ABCs of z/OS System Programming Volume 3 - IBM Redbooks

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Note: When you delete a data set, the BCS, VVDS, and VTOC entries for the data set are removed. If you later recover a BCS, there can be BCS entries for data sets which have been deleted. In this case, the data sets do not exist, and there are no entries for them in the VVDS or VTOC. To clean up the BCS, delete the BCS entries. Delete aliases To simply delete an alias, use the IDCAMS DELETE ALIAS command, specifying the alias you are deleting. To delete all the aliases for a catalog, use EXPORT DISCONNECT to disconnect the catalog. The aliases are deleted when the catalog is disconnected. When you again connect the catalog (using IMPORT CONNECT), the aliases remain deleted. Delete the catalog entry To only delete a catalog entry, you can use the DELETE NOSCRATCH command; the VVDS and VTOC entries are not deleted. The entry deleted can be reinstated with the DEFINE RECATALOG command, as shown in Figure 6-19. //DELDS JOB ... //STEP1 EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=A //SYSIN DD * DELETE TEST1.A NOSCRATCH /* deletes TEST1.A from the BCS */ DEFINE NONVSAM - /* redefines TEST1.A into the BCS */ (NAME(TEST1.A) - DEVICETYPE(3390)- VOLUMES(VSF6S3) - RECATALOG - ) /* Figure 6-19 Delete NOSCRATCH, define RECATALOG Delete VVR or NVR records When the catalog entry is missing, and the data set remains on the DASD, you can use the DELETE VVR for VSAM data sets and DELETE NVR for non-VSAM SMS-managed data sets to remove its entry from the VVDS. You can only use these commands if there is no entry in the BCS for the data set. //DELDS JOB ... //S1 EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=* //DD1 DD VOL=SER=VSF6S3,UNIT=3390,DISP=OLD //SYSIN DD * DELETE TEST1.A - FILE(DD1) - NVR /* Figure 6-20 Delete the VVDS entry for a non-VSAM data set Important: When deleting VSAM KSDS, you must issue a DELETE VVR for each of the components, the DATA, and the INDEX. 348 ABCs of z/OS System Programming Volume 3
Delete generation data groups In this example, a generation data group (GDG) base catalog entry is deleted from the catalog. The generation data sets associated with GDGBASE remain unaffected in the VTOC, as shown in Figure 6-21. //DELGDG JOB ... //S1 EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=* //SYSIN DD * DELETE TEST1.GDG - GENERATIONDATAGROUP - RECOVERY /* Figure 6-21 Delete a GDG base for recovery The DELETE command with keyword RECOVERY removes the GDG base catalog entry from the catalog. Delete an ICF When deleting an ICF, take care to specify whether you want to delete only the catalog, or if you want to delete all associated data. The following examples show how to delete a catalog. ► Delete with recovery In Figure 6-22, a user catalog is deleted in preparation for replacing it with an imported backup copy. The VVDS and VTOC entries for objects defined in the catalog are not deleted and the data sets are not scratched, as shown in the JCL. //DELET13 JOB ... //STEP1 EXEC PGM=IDCAMS //DD1 DD VOL=SER=VSER01,UNIT=3390,DISP=OLD //SYSPRINT DD SYSOUT=A //SYSIN DD * DELETE - USER.CATALOG - FILE(DD1) - RECOVERY - USERCATALOG /* Figure 6-22 Delete a user catalog for recovery RECOVERY specifies that only the catalog data set is deleted, without deleting the objects defined in the catalog. ► Delete an empty user catalog In Figure 6-23 on page 350, a user catalog is deleted. A user catalog can be deleted when it is empty; that is, when there are no objects cataloged in it other than the catalog's volume. If the catalog is not empty, it cannot be deleted unless the FORCE parameter is specified. Chapter 6. Catalogs 349
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ibm.com/redbooks Front cover ABCs o
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Note: Before using this information
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3.10 Data sets eligible for EAV vol
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5.5 Implementing SMS policies. . .
