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What is IMS Transaction Manager
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Written by Philip L Yuson   

IMS is a transaction manager and database system for the mainframe. This article provides a brief overview of the transaction manager.

In a previous article (What is an IMS Database), I discussed about IMS databases. IMS is more than a database system. It also manages online transactions. If you need to know what an online transaction is, please read my previous article ( Types of Processing on the Mainframe: Batch and Online)

 
What is an IMS Database
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Written by Philip L Yuson   

Information Management System (IMS) is a database and transaction management system for IBM mainframes. This article gives a basic overview of IMS Databases

 
Types of Mainframe Processing: Batch and Online
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Written by Philip L Yuson   

There are two types of mainframe processes: Batch Processing and Online Transaction Processing. Read this article to find out what these are.

 
What is a Job Entry Subsystem (JES)
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Written by Philip L Yuson   

The Job Entry Subsystem (JES) manages jobs within an MVS system. This article discusses the various stages in the lifecycle of a job.

 
What are Generation Data Groups (GDG)
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Written by Philip L Yuson   

MVS has a facility that allows you to keep versions of a file. This facility is called Generation Data Groups (GDG).

 
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