Automating Mainframe CI/CD with GitHub Actions: A Practical Guide
The venerable world of mainframes is undergoing a revolution. Gone are the days of siloed processes and manual deployments. Enter […]
The venerable world of mainframes is undergoing a revolution. Gone are the days of siloed processes and manual deployments. Enter […]
In the bustling world of technology, where trends ebb and flow with dizzying speed, the mainframe remains a stoic titan. […]
Understanding the Difference Between DUMMY and NULLFILE in Mainframes Introduction: Mainframes have been an integral part of the computing industry […]
Introduction: In the world of mainframe computing, the Job Control Language (JCL) serves as a crucial component for managing and […]
z/OS provides various dataset types to cater to different data storage and access requirements. Sequential datasets offer straightforward linear access, while partitioned datasets allow logical grouping of related members. VSAM datasets provide indexed or direct access capabilities, while temporary datasets offer temporary storage during program execution. GDGs provide version control and historical data retention capabilities.
0 (None): No sharing is allowed. The file can only be accessed by one program at a time.
1 (Read): Multiple programs can read the file simultaneously, but no program can write to it.
2 (Update): Multiple programs can read and write to the file simultaneously, but changes made by one program are not immediately visible to other programs.
3 (Exclusive): Only one program can access the file at a time, and no other program can read or write to it.
b) Share Level:
The first step to programming on mainframes is to learn the programming languages that are commonly used, such as COBOL and PL/I. These languages are designed to work with the mainframe environment and will be required to write, test, and run programs on the mainframe.
IEBCOPY is a utility program in the IBM z/OS operating system that is used to copy data from one data set to another. It is particularly useful when you want to copy data sets with large block sizes, or when you want to copy data sets with different organization, record format, or block size. IEBCOPY can also be used to copy data between data sets with different data formats, such as ASCII and EBCDIC. It can also be used to reformat data while it is being copied, by using the “INDDN” (input data definition name) and “OUTDDN” (output data definition name) parameters to specify different data definitions for the input and output data sets.
An EXEC (or execute) statement defines the beginning of a step in a job or a procedure. […]
Initially, when the computers were new to the world, the size of the computers was huge and very clumsy to […]