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

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The documentation is in Device Support Facilities (ICKDSF) User's Guide and Reference Release 17, GC35-0033. ICKDSF to build a VTOC After the expansion of the volume operation completes, you need to use the ICKDSF REFORMAT REFVTOC command, shown in Figure 3-22, to adjust the volume VTOC to reflect the additional cylinders. Note that the capacity of a volume cannot be decreased. //INIT EXEC PGM=ICKDSF,PARM='NOREPLYU' //IN1 DD UNIT=3390,VOL=SER=ITSO02,DISP=SHR //SYSPRINT DD SYSOUT=* //SYSIN DD * REFORMAT DDNAME(IN1) VERIFY(ITSO02) REFVTOC /* Figure 3-22 Build a new VTOC 86 ABCs of z/OS System Programming Volume 3
3.22 Update VTOC after volume expansion REFORMAT command must be used to rebuild the VTOC and index structures after a volume has been expanded - (Method used with V1R10) The command updates portions of a previously initialized volume You can also enter ICKDSF commands with ISMF If an index exists when you expand the VTOC, it must be deleted and rebuilt to reflect the VTOC changes Parameters for index total track size rebuild EXTINDEX(n) XINDEX(n) Figure 3-23 Create a new VTOC after volume expansion New VTOC after expansion To prepare a volume for activity by initializing it, use the Device Support Facilities (ICKDSF) utility to build the VTOC. You can create a VTOC index when initializing a volume by using the ICKDSF INIT command and specifying the INDEX keyword. To convert a non-indexed VTOC to an indexed VTOC, use the BUILDIX command with the IXVTOC keyword. The reverse operation can be performed by using the BUILDIX command and specifying the OSVTOC keyword. Parameters for index rebuild To refresh a volume VTOC and INDEX in its current format, use the ICKDSF command REFORMAT with the RVTOC keyword. To optionally extend the VTOC and INDEX, use the ICKDSF command REFORMAT with the EXTVTOC and EXTINDEX keywords. Run REFORMAT NEWVTOC(cc,hh,n|ANY,n) to expand the VTOC. The new VTOC will be allocated on the beginning location cc,hh with total size of n tracks. Overlay between the new and old VTOC is not allowed. If cc,hh is omitted, ICKDSF will locate the new VTOC at the first eligible location on the volume other than at the location of the old VTOC where free space with n tracks is found. n must be greater than the old VTOC size. The volume must be offline to use the NEWVTOC parameter. Run REFORMAT EXTVTOC(n) where n is the total size of the new VTOC in tracks. There must be free space available to allow for contiguous expansion of the VTOC. If there is no Chapter 3. Extended access volumes 87
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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
Page 52 and 53: Using CLIST OPENFILE INPUT/GETFILE
Page 54 and 55: 2.12 z/OS UNIX files Following are
Page 56 and 57: Logical records and blocks To an ap
Page 58 and 59: 2.14 Locating an existing data set
Page 60 and 61: 2.15 Uncataloged and cataloged data
Page 62 and 63: 2.17 VTOC and DSCBs VTOC DSCBs Figu
Page 64 and 65: 2.18 VTOC index structure VOLUME LA
Page 66 and 67: 2.19 Initializing a volume using IC
Page 68 and 69: 52 ABCs of z/OS System Programming
Page 70 and 71: 3.1 Traditional DASD capacity 885 C
Page 72 and 73: Large volume support design conside
Page 74 and 75: DASD virtual visibility Traditional
Page 76 and 77: 3.4 WLM controlling PAVs zSeries WL
Page 78 and 79: 3.5 Parallel Access Volumes (PAVs)
Page 80 and 81: 3.6 HyperPAV feature for DS8000 ser
Page 82 and 83: For each z/OS image within the sysp
Page 84 and 85: Note: With the 3390 Model A, the mo
Page 86 and 87: Note the following points regarding
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Page 90 and 91: same as for previous 3390 model dev
Page 92 and 93: 3.13 Using dynamic volume expansion
Page 94 and 95: 3.15 Using Web browser GUI Need a U
Page 96 and 97: 3.17 Increase capacity of volumes F
Page 98 and 99: 3.19 Final capacity increase for vo
Page 100 and 101: VTOC index changes The index block
Page 104 and 105: free space available following the
Page 106 and 107: Note: The refresh of the index occu
Page 108 and 109: Updating the VTOC following volume
Page 110 and 111: USEEAV(YES|NO) YES This means that
Page 112 and 113: Generally, for VSAM data set alloca
Page 114 and 115: attributes can reside in the extend
Page 116 and 117: Other methods for EATTR specificati
Page 118 and 119: 3.30 Migration assistance tracker T
Page 120 and 121: 3.31 Migration tracker commands SET
Page 122 and 123: 106 ABCs of z/OS System Programming
Page 124 and 125: 4.1 Overview of DFSMSdfp utilities
Page 126 and 127: 4.2 IEBCOMPR utility Example 1 Exam
Page 128 and 129: 4.3 IEBCOPY utility //COPY JOB ...
