Summary of changes
This section describes the technical changes made in this edition of the book and in previous editions. This edition also includes minor corrections and editorial changes that are not identified.
Summary of Changes
for IBM Redbooks publication SG24-6374-12
for IBM GDPS Family: An Introduction to Concepts and Capabilities
as created or updated on April 17, 2017.
March 2017, Thirteenth Edition
New and changed information
•The following sections are updated or added in support of the new GDPS/MGM Multi-Target 3-site solution:
•Updated section 3.1.4, “Protecting other CKD data” on page 67, to reflect that GDPS/PPRC now provides foreign systems support for Linux on z Systems running as a guest under KVM on z Systems.
•The following sections are updated/added in support of the new Zero Data Loss specialized configuration for GDPS/Active-Active:
•Updated section 10.2.1, “Guest Linux under z/VM” on page 299, to reflect that GDPS will now automatically switch the dump volume pointers when an IBM HyperSwap® occurs.
•Updated section 11.3.1, “GDPS/MGM 3-site overview” on page 338, to remove a reference to the MGM Incremental Resynchronization Tool, which is no longer supported.
•The GDPS/PPRC, GDPS/PPRC HM, and GDPS Virtual Appliance web interfaces are no longer supported. All references have been removed.
•All occurrences of the term “Fixed Block Architecture” (FBA) have been removed or changed to “Fixed Block” (FB) for clarity.
•Several small changes have been made for clarity or to correct minor errors.
June 2016, Twelfth Edition
New and changed information
•Information regarding the GDPS/PPRC and GDPS/PPRC HM web interfaces has been refreshed in the following sections:
This is due to the introduction of a new, modernized GDPS graphical user interface for those offerings.
•The following sections are updated/added in support of the new GDPS/MGM Multi-Target 4-site solution:
 – 11.4, “GDPS Metro/Global Mirror 4-site solution” on page 346 is updated to describe the new GDPS/MGM 4-site with multi-target configuration.
•Several small changes have been made for clarity or to correct minor errors.
June 2015, Eleventh Edition
New and changed information
•All references to the IBM TotalStorage 3494-based Virtual Tape Subsystem are removed, because these devices are no longer supported.
•GDPS/MTMM and the GDPS Virtual Appliance are added to 1.5, “GDPS offerings” on page 8.
•Several sections are updated in Chapter 2, “Infrastructure planning for availability and GDPS” on page 13, with information on MTMM and GDPS/MTMM.
•The following sections are updated:
•Two subsections, 3.14, “Summary” on page 100 and 4.11, “Summary” on page 135, are updated with information related to the new GDPS/MTMM and GDPS Virtual Appliance offerings.
•References to GDPS Sysplex Timer (ETR) related processing are removed because support for the 9037 Sysplex Timer has been discontinued.
•Several small changes have been made for clarity or to correct minor errors.
August 2014, Update to Tenth Edition
New and changed information
•New information about the GDPS/MGM 4-site solution is added to several sections:
•Where required, instances of GDPS/MGM and MGM are updated to indicate whether a 3-site or 4-site configuration is being referred to.
•GDPS/PPRC references to an Active/Active and Active/Standby configuration are changed to single-site and multisite workload respectively and minor changes are made for clarification.
•Updated 10.2.1, “Guest Linux under z/VM” on page 299 with information regarding support for alternate subchannel sets to increase scalability.
•Added information about support for stand-alone servers and high availability options for the SA AppMan server to 10.3, “Distributed Cluster Management” on page 307.
•Several other small changes are made for clarity or to correct minor errors.
October 2013, Update to Ninth Edition
New and changed information
•The following sections were added or updated in support of the GDPS/Active-Active V1R4 enhancements:
 – Section updated, “What is a workload” on page 233
March 2013, Ninth Edition
New and changed information
•“Protecting tape data” on page 65 is updated to include information about the TS7700 “in-doubt” tape support that is added in GDPS 3.10.
•“Region Switch” on page 148 extended to describe the different possible configurations when performing a GDPS region switch
•The following sections are updated with information about the GDPS/PPRC and GDPS/PPRC HM support of consistent IBM FlashCopy® using the IBM FlashCopy Freeze capability of the disk subsystems:
•The following sections are updated with the GDPS Health Check management panel information:
•Information about the legacy Freeze option is removed from the following sections:
•The following new sections are added to describe add-on GDPS tools available for each of the GDPS products:
•Some screen captures are refreshed.
•Several sections are renamed or reorganized for clarity.
•Several small changes were made for clarity or to correct minor errors.
July 2012, Eighth Edition
New information
•A new section “HyperSwap with less than full channel bandwidth” on page 61 is added to the GDPS/PPRC chapter. An equivalent section is added to the GDPS/HM chapter.
•3.6.1, “GDPS/PPRC health checks” on page 92 in Chapter 3, “GDPS/PPRC” on page 53, has been updated to include information that GDPS now ships sample coexistence policy definitions for the GDPS checks that are known to be conflicting with those provided with IBM z/OS.
