z/OS V1R6.0 DFSMS Access Method Services for Catalogs

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BLDINDEXDFSORT. See z/OS DFSORT Application Programming Guide for a list of reservedddnames. This parameter is not allowed if you use NOSORTCALL orSORTMESSAGELEVEL (NONE).Abbreviation: SORTMDD SMDDSORTMESSAGELEVEL({ALL|CRITICAL|NONE})is the level of DFSORT messages to print to the DFSORT message data set. Youcannot use this parameter with NOSORTCALL.Abbreviation: SORTML SMLALLRequires that all DFSORT messages and control statements are printed tothe message data set.CRITICALAllows only critical DFSORT messages to print to the message data set. NoDFSORT control statements are printed. Critical is the default.NONEAllows no DFSORT messages or control statements to print to the messagedata set.WORKFILES(ddname[ ddname...])names the DD statements that describe the name and placement of the workfiles you want BLDINDEX to define if you require an external sort of thekey-pointer pairs. See the CATALOG parameter for further description ofwhere the work files are defined. You can use DD statements to describe twowork files that are defined and opened before the BLDINDEX routine beginsprocessing the base-cluster’s data records.Exception: Do not use tape data sets as work data sets.If one of the data sets is SMS-managed, the other must either be SMS-managedor a non-SMS-managed data set cataloged in the catalog determined by thecatalog search order.When you code the DD statements that describe the work files and identifythem with the standard ddnames IDCUT1 and IDCUT2, you do not need touse the WORKFILES parameter.Abbreviation: WFILECalculating Virtual Storage Space for an Alternate IndexWhen BLDINDEX builds an alternate index, access method services opens the basecluster to sequentially read the data records, sorts the information obtained fromthe data records, and builds the alternate index records:1. The base cluster is opened for read-only processing. To prevent other usersfrom updating the base cluster’s records during BLDINDEX processing, includethe DISP=OLD parameter in the base cluster’s DD statement. If INDATASET isspecified, access method services dynamically allocates the base cluster withDISP=OLD.2. The base cluster’s data records are read and information is extracted to formthe key-pointer pair:vvWhen the base cluster is entry-sequenced, the alternate key value and thedata record’s RBA form the key-pointer pair.When the base cluster is key-sequenced, the alternate key value and the datarecord’s prime key value form the key-pointer pair.94 z/OS V1R6.0 DFSMS Access Method Services for Catalogs
BLDINDEXIf the base cluster’s data records can span control intervals the alternate keymust be in the record’s first control interval.3. The key-pointer pairs are sorted in ascending alternate key order. If yourprogram provides enough virtual storage, access method services does aninternal sort. (The sorting of key-pointer pairs takes place entirely withinvirtual storage.)Use the following process to determine the amount of virtual storage requiredto sort the records internally:a. Sort record length = alternate key length + (prime key length (for akey-sequenced data set) or 4 (for an entry-sequenced data set)).b. Record sort area size = either the sort record length times the number ofrecords in the base cluster rounded up to the next integer multiple of 2048(the next 2K boundary), or a minimum of 32768, whichever is greater.c. Sort table size = (record sort area size/sort record length) x 4.d. The sum of b + c = required amount of virtual storage for an internal sort.(The amount for an internal sort is in addition to the normal storagerequirements for processing an access method services command.)If you do not provide enough virtual storage for an internal sort, or if youspecify the EXTERNALSORT parameter, access method services defines anduses two sort work files and sorts the key-pointer pairs externally. Accessmethod services uses the sort work files to contain most of the key-pointerpairs while it sorts some of them in virtual storage. An external sort work fileis a VSAM entry-sequenced cluster, marked reusable. The minimum amount ofvirtual storage you need for an external sort is:v 32768 + ((32768/sort record length) x 4)The amount of space that access method services requests when defining eachsort work file is calculated as follows:a. Sort records per block = 2041/sort record lengthb. Primary space allocation in records = (number of records in basecluster/sort records per block) + 10c. Secondary space allocation in records = (primary space allocation x 0.10) +10Both primary and secondary space allocation are requested in records with afixed-length record size of 2041 bytes. The control interval size is 2048 bytes.There must be enough space on a single DASD volume to satisfy the primaryallocation request; if there is not, the request fails. To correct the problem,specify the volume serial of a device that has sufficient space (see “DDStatements That Describe the Sort Work Files” on page 96).4. When the key-pointer pairs are sorted into ascending alternate key order, accessmethod services builds an alternate index record for each key-pointer pair. Ifthe NONUNIQUEKEY attribute is used and more than one key-pointer pairhas the same alternate key values, the alternate index record contains thealternate key value, followed by the pointer values in ascending order. If theUNIQUEKEY attribute is used, each alternate key value must be unique.When the record is built, it is written into the alternate index as though it is adata record loaded into a key-sequenced data set. The record’s attributes andvalues, specified when the alternate index is defined, include:BUFFERSPACECONTROLINTERVALSIZEDATACLASSFREESPACERECORDSIZEChapter 8. BLDINDEX 95
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z/OSDFSMS Access Method Services fo
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ContentsFigures . . . . . . . . . .
