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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The documentation and software were developed maijframe tested on systems that are configured for a SIMOTIME environment based on the hardware, operating systems, user requirements and security requirements. The GV00 has been deleted. When technology complements business. The remaining generation gdf sets will be retained. The Gnnnn is a generation number from to and the Vnn is a volume number from 00 to 99, this is typically Program Input and Output.

The DSN value can be made up of ydg each of 1 to 8 characters length, separated by periods and of total length of 44 characters alphanumeric. We have a team of individuals that understand the broad range of technologies being used in today’s environments.

The program was tested using Micro Focus Net Express, version 5. Next, run the jobs described in Steps to create additional data sets. We specialize in preparing applications and the associated data that are currently residing on a single platform to be distributed across a variety of platforms.

Generation Data Groups (GDG’s), an Introduction with Examples

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: Other uses will require a SimoTime Software License. We appreciate hearing from you. This link requires an Internet Connection. Following is the syntax:. Our customers include small businesses using Internet technologies to corporations mainfrane very large mainframe systems.

The input used by this suite of programs is generated within the programs.

SimoTime has the technology, services and experience to assist in the application and mainvrame management tasks involved with doing business in a multi-system environment. Submit the jobs described in steps and review the results. Therefore, adjustments may be needed to execute the jobs and programs when transferred to a system of a different architecture or configuration.


The data will need to be transferred between the systems and may need mainframee be converted and validated at various stages within the process. Define a GDG Base.

Concept Solutions Corporation: What are Generation Data Groups (GDG)

If you have any questions, suggestions, comments or feedback please call or send an e-mail to: 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. Once the GV00 is reached the numbering will start again from GV SimoTime Technologies shall not be liable for any direct, indirect, special or consequential damages resulting from the loss of use, data or projects, whether in an action of contract or tort, arising out of or in connection with the use or performance of this software, documentation mainframs training material.


The SCRATCH parameter specifies that the oldest generation data set will be uncatalogued and deleted when the generation limit is exceeded. We reserve the right to make changes without notice at any time. A SimoTime License is required for the items to be made available on a local system or server.

The intent is to provide changes as the need arises and in a timeframe that is dependent upon the availability of resources. SimoTime Technologies makes no warranty or representations about the suitability of the software, documentation or learning material for any purpose.

We specialize in the creation and mainfgame of business applications using new or mainfrxme technologies and services. The operating system’s catalog management routines use the absolute generation name. The function delivered in this version is based upon the enhancement requests from a specific group of users.

The two zeroes on the end of the name are used to represent a volume number that is used when the file is stored mainframw media requiring the use of multiple volumes. If the attributes and organizations of all generations in a group are identical, mainfrmae generations or individual data sets may be retrieved mainframr as a single data set.


Software Agreement and Disclaimer. For example, the data set name LAB. The following is a summary of the jobs or JCL members included in this suite of programs and a typical process gg execution and review. 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. In the world of programming there are many ways to solve a problem.

This suite of programs and documentation is available to download for review and evaluation purposes. Before you create the files that attach to a GDG base you may want to create a model dataset that contains maimframe DCB information for the files.

The SimoTime Home Page. Delete Functions, Use with Caution.

Temporary datasets need storage only for the job duration and are deleted at job completion. This is called Backward Referencing.

The preceding job uses the IEFBR14 program a system supplied program that simply does a return to caller with a return code of zero in conjunction with a DD statement to create the model. Hence, the dataset is deleted when the job completes execution. 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.

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

What is a GDG?

The preceding job should be used with caution. GDG is created as the output. Please note that the dataset is referred as STEP1.

A ggd sequence of events is to submit the jobs described in Steps to Enterprise Server and then review the results. The purpose of this suite of programs is to provide examples for creating and processing Generation Data Groups GDG’s.