Chapter-2-OS-390-and-z-OS-Concepts-an.pdf
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Chapter-2-OS-390-and-z-OS-Concepts-an.pdf

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Murach'sOS/390andz/OSJCLbyRaulMenendezandDougLoweMikeMurach&Associates,Inc..(c)2002.CopyingProhibited.ReprintedforYueChen,IBMchenyyue@cn.ibm.comReprintedwithpermissionasasubscriptionbenefitofBooks24x7,http://www.books24x7.com/Allrightsreserved.Reproductionand/ordistributioninwholeorinpartinelectronic,paperorotherformswithoutwrittenpermissionisprohibited.iTableofContentsChapter2:OS/390andz/OSConceptsandTerms.......................................................................1Virtualstorageandmultiprogrammingconcepts....................................................................1Addressspaces................................................................................................................1Multiplevirtualstorageandpaging..................................................................................3Howaddressspacesareorganized.................................................................................6Dataspacesandhiperspaces...........................................................................................9HowOS/390managesdata.................................................................................................11Datasetlabelsandnames.............................................................................................11Howdatasetsareorganized.........................................................................................13Howpartitioneddatasetswork......................................................................................15Thecatalogfacility.........................................................................................................17Binary,hex,andEBCDICnotation.................................................................................19HowOS/390processesdatasets........................................................................................21Howdatasetsareallocated...........................................................................