive debug
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Other features
• System availability• Disk mirroring• Checksum protection• Journalling support• API support
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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
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Strengths of IBM
• Hardware• Reliable• Meant for non-stop operation• Modular - easily expandable• Good connectivity with non-IBM systems
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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
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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
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Communications• System Network Architecture (SNA)
• 7 layered• Similar to OSI
• LAN is Token Ring configuration
• Supports X.25 protocol
• Also supports TCP/IP protocol
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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……
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Programming languages
• CL the job control language• RPG/400 Report program
generator• COBOL/400 Common business
oriented language
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Thank You MSDand
all the growing Audience supporting
the best of the technology