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Examine Both Components of a Key-Se
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Authorized Program Facility (APF) .
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xz/OS V1R6.0 DFSMS Access Method Se
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xiiz/OS V1R6.0 DFSMS Access Method
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Accessing z/OS DFSMS documents on t
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UNDERSCORED UPPERCASE BOLDFACEUnder
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vvvvWhen the subparameter contains
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owneridcan contain 1 to 8 EBCDIC ch
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xxiiz/OS V1R6.0 DFSMS Access Method
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xxivz/OS V1R6.0 DFSMS Access Method
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GUARANTEED SPACE=YES in the storage
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JCL DD Statement for a Target Data
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From a Time Sharing Option SessionY
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ALTER LIBRARYENTRYLets you alter al
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The multilevel alias facility enhan
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If this is a generic delete, the or
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The multilevel alias facility and t
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16 z/OS V1R6.0 DFSMS Access Method
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IF-THEN-ELSE Command SequenceThe sy
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If you want to indicate a null THEN
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PARM[TEST({[TRACE][AREAS(areaid[ ar
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SYSIN DD *PARM -TEST -(FULL -(ZZCA
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Common Continuation Errors in Codin
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Table 1. Summary of AMS commands (c
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ALLOCATEvvYou can use the LIKE para
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ALLOCATETable 2. Allocate Command P
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ALLOCATEA Automatic record area buf
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ALLOCATE- AVGREC- SPACEv Expiration
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ALLOCATEKEYLEN(bytes)This is the le
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ALLOCATEvvRECFM(F) or RECFM(F B), t
Page 69 and 70: ALLOCATEIf you do not use VOLUME an
Page 71 and 72: ALLOCATEYou cannot use the REUSE pa
Page 73 and 74: ALLOCATE|||||||||||||||||||||||||||
Page 75 and 76: ALLOCATEvvFREESPACE and SHAREOPTION
Page 77 and 78: ALLOCATE//ALLOC JOB ...//STEP1 EXEC
Page 79 and 80: Chapter 5. ALTERThe ALTER command m
Page 81 and 82: ALTERType of Catalog EntryCCSIDECSH
Page 83 and 84: ALTER||Identify a generation data s
Page 85 and 86: ALTERTYPEIMSIf you want to use BWO
Page 87 and 88: ALTERIf FILE is not specified, an a
Page 89 and 90: ALTERLOG(ALL). When you specify LOG
Page 91 and 92: ALTERTable 4. How NEWNAME Resolves
Page 93 and 94: ALTERLOGSTREAMIDWhen you use this,
Page 95 and 96: ALTERSMS-managed volumes, and catal
Page 97 and 98: ALTER||||||||||||||||should manage.
