Tech – Mainframe

Posts related to the mainframe world

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Glossary

What is a Catalog?

1st December 2010 Rui Miguel Feio
A catalog describes data set attributes and indicates the volumes on which a data set is located. When a data set is cataloged, it can be referred to by name without the user needing to specify where the data set is stored. Data sets can be cataloged, uncataloged, or recataloged. […]
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Glossary

What is batch processing?

22nd November 2010 Rui Miguel Feio
Batch processing is a method of running a program or a series of programs in which one or more records (a batch) are processed with little or no action from the user or operator. A program that reads a large file and generates a report, for example, is considered to […]
FAQ
MVS

IPL Types

16th November 2010 Rui Miguel Feio
You may use one of three types of initialization: Cold start, quick start, or warm start. The primary difference between the three types is whether or not certain storage is treated. Cold start   An IPL that loads (or reloads) the Pageable Link Pack Area (PLPA) and clears the Virtual […]
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Glossary

IPL (Initial Program Load)

16th November 2010 Rui Miguel Feio
z/OS initialization, or an Initial Program Load (IPL), is the act of loading a copy of the operating system from disk into the processor’s real storage and executing it. This process essentially consists of: –    System and storage initialization, including the creation of system component address spaces –    Master scheduler […]
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JES

JES2 Start Methods

13th November 2010 Rui Miguel Feio
The following are the three possible JES2 start methods: 1. WARM – This is the default start method. – WARM specifies that JES2 is to continue processing jobs from where they were stopped. – If the FORMAT option was also coded, then JES2 will ignore the WARM specification and perform […]