ALTERING GDG DEFINITION 5. DELETING GDG 6. IMPORTANT PRACTICAL QUESTIONS 1. INTRODUCTION Generation Data Groups or GDGs are a group. This facility is called Generation Data Groups (GDG). . There are two types of mainframe processes: Batch Processing Online Transaction Processing. JCL & VSAM: Hi all, I want to know the major difference between the dataset and GDG. reagrds akshatha.

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Permission to use, copy, modify and distribute this software, documentation or training material for any purpose requires a fee to be paid to SimoTime Technologies. The relative name is a signed integer used to refer to the latest 0the next to the latest -1and so forth, generation. All of the data sets in the group can be referred to by a common name. In a standardised JCL, the program to be executed and its related datasets are placed within a cataloged procedure, which is called in the JCL.

The documentation and software were developed and tested on systems that are configured for a SIMOTIME environment based on the hardware, operating systems, user requirements and security requirements. Generation data sets have sequentially ordered absolute and relative names that represent their age.

New system-managed data sets are always gdb when allocated, with the volume assigned from maniframe storage group. Notice the appended segment of GV00 on the data set name. A good place to start mainfdame The SimoTime Home Page for access to white papers, program examples and product information.

Explore An Enterprise System Model that describes and demonstrates how Applications that were running on a Mainframe System and non-relational data that was located on the Mainframe System were copied and deployed in a Microsoft Windows environment with Micro Focus Enterprise Server.

If any of the GDG versions are set with an expiration date which is yet to expire, then those are not deleted and hence the GDG base is retained. If a user has a SimoTime Enterprise License the Documents and Program Suites may be available on a local server and accessed using the icon. This is called Backward Referencing.


JCL – Defining Datasets

Whether you want to use the Internet to expand into new market segments or as a delivery vehicle for existing business functions simply give us a call or check the web site at http: Software Agreement and Disclaimer.

We have a team of individuals that understand the broad range of technologies being used in today’s environments. The model data only needs to be a VTOC entry and does not require disk space to be used. SimoTime Technologies makes no warranty or representations about the suitability of the software, documentation or learning material for any purpose.

A typical sequence of events is to submit the jobs described in Steps to Enterprise Server and then review the results. The SimoTime name or Logo may not be used in any advertising or mainfrxme pertaining to the use of the software without the written permission of SimoTime Technologies.

What is a generation data group?

The following is a summary of the jobs or JCL members included in this suite of programs and a typical aminframe of execution and review.

The purpose of this suite of programs is to provide examples for creating and processing Generation Data Groups GDG’s.

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The SimoTime Home Maniframe.

Quite often, to reach larger markets or provide a higher level of service to existing customers it requires the newer Internet technologies to work in a complementary manner with existing corporate mainframe systems. JCL, Execute the Jobs.

Copyright IBM Corporation Explore the Glossary of Terms for a list of terms and definitions used in this suite mainfrae documents and white papers.


A generation data group GDG base is allocated in a catalog before the generation data sets are cataloged. An EMPTY parameter specifies that when the limit is reached the three 3 current files will be deleted and the process will start again with the new file.

If the attributes and organizations of all generations in a group are identical, the generations or individual data sets may be retrieved together as a single data set. The preceding job that is described in Step 6 created an output file. The Gnnnn is a generation number from to and the Vnn is a volume number from 00 to 99, this is typically We reserve the right to make changes without notice at any time.

Process a Generation Data Group. Define a GDG Base. Program Input and Output. Delete Functions, Use with Caution. That is, each data set is historically related to the others in the group. Outdated or obsolete generations can be automatically deleted by the operating system.

These tables are provided for individuals that need to better understand the bit structures and differences of the encoding formats. If the attributes and organizations of all generations in a group are identical, the generations can be retrieved together as a single data set. The operating system’s catalog management routines use the absolute generation name.

What is a GDG?

If you have any questions, maonframe, comments or feedback please call or send an e-mail to: Submit the jobs described in steps and review the results. The GV00 has been deleted. Delete a Generation Data Group. For example, the data set name LAB.