Page 99 and 100: ALTERALTER ExamplesNOUPGRADESpecifi
Page 101 and 102: Alter a Data Set Expiration Date: E
Page 103 and 104: Chapter 6. ALTER LIBRARYENTRYThe AL
Page 105 and 106: ALTER LIBRARYENTRYnumslotsIs the nu
Page 107 and 108: ALTER LIBRARYENTRY||vLIBRARYENTRY a
Page 109 and 110: Chapter 7. ALTER VOLUMEENTRYThe ALT
Page 111 and 112: ALTER VOLUMEENTRYyou use this param
Page 113 and 114: ALTER VOLUMEENTRYcontains commas, s
Page 115 and 116: ALTER VOLUMEENTRYvvvvvVAL0001: Spec
Page 117 and 118: Chapter 8. BLDINDEXThe BLDINDEX com
Page 119: BLDINDEXnames for the work file DD
Page 123 and 124: BLDINDEXAMP='AMORG'Required.BLDINDE
Page 125 and 126: Chapter 9. CREATE LIBRARYENTRYThe C
Page 127 and 128: CREATE LIBRARYENTRY||||||||||||a li
Page 129 and 130: CREATE LIBRARYENTRY|||||/*SCRATCHTH
Page 131 and 132: Chapter 10. CREATE VOLUMEENTRYThe C
Page 133 and 134: CREATE VOLUMEENTRYLIBRARYNAME(libna
Page 135 and 136: CREATE VOLUMEENTRYshelfa 1-to-32 ch
Page 137 and 138: CREATE VOLUMEENTRY//CREATVOL JOB ..
Page 139 and 140: Chapter 11. DCOLLECTThe DFSMS Data
Page 141 and 142: DCOLLECTDCOLLECT ParametersRACF Aut
Page 143 and 144: DCOLLECTMIGRATEDATArequires collect
Page 145 and 146: DCOLLECTFor example, you might use
Page 147 and 148: DCOLLECTvvMIGRATEDATA creates data
Page 149 and 150: Chapter 12. DEFINE ALIASThe DEFINE
Page 151 and 152: DEFINE ALIAS//DEFUCALS JOB ...//STE
Page 153 and 154: Chapter 13. DEFINE ALTERNATEINDEXTh
Page 155 and 156: DEFINE ALTERNATEINDEXNAME(entryname
Page 157 and 158: DEFINE ALTERNATEINDEXIf you do not
Page 159 and 160: DEFINE ALTERNATEINDEXDATACLASS para
Page 161 and 162: DEFINE ALTERNATEINDEXWhen you use a
Page 163 and 164: DEFINE ALTERNATEINDEXWhen you use B
Page 165 and 166: DEFINE ALTERNATEINDEXTo ensure data
Page 167 and 168: DEFINE ALTERNATEINDEXWhen UPGRADE i
Page 169 and 170: DEFINE ALTERNATEINDEXv KILOBYTES al
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Chapter 14. DEFINE CLUSTERUsing Acc
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DEFINE CLUSTERTo avoid potential fa
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DEFINE CLUSTERDEFINE RECORDS alloca
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DEFINE CLUSTERvvThe storage group t
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DEFINE CLUSTERThe size of the contr
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DEFINE CLUSTERresident or reserved.
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DEFINE CLUSTERSpace is allocated fo
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DEFINE CLUSTERnames of the manageme
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DEFINE CLUSTERwhere:v MAXLRECL is t
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DEFINE CLUSTERintegrity. VSAM ensur
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DEFINE CLUSTERAbbreviation: NSPNDSP
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Define an SMS-Managed Key-Sequenced
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DEFINE CLUSTERvvvvKEYS shows that t
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DEFINE CLUSTER//SYSIN DD *DEFINE CL
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DEFINE CLUSTERThe first DEFINE CLUS
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Chapter 15. DEFINE GENERATIONDATAGR
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DEFINE GENERATIONDATAGROUP|||||||||
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DEFINE GENERATIONDATAGROUPvvvEMPTY
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Chapter 16. DEFINE NONVSAMUsing Acc
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DEFINE NONVSAMYou can code DEVICETY
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DEFINE NONVSAM||||||||||||||||Catal
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DEFINE NONVSAM/*VOLUMES(VSER02) ) -
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Chapter 17. DEFINE PAGESPACEThe DEF
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Optional ParametersCATALOG(catname)
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DEFINE PAGESPACEThe storage class p
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Define a Page Space in another Cata
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Chapter 18. DEFINE PATHThe DEFINE P
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DEFINE PATH||||||||||||||||TO(date)
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Chapter 19. DEFINE USERCATALOGThe D
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DEFINE USERCATALOGspace. You can sp
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DEFINE USERCATALOGAbbreviation: BFN
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DEFINE USERCATALOGWhen no FREESPACE
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DEFINE USERCATALOGSHAREOPTIONS(cros
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DEFINE USERCATALOGData and Index Co
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DEFINE USERCATALOGvclass named SPEC
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DEFINE USERCATALOGvCATALOG specifie
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Chapter 20. DELETEThe DELETE comman
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DELETECLUSTERspecifies that the obj
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DELETETo delete a user catalog when
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DELETEallocate the entry name. Dyna
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DELETERECOVERY|NORECOVERYspecifies
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DELETEremoved has no data sets in t
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Delete a Non-VSAM Data Set’s Entr
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Delete a User Catalog: Example 8In
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DELETEThe second DELETE command rem
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Delete an OAM Collection Name Catal
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Chapter 21. DIAGNOSEThe DIAGNOSE co
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DIAGNOSECOMPAREDS(dsname [ dsname..
