Posts related to storage on mainframe
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 […]
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 […]
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 […]
VSAM applies to both a data set type and the access method used to manage various user data types. VSAM data sets are held on direct access storage devices (DASD) auxiliary storage. VSAM divides its data set storage into control areas (CA), which are further divided into control intervals (CI). […]
To display all the Storage Groups of the currently active SMS configuration, we use the command: D SMS,SG(ALL) Example: D SMS,SG(ALL) IGD002I 15:24:57 DISPLAY SMS 749 STORGRP TYPE SYSTEM= 1 SGTSTVL POOL + SGDB2VL POOL + DUMMY DUMMY . SGOVRFL POOL * SGTAPE TAPE + ***************************** LEGEND ***************************** . THE […]
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