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DFSMS Object Access Method Planning, Installation, and Storage Administration Guide for Object Support

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DFSMS Object Access Method Planning, Installation, and Storage Administration Guide for Object Support z/OS Version 2 Release 3 DFSMS Object Access Method Planning, Installation, and Storage Administration Guide for Object Support IBM SC23-6866-30 Note Before using this information and the product it supports, read the information in “Notices” on page 597. This edition applies to Version 2 Release 3 of z/OS (5650-ZOS) and to all subsequent releases and modifications until otherwise indicated in new editions. Last updated: 2019-06-24 © Copyright International Business Machines Corporation 1986, 2019. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Figures................................................................................................................. xi Tables..................................................................................................................xv About This Document..........................................................................................xix Required product knowledge.................................................................................................................... xix z/OS information........................................................................................................................................xix How to Read Syntax Diagrams.................................................................................................................. xix How to send your comments to IBM................................................................... xxiii If you have a technical problem.............................................................................................................. xxiii Summary of changes.......................................................................................... xxv Summary of changes for z/OS Version 2 Release 3.................................................................................xxv Summary of changes for z/OS Version 2 Release 2...............................................................................xxvii Summary of changes for z/OS Version 2 Release 1.............................................................................. xxviii z/OS Version 2 Release 1 summary of changes.............................................................................. xxviii Chapter 1. Understanding the Object Access Method.............................................. 1 Comparing multiple OAM and classic OAM configurations.........................................................................2 Collections....................................................................................................................................................3 Application programming interface (OSREQ macro).................................................................................. 4 System-managed storage for data and space management......................................................................4 Moving objects throughout the hierarchy....................................................................................................6 Hardware and software interaction with OAM............................................................................................ 6 Parallel Sysplex® and OAM...........................................................................................................................7 OAMplex..................................................................................................................................................8 Shipping request limitations for larger data objects............................................................................. 9 OAMplex restrictions.............................................................................................................................. 9 OAMplex and file systems....................................................................................................................10 OAM components.......................................................................................................................................11 Protecting against inadvertent object deletion.........................................................................................11 CBROAMxx PARMLIB member statements...............................................................................................12 SETDISK statement for file systems used by OAM............................................................................. 12 SETOAM statement for object tape volumes.......................................................................................13 SETOPT statement for options.............................................................................................................13 SETOSMC statement for OSMC processing......................................................................................... 13 SETTLIB statement for tape library settings....................................................................................... 13 OAMXCF statement for parallel sysplexes.......................................................................................... 14 ONLYIF statement for parallel sysplexes............................................................................................ 14 ISMF library management role within OAM.............................................................................................. 14 Installation storage management policy overview...................................................................................14 SMS constructs and ACS routines............................................................................................................. 16 Understanding the storage group construct........................................................................................17 Understanding the storage class construct.........................................................................................24 Understanding the management class construct............................................................................... 31 Understanding the data class construct..............................................................................................32 ACS routines......................................................................................................................................... 33 OAM address space................................................................................................................................... 34 iii MEMLIMIT for OAM....................................................................................................................................35 OTIS address space................................................................................................................................... 35 Optical storage...........................................................................................................................................36 Optical disk cartridges......................................................................................................................... 37 Optical recording techniques...............................................................................................................37 Optical volumes....................................................................................................................................38 Optical media types..............................................................................................................................40 Optical disk drives................................................................................................................................ 40 Optical libraries.................................................................................................................................... 41 Tape storage...............................................................................................................................................44 Tape capacity and compaction............................................................................................................ 49 Tape capacity and performance scaling.............................................................................................. 50 Performance segmentation considerations........................................................................................ 50 KB tracking........................................................................................................................................... 51 Tape encryption support...................................................................................................................... 52 Tape volumes........................................................................................................................................53 Tape drives............................................................................................................................................57 Tape libraries........................................................................................................................................ 59 Object tape and optical volume management.......................................................................................... 59 Recycling tape and optical volumes.................................................................................................... 60 Deleting tape and optical volumes.....................................................................................................
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