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DIAGNOSEJob control language statem
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DIAGNOSE/*DIAGNOSE -VVDS -INFILE(DI
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Chapter 22. EXAMINEThe EXAMINE comm
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EXAMINE//EXAMEX2 JOB//STEP1 EXEC PG
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Chapter 23. EXPORTThe EXPORT comman
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EXPORTDuring CIMODE processing, dat
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EXPORTEXPORT ExamplesAbbreviation:
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Export an Entry-Sequenced Cluster:
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Chapter 24. EXPORT DISCONNECTThe EX
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Chapter 25. IMPORTThe IMPORT comman
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IMPORTOUTFILE(ddname)specifies the
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IMPORTdata set. If the define of an
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IMPORTvvvIf VOLUMES is specified wi
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Import a Cluster Utilizing SMS Keyw
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IMPORTmethod services then redefine
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IMPORTvCATALOG identifies the catal
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Chapter 26. IMPORT CONNECTThe IMPOR
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IMPORT CONNECTvvCONNECT specifies t
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Chapter 27. LISTCATThe LISTCAT comm
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LISTCATINDEXspecifies that entries
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LISTCATAbbreviation: LVLExamples of
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LISTCATLISTCAT ExamplesAbbreviation
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LISTCATList Catalog Entries: Exampl
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|||||||||||||||||Chapter 28. LISTDA
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LISTDATA|||||||||||||||||||||||||||
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LISTDATA|||||||||||||||||||||||||||
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LISTDATA||||||||||||||||||vFILE, wh
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Chapter 29. PRINTThe PRINT command
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PRINTkeys (that is, a portion of th
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PRINTAbbreviation: NODCKTOKEY(key)|
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PRINTIDCAMS SYSTEM SERVICES TIME: 1
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PRINTvCOUNT specifies that 15 recor
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Chapter 30. REPROThe REPRO command
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REPROdisposition of OLD. You can co
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REPRONone of these parameters can b
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REPROThe merge operation can be res
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REPRONOREUSEspecifies that records
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REPROThis section lists and describ
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REPROthe name the key is known by o
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REPROJob control language statement
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Merge Selected Entries (Split) from
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REPROassumed that the input data se
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REPROvvvvvINFILE points to the CRYP
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|||||||||||||||||||||||||||||||||||
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SETCACHE|||||||||||||||||||||||||||
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SETCACHE|||||||||||||||||||||||||||
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SETCACHE|||||||||||||||||||||||||||
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SETCACHE||||vafter SETCACHE SUBSYST
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SETCACHE|||||||||||||||||||||||||||
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Chapter 32. SHCDSUse the SHCDS comm
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SHCDS|vvvRemoving the SMSVSAM serve
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SHCDSLISTRECOVERY(base-cluster)list
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SHCDS||||||||||||||||||||||||||||||
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SHCDSSCHDS Examplespossible for dat
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Chapter 33. VERIFYThe VERIFY comman
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Appendix A. Security Authorization
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Security AuthorizationsTable 6. Req
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Security AuthorizationsTable 10. Re
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Appendix B. Interpreting LISTCAT Ou
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LISTCAT OutputRLS IN USEVSAM QUIESC
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LISTCAT OutputSPLITS-CI (STA)SPANNE
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LISTCAT OutputVOLSER (VLS)VOLUME (V
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LISTCAT OutputHISTORY (HIS)RELEASE
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LISTCAT OutputEntries are identifie
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LISTCAT OutputNOTRKOVFL—The physi
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LISTCAT Outputentryname—The name
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LISTCAT Output||set. When using com
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LISTCAT OutputEXTENT-NUMBER—The n
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LISTCAT Output// VOL=SER=TAPE10,LAB
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LISTCAT OutputLISTCAT Output Listin
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LISTCAT OutputLISTCAT -LEVEL(USER)
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LISTCAT OutputDATA ---------- USER.
