MVS

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Control Blocks

27th October 2010 Rui Miguel Feio
As instructions execute the work of a computer system, they keep track of this work in storage areas known as control blocks. Generally speaking, there are four types of z/OS control blocks: – System-related control blocks – Resource-related control blocks – Job-related control blocks – Task-related control blocks Each system-related […]
FAQ
Glossary

Dynamic Address Translation (DAT)

27th October 2010 Rui Miguel Feio
Dynamic Address Translation, or DAT, is the process of translating a virtual address during a storage reference into the corresponding real address. If the virtual address is already in real storage, the DAT process may be accelerated through the use of a translation lookaside buffer; if the virtual address is […]
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MVS

Interrupt Processing

27th October 2010 Rui Miguel Feio
An interrupt is an event that alters the sequence in which the processor executes instructions. An interrupt might be planned (specifically requested by the currently running program) or unplanned (caused by an event that might or might not be related to the currently running program). z/OS uses six types of […]
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MVS

Generation Data Group (GDG)

18th September 2010 Rui Miguel Feio
GDG is a collection of historically related non-VSAM data sets that are arranged in chronological order. Each data set within a GDG is called a generation data set (GDS) or generation. Within a GDG, the generations can have like or unlike DCB attributes and data set organizations. If the attributes […]