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7.29 Accessing a data set with DFSM
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Trademarks IBM, the IBM logo, and i
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Paul Rogers is a Consulting IT Spec
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xiv ABCs of z/OS System Programming
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1.1 Introduction to DFSMS IBM 3494
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Network File System The Network Fil
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Using access methods, commands, and
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Distributed data management DFSMSds
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Shelf management DFSMSrmm groups in
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Availability management DFSMShsm ba
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key functions that enable multiple
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An access method is a DFSMSdfp comp
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including the operating system itse
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2.3 DFSMSdfp data set types Data se
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2.4 Types of VSAM data sets Types o
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Partitioned data set (PDS) Partitio
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► Extended-addressability, which
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method writes data on the first vol
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SMS calculates the average preferen
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Restriction: The following types of
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► REXX LISTDSI function ► CLIST
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Using CLIST OPENFILE INPUT/GETFILE
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2.12 z/OS UNIX files Following are
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Logical records and blocks To an ap
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2.14 Locating an existing data set
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2.15 Uncataloged and cataloged data
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2.17 VTOC and DSCBs VTOC DSCBs Figu
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2.18 VTOC index structure VOLUME LA
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2.19 Initializing a volume using IC
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52 ABCs of z/OS System Programming
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3.1 Traditional DASD capacity 885 C
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Large volume support design conside
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DASD virtual visibility Traditional
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3.4 WLM controlling PAVs zSeries WL
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3.5 Parallel Access Volumes (PAVs)
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3.6 HyperPAV feature for DS8000 ser
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For each z/OS image within the sysp
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Note: With the 3390 Model A, the mo
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Note the following points regarding
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EAS non-eligible data sets An EAS-i
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same as for previous 3390 model dev
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3.13 Using dynamic volume expansion
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3.15 Using Web browser GUI Need a U
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3.17 Increase capacity of volumes F
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3.19 Final capacity increase for vo
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VTOC index changes The index block
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The documentation is in Device Supp
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free space available following the
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Note: The refresh of the index occu
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Updating the VTOC following volume
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USEEAV(YES|NO) YES This means that
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Generally, for VSAM data set alloca
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attributes can reside in the extend
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Other methods for EATTR specificati
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3.30 Migration assistance tracker T
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3.31 Migration tracker commands SET
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4.1 Overview of DFSMSdfp utilities
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4.2 IEBCOMPR utility Example 1 Exam
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4.3 IEBCOPY utility //COPY JOB ...
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4.4 IEBCOPY: Copy operation DATA.SE
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4.5 IEBCOPY: Compress operation DAT
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Copying to z/OS UNIX IEBGENER can b
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4.8 IEBGENER: Copying data to tape
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4.10 IEHLIST LISTVTOC output CONTEN
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Examples of IEHINITT In the example
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4.13 DFSMSdfp access methods DFSMSd
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physical blocks. QSAM also guarante
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The automatic class selection (ACS)
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Command Functions DEFINE PAGESPACE
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Note: These commands cannot be used
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► Capacity planning: Capacity pla
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A GDS has sequentially ordered abso
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The parameters are: NAME This speci
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4.21 Relative generation numbers A.
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4.23 PDS data set organization Adva
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4.24 Partitioned data set extended
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4.25 PDSE enhancements PDSE, two ad
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4.26 PDSE: Conversion Using DFSMSds
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4.27 Program objects in a PDSE Func
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4.28 Sequential access methods Sequ
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4.29 z/OS V1R9 QSAM - BSAM enhancem
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4.30 Virtual storage access method
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4.31 VSAM terminology Logical recor
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4.32 VSAM: Control interval (CI) LR
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4.33 VSAM data set components Clust
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4.34 VSAM key sequenced cluster (KS
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The sequence is as follows: 1. VSAM
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4.37 VSAM: Typical ESDS processing
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4.39 VSAM: Typical RRDS processing
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4.41 VSAM: Data-in-virtual (DIV) DI
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4.43 VSAM resource pool VSAM resour
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► CIs are discarded as soon as th
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SMB processing techniques If all of
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MSG=SMBBIAS When you specify MSG =
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4.47 VSAM SMB enhancement with z/OS
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4.48 VSAM enhancements Data compres
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4.50 Data set separation syntax Dat
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4.51 Data facility sort (DFSORT) Pa
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4.52 z/OS Network File System (z/OS
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4.53 DFSMS optimizer (DFSMSopt) Fig
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4.54 Data Set Services (DFSMSdss) /
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4.55 DFSMSdss: Physical and logical
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When to use logical processing Use
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When to use physical processing Use
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4.59 Hierarchical Storage Manager (
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Tasks for availability management f
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- Release of unused, over-allocated
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usually slower response time. Usual
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DATASSETSIZE(dssize) This specifies
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► Utilize OVERFLOW volumes for mi
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Before automatic secondary space ma
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For data sets larger than 58 K trac
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► Migration level 1 (ML1) volumes
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value of a user-specified RETPD or
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The second-newest version is treate
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If the version has a specified rete
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ACS routines For both automatic and
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- System-managed automated tape lib
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4.75 What DFSMSrmm can manage Remov
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You can also use the DFSMSrmm built
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z/OS V1R8 enhancements DFSMSrmm hel
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5.1 Storage management ISMF dss Fig
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5.3 Goals and benefits of system-ma
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Improved data availability manageme
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► Whether data sets are to be kep
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When the ACS routines are started a
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5.7 Assigning data to be system-man
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Even though data class is optional,
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You can use the ACCESSIBILITY attri
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If you do not explicitly assign a m
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5.12 Using storage groups DFSMShsm-
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5.13 Using aggregate backup and rec
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5.14 Automatic Class Selection (ACS
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5.15 SMS configuration An SMS confi
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5.16 SMS control data sets SMS Figu
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5.17 Implementing DFSMS Enabling th
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► Gain experience with the operat
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Specify SHAREOPTIONS(3,3) for the A
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Defining the SMS base configuration
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5.21 Creating ACS routines Storage
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5.22 DFSMS setup for z/OS IEASYSxx
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5.23 Starting SMS and activating a
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5.24 Control SMS processing with op
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5.25 Displaying the SMS configurati
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exception. If it is clear that a PD
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sets (see Figure 5-27 on page 287).
