IBMMainframes COBOL Training Class3 So far we have

IBM-Mainframes COBOL Training Class-3

So far we have Covered § Introduction to COBOL. § Hello World!! COBOL program. § Introduction to JCL. § JCL Execution Program

The First Step. . § To work with the mainframes we need. § Mainframes IP address § Emulator software § Sufficient amount of bandwidth net connection. § To connect to the mainframes we should have emulation software in our system. § § Some of Emulation Software free of cost. Different Emulation software’s are VISTA, HUMMING BIRD, RUMBA, CITRIX, TELNET, etc,

Operating System on Mainframes § Multiple Virtual Storage, more commonly called MVS, was the most commonly used operating system on the IBM mainframes computer’s like System/370 and System/390 § z/OS is the computer Operating system for IBM's ZSeries 900 line of large mainframe servers. § z/OS is a renamed and upgraded version of OS/390, which in turn evolved from the MVS operating system. § Like its predecessor, OS/390, z/OS lays claim to being highly reliable for running mission-critical applications. The operating system supports Web- and Java-based applications.

Data. Sets § Dataset: A named collection of data in an IBM mainframe operating system. A data set in an IBM mainframe is the equivalent of a file in other operating systems § A dataset is typically stored on Direct Access Storage Disk (DASD) or magnetic tape. § These Dataset are of two types: § PDS (Partitioned Dataset ) § PS (Physical Sequential Dataset )

Partitioned Data Set & Physical Sequential Dataset § PDS or Partitioned Data Set is a dataset containing multiple partition’s each of which may contain a members § § Members are COBOL Programs, JCL Programs, Load Modules etc. § § PS or Physical Sequential Data Set is a dataset that contains records The Partitioned Data Set can only allocate on a single volume with the maximum size of 65536 tracks. Records like employee details, customer details etc. ,

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