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1、COBOL语言程序设计课程简介授课时间：24学时上机时间：8学时教材：COBOL语言DennyRen(任南明)电话：718-631-4535(USA);15105192674Email：dennyren11364@yahoo.comListofresourcesEnterpriseCOBOLforz/OSProgrammingGuideEnterpriseCOBOLforz/OSLanguageReferenceVSAMfortheCOBOLProgrammerbyDougLoweMurach’sMainframeCOBOLCOBOLProgrammer’sNotebookb
2、yJimKeoghReview…HLQ-high-levelqualifierPDS&PDSEVTOC-DSCBQSAM-Queuedsequentialaccessmethod(QSAM)filesareunkeyedfilesinwhichtherecordsareplacedoneafteranother,accordingtoentryorder.VSAM–KSDS,ESDS,RRDS,LDSSMS-StorageManagementSubsystem-automateddataandspacemanagement.Easiertoconverttonewdevice
3、.MasterCatalog–DSN,VOLUME,UNIT.AliasCatalogstructureRACF–none,read,write,control,allocz/VMRAS--reliability,availability,serviceabilityz/OS–JES,RACF,CICS,DB2,DFSMS,SDSF,TSO,VTAM,CATALOG,TCP/IP,etcAddressSpace-Therangeofvirtualaddressesthattheoperatingsystemassignstoauserorseparatelyrunningpr
4、ogramiscalledanaddressspace.IPLJCLUTILITY–IEBCOPY,IEBGENER,IDCAMSCatalogAcatalogconsistsoftwoseparatekindsofdatasets:abasiccatalogstructure(BCS);andaVSAMvolumedataset(VVDS).TheBCScanbeconsideredthecatalog,whereastheVVDScanbeconsideredanextensionofthevolumetableofcontents(VTOC).Thebasiccatal
5、ogstructureisaVSAMkey-sequenceddataset.TheVSAMvolumedatasetisaVSAMentry-sequenceddataset.VVDSrecordsforVSAMdatasetsarecalled“VSAMvolumerecords”(VVRs).EverycatalogconsistsofoneBCSandoneormoreVVDSs.Mostcatalogsearchesshouldbebasedoncatalogaliases.Whenappropriatealiases(化名)aredefinedforcatalog
6、s,thehigh-levelqualifierofadatasetnameisidenticaltoacatalogaliasandidentifiestheappropriatecatalogtobeusedtosatisfytherequest.UseIDCAMStodefineMastercatalog,UserCatalogandAlias.Eachsystemhasoneactivemastercatalogandcontainsaliasespointingtoalltheusercatalogs.DEFINEMASTERCATALOG–(NAME(VSCATL
7、G.SYS1.MASTCAT)–CYLINDERS(51)–VOLUME(ALTVOL)-ICFCATALOG)DEFINEALIAS–(NAME(PROJECTA)–RELATE(VSCATLG.ICFCAT.TEST01))LISTCATENT(your.vsam.dataset)TheVolumeTableofContentsandtheVTOCindexaresystemdatasetsthatmaintainextentandallocationinformationforavolume.th
