MainFrame
MainFrame
The term ‘MainFrame’ brings to mind a giant room of electronic parts that is a computer, referring to the original CPU cabinet in a computer of the mid-1960’s. Today, Mainframe refers to a class of ultra-reliable large and medium-scale servers designed for carrier-class and enterprise-class systems operations. Mainframes are costly, due to the support of symmetric multiprocessing (SMP) and dozens of central processors existing within in a single system. Mainframes are highly scalable. Through the addition of clusters, high-speed caches and volumes of memory, they connect to terabyte holding data subsystems.
The first mainframe vendors were GE, Control Data, IBM, NCR, RCA, Burroughs, Honeywell and Univac. Collectively known as “IBM and the Seven Dwarfs”. Through mergers, these vendors shifted within the industry, becoming “IBM and the BUNCH”. Running a version of Unix or Linux, these vendors led by IBM now include Amdahl (Fujitsu), Unisys and Sun among others.
Online training includes the History of Mainframes, Job Control Language (JCL) and thorough tutorials on the components, transactions and functions of the Customer Information Control System (CCIS). Mainframe professionals can find well-paid work in highly respected and breakthrough technology companies throughout the world as Mainframe Systems Programmers and Project Managers.
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CICS Overview and Functions
CICS is called as Customer Information Control System. The main functionality of CICS is it acts as an interface between the Operating System and application programs.
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- CICS Components and Transactions
There are three major components associated with CICS namely Management Modules, Control Tables and Control Blocks. These three are very essential in CICS environment and so let us see an overview of the function of each.
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- Customer Information Control System (CICS)
In this tutorial you will learn about Customer Information Control System (CICS) - CICS - An overview, Functions of CICS, Task, Transaction and CICS Components.
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- Introduction to JCL
This article provides a basic coverage on concepts of MVS/JCL .The topics covered in this article are - Introduction to Job Control language, Basic concepts of JCL, Job & Job steps, Concepts of Job Statements and Positional & Keyword parameters.
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- Mainframe Introduction
In this Mainframe tutorial you will learn about mainframes and its concepts and some of the early mainframes describing the evolution and history of mainframes in detail. History and Evolution of Mainframes, Mainframe Channel, Direct Access Storage Device - DASD and Logical P...
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- Mainframe Features
In this Mainframe tutorial, you will learn about features of Mainframe - Processing power, memory capacity, performance, computing, multiple operating system, time sharing, reliability, serviceability, availability, clustering technology and other features available in Mainframe....
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- VSAM Introduction
In this Mainframe tutorial, you will learn about VSAM, what is VSAM, VSAM structure, types of VSAM datasets, Entry Sequenced Data Set (ESDS), Key Sequenced Data Set (KSDS), Linear Data Set (LDS) and Relative Record Data Set (RRDS).
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- VSAM Catalogs
In this Mainframe tutorial, you will learn about VSAM Catalogs, Master Catalog, User Catalog and Data Space of VSAM.
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- VSAM Structure
In this Mainframe tutorial, you will learn about VSAM Structure, four major areas of VSAM structure, what is VSAM cluster, VSAM components, Defining VSAM cluster and Example for defining VSAM clusters.
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- VSAM Control Interval and Control Area
In this Mainframe tutorial, you will learn about VSAM Control Interval, What is a Control Interval in VSAM? and Control Area, what is VSAM control area, attributes in the control area index component.
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- JES : Job Entry Subsystem
In this MainFrame tutorial, you will learn about JES : Job Entry Subsystem, Job Scheduler, types of JES, HASP, ASP, Job management of MVS, General Phases in a Job viz Input, Conversion, Processing, Output, Print and Purge.
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