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

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equired. Therefore, the resulting tape environment can fully exploit integrated cartridge loaders (ICL), IDRC, and 3490E. Tape mount management also improves job throughput because jobs are no longer queued up on tape drives. Approximately 70% of all tape data sets queued up on drives are less than 10 MB. With tape mount management, these data sets reside on DASD while in use. This frees up the tape drives for other allocations. Tape mount management recommends that you use DFSMShsm to do interval migration to SMS storage groups. You can use ACS routines to redirect your tape data sets to a tape mount management DASD buffer storage group. DFSMShsm scans this buffer on a regular basis and migrates the data sets to migration level 1 DASD or migration level 2 tape as soon as possible, based on the management class and storage group specifications. Table 8-5 lists all IBM tape capacities supported since 1952. Table 8-5 Tape capacity of various IBM products Year Product Capacity (Mb) Transfer Rate (KB/S) 1952 IBM 726 1.4 7.5 1953 IBM 727 5.8 15 1957 IBM 729 23 90 1965 IBM 2401 46 180 1968 IBM 2420 46 320 1973 IBM 3420 180 1,250 1984 IBM 3480 200 3,000 1989 IBM 3490 200 4,500 1991 IBM 3490E 400 9,000 1992 IBM 3490E 800 9,000 1995 IBM 3590 Magstar 10,000 (uncompacted) 9,000 (uncompacted) 1999 IBM 3590E Magstar 20,000 (uncompacted) 14,000 2000 IBM 3590E Magstar XL Cartridge 2003 IBM 3592 TotalStorage Enterprise Tape Drive For further information about tape processing, see z/OS DFSMS Using Magnetic Tapes, SC26-7412. 492 ABCs of z/OS System Programming Volume 3 20,000/40,000 (dependent on Model B or E) 300,000 (for high capacity requirements) or 60,000 (for fast data access requirements) Note: z/OS supports tape devices starting from D/T 3420. 14,000 40,000
8.25 TotalStorage Enterprise Tape Drive 3592 Model J1A The IBM 3592 is an "Enterprise Class" tape drive Data rate 40 MB/s (without compression) Capacity 300 GB per cartridge (without compression) 60 GB format to provide fast access to data Dual ported 2 Gbps Fiber Channel interface Autonegotiates (1 or 2 Gbps, Fabric or loop support) Options may be hard-set at drive Drive designed for automation solutions Small form factor Cartridge similar form factor to 3590 and 3490 Improved environmentals Figure 8-25 TotalStorage Enterprise Tape Drive 3592 Model J1A IBM 3592 tape drive The IBM 3592 tape drive is the fourth generation of high capacity and high performance tape systems. It was announced in September 2003 and connects to IBM eServer zSeries systems by way of the TotalStorage Enterprise Tape Controller 3592 Model J70 using ESCON or FICON links. The 3592 system is the successor of the IBM Magstar 3590 family of tape drives and controller types. The IBM 3592 tape drive can be used as a standalone solution or as an automated solution within a 3494 tape library. Enterprise class tape drive The native rate for data transfer increases up to 40 MBps compared to 14 MBps in a 3590 Magstar. The uncompressed amount of data which fits on a single cartridge increases to 300 GB and is used for scenarios where high capacity is needed. The tape drive has a second option, where you can store a maximum of 60 GB per tape. This option is used whenever fast access to tape data is needed. Dual ported 2 Gbps Fiber Channel interface This tape drive generation connects to the tape controller 3592 Model J70 using Fiber Channel. SCSI connection, as it used in 3590 configuration, is no longer supported. However, if you connect a 3590 Magstar tape drive to a 3592 controller, SCSI connection is possible. Chapter 8. Storage management hardware 493
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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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► 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
Page 458 and 459: 7.36 Summary Figure 7-48 Summary Ba
Page 460 and 461: 444 ABCs of z/OS System Programming
Page 462 and 463: 8.1 Overview of DASD types Traditio
Page 464 and 465: 8.2 Redundant array of independent
Page 466 and 467: 8.3 Seascape architecture Powerful
Page 468 and 469: ► Data copy sharing Data copy sha
Page 470 and 471: NVS cache NVS is used to store a se
Page 472 and 473: 8.6 ESS major components Figure 8-6
Page 474 and 475: 8.8 FICON host adapters FICON host
Page 476 and 477: 8.9 ESS disks Eight-packs Set of 8
Page 478 and 479: 8.10 ESS device adapters SSA 160 De
Page 480 and 481: 8.11 SSA loops SSA operation 4 link
Page 482 and 483: 8.12 RAID-10 RAID-10 configurations
Page 484 and 485: 8.13 Storage balancing with RAID-10
Page 486 and 487: Peer-to-peer remote copy (PPRC) PPR
Page 488 and 489: 8.15 ESS performance features Prior
Page 490 and 491: 8.16 IBM TotalStorage DS6000 Enterp
Page 492 and 493: DS6000 expansion enclosure (Model 1
Page 494 and 495: support for one or two expansion fr
Page 496 and 497: The DS8300 models can support eithe
Page 498 and 499: consolidations where separate stora
Page 500 and 501: Copy Services include the following
Page 502 and 503: TotalStorage Expert helps storage a
Page 504 and 505: identifying the data set and descri
Page 506 and 507: Table 8-4 Types of labels Code Mean
Page 510 and 511: Drive designed for automation solut
Page 512 and 513: 3494 models and features IBM 3494 o
Page 514 and 515: Each FICON channel in the VTS can s
Page 516 and 517: In addition to the 3494 VTS compone
Page 518 and 519: ► Consolidation Another benefit i
Page 520 and 521: Online resources ► z/OS DFSMShsm
Page 522: ABCs of z/OS System Programming Vol
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