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Using a high level qualifier (HLQ)
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5.30 Establishing installation stan
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5.32 Data class attributes Data cla
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5.34 Simplifying JCL use Figure 5-3
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Page 322 and 323: Production batch refers to data cre
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Page 326 and 327: 5.44 ISMF: Product relationships IS
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Page 342 and 343: 6.1 Catalogs ICF structure 1 ICF st
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Page 346 and 347: 6.3 The VSAM volume data set (VVDS)
Page 348 and 349: 6.4 Catalogs by function SYSCAT VOL
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Page 358 and 359: 6.8 Using multiple catalogs CATALOG
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Page 366 and 367: DELET6 JOB ... //STEP1 EXEC PGM=IDC
Page 368 and 369: Note: The command will result in er
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Page 380 and 381: 5. Use REPRO MERGECAT to split the
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Page 384 and 385: Catalog report output This MODIFY c
Page 386 and 387: Restarting the catalog address spac
Page 388 and 389: ► MODIFY CATALOG,LIST The LIST co
Page 390 and 391: Recover from performance slow downs
Page 392 and 393: 2. Define or alter your existing ca
Page 394 and 395: 7.1 VSAM share options Share option
Page 396 and 397: 7.2 Base VSAM buffering Three types
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Page 400 and 401: 7.5 VSAM record-level sharing intro
Page 402 and 403: ► Non-CICS jobs can have read-onl
Page 404 and 405: 7.8 Buffering under VSAM RLS CICS R
Page 406 and 407: 7.9 VSAM RLS locking control interv
Page 408 and 409: 7.10 VSAM RLS/CICS data set recover
Page 410 and 411: 7.11 Transactional recovery Commite
Page 412 and 413: 7.13 VSAM RLS implementation Update
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Cache structures Coupling Facility
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7.15 Update PARMLIB with VSAM RLS p
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7.16 Define sharing control data se
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Tip: Place the SHCDSs on separate v
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Command ===> Figure 7-22 CF cache u
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7.18 Update data sets with log para
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7.19 The SMSVSAM address space RLS
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7.20 Interacting with VSAM RLS Inte
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To learn about other DISPLAY comman
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to use this specification or the sp
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► RECOVERY REQUIRED This field in
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DFSMStvs is a follow-on project/cap
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Like CICS, DFSMStvs does not perfor
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It is RRS that provides the means t
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7.27 Unit of work and unit of recov
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► Log of logs (optional, shared w
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7.30 Application considerations Bre
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7.31 DFSMStvs logging implementatio
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LABEL JOB ... //STEP10 EXEC PGM=IXC
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7.33 Update PARMLIB with DFSMStvs p
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7.34 The DFSMStvs instance CICSA R/
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Changes to parameters other than AK
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7.36 Summary Figure 7-48 Summary Ba
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8.1 Overview of DASD types Traditio
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8.2 Redundant array of independent
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8.3 Seascape architecture Powerful
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► Data copy sharing Data copy sha
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NVS cache NVS is used to store a se
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8.6 ESS major components Figure 8-6
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8.8 FICON host adapters FICON host
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8.9 ESS disks Eight-packs Set of 8
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8.10 ESS device adapters SSA 160 De
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8.11 SSA loops SSA operation 4 link
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8.12 RAID-10 RAID-10 configurations
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8.13 Storage balancing with RAID-10
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Peer-to-peer remote copy (PPRC) PPR
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8.15 ESS performance features Prior
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8.16 IBM TotalStorage DS6000 Enterp
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DS6000 expansion enclosure (Model 1
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support for one or two expansion fr
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The DS8300 models can support eithe
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consolidations where separate stora
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Copy Services include the following
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TotalStorage Expert helps storage a
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identifying the data set and descri
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Table 8-4 Types of labels Code Mean
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equired. Therefore, the resulting t
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Drive designed for automation solut
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3494 models and features IBM 3494 o
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Each FICON channel in the VTS can s
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In addition to the 3494 VTS compone
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► Consolidation Another benefit i
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Online resources ► z/OS DFSMShsm
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