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LISTCAT OutputALLOCATIONSPACE-TYPE-
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LISTCAT OutputAIX ----------- USER.
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LISTCAT OutputSTATISTICSREC-TOTAL--
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LISTCAT OutputCLUSTER ------- USER.
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LISTCAT OutputALLOCATIONSPACE-TYPE-
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LISTCAT OutputLISTCAT LEVEL(ZTAMS00
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LISTCAT OutputPATH ---------- USER.
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LISTCAT OutputLISTCAT HISTORY Outpu
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LISTCAT OutputNONVSAM ------- USER.
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LISTCAT OutputWhen the LISTCAT EXPI
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LISTCAT OutputFor LISTCAT VOLUME, a
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Appendix C. Interpreting SHCDS Outp
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SHCDS OutputvvIs not in NON-RLS UPD
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SHCDS OutputSHCDS LISTDS(SYSPLEX.KS
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SHCDS OutputLISTSUBSYSDSThe followi
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SHCDS OutputSHCDS LISTSUBSYSDS(ALL)
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Appendix D. Invoking Access Method
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Invoking from ProgramLOAD and CALL
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Invoking from ProgramARGUMENT LISTO
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Invoking from ProgramEntry and exit
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Invoking from ProgramFigure 32. Arg
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Appendix E. DCOLLECT User ExitUser
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DCOLLECT User ExitIDCDCX1 TITLE ’
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***********************************
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Appendix F. Interpreting DCOLLECT O
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DCOLLECT OutputTable 14. DCOLLECT O
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DCOLLECT OutputTable 15. DCOLLECT D
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DCOLLECT OutputTable 15. DCOLLECT D
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DCOLLECT OutputTable 16. DCOLLECT S
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DCOLLECT OutputTable 17. DCOLLECT M
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DCOLLECT OutputTable 17. DCOLLECT M
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DCOLLECT OutputTable 19. DCOLLECT S
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DCOLLECT OutputTable 20. DCOLLECT B
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DCOLLECT OutputTable 25. DCOLLECT A
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DCOLLECT OutputDCDFLAG2DCDFLAG3DCDD
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DCOLLECT OutputDCDLBKDT The system
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DCOLLECT OutputDCAHURBADCAHARBAThe
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DCOLLECT OutputDCVFRAGIDCVLGEXTDCVF
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DCOLLECT OutputDDCCNTLDDCRETPDDDCVO
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DCOLLECT OutputDDCKOFFDDCCOMPDDCMED
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DCOLLECT Outputmajority of I/O sche
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DCOLLECT OutputDMCRLFDMCGDGFLDMCPEL
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DCOLLECT OutputDMCBKFLGDMCBKFQDMCBK
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DCOLLECT OutputDMCTSLUDMCPERDDMCVSC
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DCOLLECT OutputDBCDUNITDBCSRSTDBCST
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DCOLLECT OutputDSGNMFLDDSGUSERDSGDA
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DCOLLECT OutputDSGABSYSDSGADSYSDSGA
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DCOLLECT OutputDSGOLIBSDSGSSTATThes
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DCOLLECT OutputDDRNSTAT (8)This fie
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DCOLLECT OutputDLBDCLENDLBDCLNMDLBD
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DCOLLECT OutputUBDSNAMUBINCATUBNOEN
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DCOLLECT OutputUCLEVEL Identifies t
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DCOLLECT OutputUTPARTUTEMPTYContain
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Appendix G. AccessibilityUsing assi
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NoticesThis information was develop
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GlossaryThis glossary defines techn
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uffer. A routine or storage used to
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DFSMS environment. An environment t
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programs, it provides a means of ge
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PDSE.See partitioned data set exten
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cache), primary storage (DASD conta
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VVCR.VVDS.See VSAM volume control r
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IndexAaccess method services 83attr
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COMPACTION parameterALTER VOLUMEENT
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entryname subparameter (continued)V
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LIBDEVTYPE parameter (continued)CRE
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NUMBERED parameterDEFINE commandCLU
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security authorization (continued)l
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WRITECHECK parameter (continued)DEF
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Readers’ Comments — We’d Like
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Program Number: 5694-A01Printed in
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