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

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4.52 z/OS Network File System (z/OS NFS) AIX UNIX Sun Solaris HP/UX (z/OS NFS) Other NFS Client and Servers Figure 4-63 DFSMS Network File System z/OS Network File System (z/OS NFS) The z/OS Network File System is a distributed file system that enables users to access UNIX files and directories that are located on remote computers as though they were local. NFS is independent of machine types, operating systems, and network architectures. Use the NFS for file serving (as a data repository) and file sharing between platforms supported by z/OS. Clients and servers A client is a computer or process that requests services in the network. A server is a computer or process that responds to a request for service from a client. A user accesses a service, which allows the use of data or other resources. Figure 4-63 illustrates the client-server relationship: ► The upper center portion shows the DFSMS NFS address space server; the lower portion shows the DFSMS NFS address space client. ► The left side of the figure shows various NFS clients and servers that can interact with the DFSMS NFS server and client. ► In the center of the figure is the Transmission Control Protocol/Internet Protocol (TCP/IP) network used to communicate between clients and servers. With the NFS server, you can remotely access z/OS conventional data sets or z/OS UNIX files from workstations, personal computers, and other systems that run client software for the 192 ABCs of z/OS System Programming Volume 3 TCP/IP Network z/OS DFSMS NETWORK FILE SYSTEM SERVER z/OS DFSMS NETWORK FILE SYSTEM CLIENT AMS OMVS MVS Data Sets Hierarchical File System
Sun NFS version 2 protocols, the Sun NFS version 3 protocols, and the WebNFS protocols over TCP/IP network. The z/OS NFS server acts as an intermediary to read, write, create, or delete z/OS UNIX files and MVS data sets that are maintained on an MVS host system. The remote MVS data sets or z/OS UNIX files are mounted from the host processor to appear as local directories and files on the client system. This server makes the strengths of a z/OS host processor—storage management, high-performance disk storage, security, and centralized data—available to the client platforms. With the NFS client you can allow basic sequential access method (BSAM), queued sequential access method (QSAM), virtual storage access method (VSAM), and z/OS UNIX users and applications transparent access to data on systems that support the Sun NFS version 2 protocols and the Sun NFS version 3 protocols. The Network File System can be used for: ► File sharing between platforms ► File serving (as a data repository) Supported clients for the NFS server The z/OS NFS client supports all servers that implement the server portion of the Sun NFS Version 2 and Version 3 protocols. The z/OS NFS client does not support NFS version 4. Tested clients for the z/OS NFS server, using the NFS version 4 protocol, are: ► IBM RS/6000® AIX version 5.3 ► Sun Solaris version 10 ► Enterprise Linux® 4 ► Windows® 2000/XP with Hummingbird Maestro 9 and Maestro 10 Other client platforms should work as well because NFS version 4 is an industry standard protocol, but they have not been tested by IBM. NFS client software for other IBM platforms is available from other vendors. You can also access the NFS server from non-IBM clients that use the NFS version 2 or version 3 protocol, including: ► DEC stations running DEC ULTRIX version 4.4 ► HP 9000 workstations running HP/UX version 10.20 ► Sun PC-NFS version 5 ► Sun workstations running SunOS or Sun Solaris versions 2.5.3 For further information about NFS, refer to z/OS Network File System Guide and Reference, SC26-7417, and visit: http://www-1.ibm.com/servers/eserver/zseries/zos/nfs/ Chapter 4. Storage management software 193
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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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Page 160 and 161: 4.23 PDS data set organization Adva
Page 162 and 163: 4.24 Partitioned data set extended
Page 164 and 165: 4.25 PDSE enhancements PDSE, two ad
Page 166 and 167: 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
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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
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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
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Page 216 and 217: When to use logical processing Use
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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 240 and 241: value of a user-specified RETPD or
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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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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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