•4.4.1, “GDPS/PPRC HM health checks” on page 127 in Chapter 4, “GDPS/PPRC HyperSwap Manager” on page 103, has been updated to include information that GDPS now ships sample coexistence policy definitions for the GDPS checks that are known to be conflicting with those provided with IBM z/OS.
•A new section “System Management actions” has been added in Chapter 3, “GDPS/PPRC” on page 53 to accommodate customer procedures to perform specific LOAD and RESET actions
•A new section “SYSRES Management” on page 91 has been added to remove the requirement for clients to manage and maintain their own procedures when IPLing a system on a different alternate SYSRES device.
•The ability to use commands for taking a FlashCopy is added to 4.3.2, “NetView commands” on page 125.
•A new section “Query Services” has been added to Chapter 5, “GDPS/XRC” on page 137. It describes new capabilities in GDPS/XRC that improve system management and availability through autonomic capabilities.
•A new section “Region Switch” has been added in 5.4, “Managing the GDPS environment” on page 142 to reflect a process for performing a planned Site Switch between the two sites that act as the application and recovery sites. New capabilities of the GDPS/XRC product assist with and simplify various procedural aspects of a Site Switch or Return Home operation.
•A new section 5.6.4, “Vary-After-Clip automation” on page 155 has been added to Chapter 5, “GDPS/XRC” on page 137. With XRC primary devices online in the SDM systems, Vary After Clip processing detects an XRC primary volume has been relabelled and automates varying the subject device online with the new volume label in SDM systems, and schedules a VOLSER REFRESH-type GDPS Configuration update.
•A new section 6.6.1, “GDPS/GM Copy Once facility” on page 181 has been added in Chapter 6, “GDPS/Global Mirror” on page 163 to provide information about the Copy Once facility to copy volumes that have data sets on them that are required for recovery but the content is not critical, so they do not need to be copied all the time.
•A new section 10.2, “GDPS/PPRC Multiplatform Resiliency for z Systems” on page 299 has been added in 10.2, “GDPS/PPRC Multiplatform Resiliency for z Systems” on page 299 to reflect the GDPS system management capabilities for IBM z/VM® and Linux systems. GDPS controlled shutdown of z/VM (also referred to as a graceful shutdown) has also been included.
Changed information
•2.8, “Flexible server capacity” on page 42 in Chapter 2, “Infrastructure planning for availability and GDPS” on page 13 has been updated to reflect the enhanced GDPS CBU and On/Off Capacity on Demand (OOCoD) handling.
•Section “Addressing z/OS device limits in GDPS/PPRC and GDPS/MTMM environments” in 2.4.1, “PPRC (IBM Metro Mirror)” on page 23 is updated to reflect the new support, the PPRC secondary of IPL, IODF and Stand-Alone Dump devices for z/OS systems in the GDPS sysplex can be defined in the alternate subchannel set (MSS1).
•Section “PPRC and MTMM-based solutions” in 2.9, “Cross-site connectivity considerations” on page 44 is updated to include considerations about possible use of IBM HyperSwap with less than full bandwidth cross-site connectivity.
•Section “Sysplex resource management” in 3.5, “Managing the GDPS/PPRC environment” on page 78 has been updated to include GDPS Coupling Facility Management with a single CFRM policy.
•Section “GDPS HyperSwap function” in Chapter 3, “GDPS/PPRC” on page 53 and in Chapter 4, “GDPS/PPRC HyperSwap Manager” on page 103 has been updated to include information about the new, proactive unplanned HyperSwap trigger in conjunction with a new function available in z/OS 1.13 and the new Storage Controller Health Message capability in the IBM DS8000 disk subsystems.
•5.6.1, “FlashCopy disk definition in the GDPS systems” on page 154 in Chapter 5, “GDPS/XRC” on page 137 has been updated to include the new FlashCopy protection support, a new GDPS logic to ensure that when a FlashCopy is taken, it is only taken if the FlashCopy source devices represent a valid recovery point.
•10.2.1, “Guest Linux under z/VM” on page 299 in 10.2, “GDPS/PPRC Multiplatform Resiliency for z Systems” on page 299 has been updated to reflect various enhancements in GDPS/PPRC xDR such as definition of two Proxy nodes for each z/VM host, shutdown of an xDR-managed z/VM system in multiple phases, and z/VM system shutdown using the GDPS Stop Standard Action (or equivalent script statement) with all xDR-managed guests stopped in parallel.
•10.2.1, “Guest Linux under z/VM” on page 299 in 10.2, “GDPS/PPRC Multiplatform Resiliency for z Systems” on page 299 reflects that GDPS 3.9 xDR for the z/VM guest environment no longer supports REXEC as the communication protocol between the xDR Proxy and the GDPS controlling systems. SOCKET protocol remains the only supported protocol.
