IEAPAKxx can be found in the PARMLIB and contains groups of names of modules in the LPALST concatenation that are executed together or in sequence. IEAPAKxx is used only during a “cold” start (CLPA specified), when the PLPA is loaded from the LPALST concatenation. The system uses the specified IEAPAKxx […]
Virtual Storage means that each running program can assume it has access to all of the storage defined by the architecture’s addressing scheme. The only limit is the number of bits in a storage address. This ability to use a large number of storage locations is important because a program […]
Conceptually, mainframes and all other computers have two types of physical storage: – The physical storage located on the mainframe processor itself. This is called processor storage or real storage; think of it as memory for the mainframe. – The physical storage external to the mainframe, including storage on direct […]
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 […]
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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