What is batch processing?

November 22, 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 […]

IPL Types

November 16, 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 […]

IPL (Initial Program Load)

November 16, 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 […]

JES2 Start Methods

November 13, 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 […]

Job Processing Phases in JES2

November 3, 2010 Rui Miguel Feio

Work to be processed by a z/OS system has to be defined using Job Control Language (JCL). JCL is used to define which program to execute, which resources to allocate, whom to notify, and so forth. This description of work is called a job. z/OS uses a Job Entry Subsystem […]

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