Page 130 and 131: 4.4 IEBCOPY: Copy operation DATA.SE
Page 132 and 133: 4.5 IEBCOPY: Compress operation DAT
Page 134 and 135: Copying to z/OS UNIX IEBGENER can b
Page 136 and 137: 4.8 IEBGENER: Copying data to tape
Page 138 and 139: 4.10 IEHLIST LISTVTOC output CONTEN
Page 140 and 141: Examples of IEHINITT In the example
Page 142 and 143: 4.13 DFSMSdfp access methods DFSMSd
Page 144 and 145: physical blocks. QSAM also guarante
Page 146 and 147: The automatic class selection (ACS)
Page 148 and 149: Command Functions DEFINE PAGESPACE
Page 150 and 151: 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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222 ABCs of z/OS System Programming
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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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► The AVGREC attribute indicates
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Considerations when specifying spac
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5.38 SMS PDSE support SMS PDSE supp
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5.40 Allocating new PDSEs //ALLOC E
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Production batch refers to data cre
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tape are stored as a tape data set
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5.44 ISMF: Product relationships IS
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5.45 ISMF: What you can do with ISM
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5.46 ISMF: Accessing ISMF Panel Hel
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5.48 ISMF: Obtaining information ab
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5.49 ISMF: Data set option Figure 5
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5.51 ISMF: Management Class option
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5.53 ISMF: Storage Class option Fig
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6.1 Catalogs ICF structure 1 ICF st
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6.2 The basic catalog structure (BC
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6.3 The VSAM volume data set (VVDS)
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6.4 Catalogs by function SYSCAT VOL
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User catalogs The difference betwee
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Multilevel aliases You can augment
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Defining a cataloged data set When
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The example in Figure 6-9 on page 3
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6.8 Using multiple catalogs CATALOG
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If you need to share data sets acro
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► List a user catalog connector i
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Note: When you delete a data set, t
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DELET6 JOB ... //STEP1 EXEC PGM=IDC
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Note: The command will result in er
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You can later recover the backup co
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Aliases to the catalog can be defin
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► Physical errors The records on
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Because APF authorization is establ
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3. Use EXAMINE and DIAGNOSE to ensu
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5. Use REPRO MERGECAT to split the
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The two types of buffer are used to
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Catalog report output This MODIFY c
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Restarting the catalog address spac
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► MODIFY CATALOG,LIST The LIST co
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Recover from performance slow downs
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2. Define or alter your existing ca
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7.1 VSAM share options Share option
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7.2 Base VSAM buffering Three types
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7.3 Base VSAM locking Figure 7-3 Ex
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7.5 VSAM record-level sharing intro
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► Non-CICS jobs can have read-onl
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7.8 Buffering under VSAM RLS CICS R
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7.9 VSAM RLS locking control interv
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7.10 VSAM RLS/CICS data set recover
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7.11 Transactional recovery Commite
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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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