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

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When to use physical processing Use physical processing when: ► Backing up system volumes that you might want to restore with a stand-alone DFSMSdss restore operation. Stand-alone DFSMSdss restore supports only physical dump tapes. ► Performance is an issue. Generally, the fastest way (measured by elapsed time) to copy or dump an entire volume is by using a physical full-volume command. This is primarily because minimal catalog searching is necessary for physical processing. ► Substituting one physical volume for another or recovering an entire volume. With a COPY or RESTORE (full volume or track) command, the volume serial number of the input DASD volume can be copied to the output DASD volume. ► Dealing with I/O errors. Physical processing provides the capability to copy, dump, and restore a specific track or range of tracks. ► Dumping or copying between volumes of the same device type but different capacity. 202 ABCs of z/OS System Programming Volume 3
4.58 DFSMSdss stand-alone services DFDSS Stand-Alone Tape Figure 4-69 DFSMSdss stand-alone services DFSMSdss stand-alone services The DFSMSdss stand-alone restore function is a single-purpose program. It is designed to allow the system programmer to restore vital system packs during disaster recovery without relying on an MVS environment. Stand-alone services can perform either a full-volume restore or a tracks restore from dump tapes produced by DFSMSdss or DFDSS and offers the following benefits: ► Provides user-friendly commands to replace the previous control statements ► Supports IBM 3494 and 3495 Tape Libraries, and 3590 Tape Subsystems ► Supports IPLing from a DASD volume, in addition to tape and card readers ► Allows you to predefine the operator console to be used during stand-alone services processing For detailed information about the stand-alone service and other DFSMSdss information, refer to z/OS DFSMSdss Storage Administration Reference, SC35-0424, and z/OS DFSMSdss Storage Administration Guide, SC35-0423, and visit: http://www-1.ibm.com/servers/storage/software/sms/dss/ Chapter 4. Storage management software 203
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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
Page 168 and 169: 4.27 Program objects in a PDSE Func
Page 170 and 171: 4.28 Sequential access methods Sequ
Page 172 and 173: 4.29 z/OS V1R9 QSAM - BSAM enhancem
Page 174 and 175: 4.30 Virtual storage access method
Page 176 and 177: 4.31 VSAM terminology Logical recor
Page 178 and 179: 4.32 VSAM: Control interval (CI) LR
Page 180 and 181: 4.33 VSAM data set components Clust
Page 182 and 183: 4.34 VSAM key sequenced cluster (KS
Page 184 and 185: The sequence is as follows: 1. VSAM
Page 186 and 187: 4.37 VSAM: Typical ESDS processing
Page 188 and 189: 4.39 VSAM: Typical RRDS processing
Page 190 and 191: 4.41 VSAM: Data-in-virtual (DIV) DI
Page 192 and 193: 4.43 VSAM resource pool VSAM resour
Page 194 and 195: ► CIs are discarded as soon as th
Page 196 and 197: SMB processing techniques If all of
Page 198 and 199: MSG=SMBBIAS When you specify MSG =
Page 200 and 201: 4.47 VSAM SMB enhancement with z/OS
Page 202 and 203: 4.48 VSAM enhancements Data compres
Page 204 and 205: 4.50 Data set separation syntax Dat
Page 206 and 207: 4.51 Data facility sort (DFSORT) Pa
Page 208 and 209: 4.52 z/OS Network File System (z/OS
Page 210 and 211: 4.53 DFSMS optimizer (DFSMSopt) Fig
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Page 214 and 215: 4.55 DFSMSdss: Physical and logical
Page 216 and 217: When to use logical processing Use
Page 220 and 221: 4.59 Hierarchical Storage Manager (
Page 222 and 223: Tasks for availability management f
Page 224 and 225: - Release of unused, over-allocated
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Page 230 and 231: ► Utilize OVERFLOW volumes for mi
Page 232 and 233: Before automatic secondary space ma
Page 234 and 235: For data sets larger than 58 K trac
Page 236 and 237: ► Migration level 1 (ML1) volumes
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Page 240 and 241: value of a user-specified RETPD or
Page 242 and 243: The second-newest version is treate
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Page 246 and 247: ACS routines For both automatic and
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Page 250 and 251: 4.75 What DFSMSrmm can manage Remov
Page 252 and 253: You can also use the DFSMSrmm built
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Page 256 and 257: 5.1 Storage management ISMF dss Fig
Page 258 and 259: 5.3 Goals and benefits of system-ma
Page 260 and 261: Improved data availability manageme
Page 262 and 263: ► Whether data sets are to be kep
Page 264 and 265: When the ACS routines are started a
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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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