•10.2, “GDPS/PPRC Multiplatform Resiliency for z Systems” on page 299 has been updated to reflect IBM z/VSE® guests of xDR-managed z/VM systems can be enabled for special GDPS xDR monitoring and management.
•10.2, “GDPS/PPRC Multiplatform Resiliency for z Systems” on page 299 has been updated to provide added protection for an xDR-managed z/VM or native Linux system that must be reset during HyperSwap, to ensure that the subject system does not continue to run and update the former primary disks.
•2.5, “Tape resident data” on page 38 and 3.1.2, “Protecting tape data” on page 65 has been updated to reflect the GDPS/PPRC support for configuration management of the IBM Virtualization Engine TS7700.
•6.3, “GDPS/GM management for distributed systems and data” on page 169 has been updated to reflect the DCM capability in GDPS/GM for managing local cluster sets using IBM Tivoli® System Automation Application Manager.
•The RCMF offerings are generally replaced by more full featured GDPS offering peers, so the RCMF appendixes have been removed.
June 2011, Seventh Edition
New information
•This document was updated to reflect the changes and new capabilities of GDPS V3.8 and the GDPS/Active-Active solution
•A new section “IBM software replication products” has been added to Chapter 2, “Infrastructure planning for availability and GDPS” on page 13 to provide an introduction to the supported IBM software-based replication products within the GDPS/Active-Active solution.
•A new section “Freeze policy (PPRCFAILURE policy) options” has been updated to include information about the new PPRCFAILURE and PRIMARYFAILURE freeze/swap policy options and enhanced Freeze and Stop Conditional processing.
•New sections “STP CTN role reassignments: Planned operations” on page 87, “STP CTN role reassignments: Unplanned failure” on page 90, and “STP WTOR IEA394A response: Unplanned failure” on page 90 have been added to Chapter 3, “GDPS/PPRC” on page 53. They describe the new scripting capability to reassign roles in an STP-only Coordinated Timing Network (CTN), and the capability to respond to WTORs posted by IBM z/OS.
•A new section 4.3.2, “NetView commands” on page 125 has been added to Chapter 4, “GDPS/PPRC HyperSwap Manager” on page 103 to describe the HYPERSW command and the new GDPSTIME command to reassign roles in an STP-only CTN.
•New sections “FlashCopy disk definition in the GDPS systems” and “GDPS/XRC Configuration checking” have been added to Chapter 5, “GDPS/XRC” on page 137. They describe miscellaneous enhancements that improve scalability, management, and data consistency for GDPS/XRC.
•New sections “GDPS/GM Query Services”, and “Global Mirror Monitor integration” have been added to Chapter 6, “GDPS/Global Mirror” on page 163. They describe new capabilities in GDPS/GM that improve system management and availability through autonomic capabilities.
•A new chapter, Chapter 8, “GDPS/Active-Active solution” on page 231 is added to describe the GDPS/Active-Active solution.
•A new section 10.2.4, “Customization Verification Program” on page 306 was added to describe new capabilities to verify that installation and customization activities have been carried out correctly for both xDR native and guest Linux on z Systems environments.
•A new section 10.2.5, “xDR Extended Monitoring” on page 307 was added to describe the extended monitoring function now available for xDR systems that previously was available only for z/OS systems.
•A new section “GDPS/MGM Procedure Handler” has been added to Chapter 9, “Combining local and metro continuous availability with out-of-region disaster recovery” on page 331 to describe its function and to mention that this tool is a fully supported tool in GDPS/MGM V3.8.
Changed information
•The introductory chapters, Chapter 1, “Introduction to business resilience and the role of GDPS” on page 1 and Chapter 2, “Infrastructure planning for availability and GDPS” on page 13 are updated to include new information about the considerations when using software replication for the GDPS/Active-Active solution.
•Section 3.1.3, “Protecting distributed (FB) data” on page 66 has been updated to add support for SCSI attached FB disk used by native Linux on z Systems systems under GDPS xDR control.
•Section “Flexible testing” has been updated in Chapter 5, “GDPS/XRC” on page 137 to indicate changes in IBM Zero Suspend FlashCopy support.
•Section 10.1, “Open LUN Management function” on page 296 was updated to include support for SCSI attached FB disk used by native Linux z Systems under GDPS xDR control.
•Section 10.2, “GDPS/PPRC Multiplatform Resiliency for z Systems” on page 299 was reformatted to include separate sections 10.2.1, “Guest Linux under z/VM” on page 299 and 10.2.2, “Native Linux on z Systems” on page 303 and updated to include support for SCSI-attached FB disk used by native Linux on z Systems under GDPS xDR control.
August 2010, Sixth Edition
New information
•This document has been updated to reflect changes and new capabilities in GDPS V3.7 including support for PPRC secondary devices defined in an alternate subchannel set and xDR improvements with starting and stopping Linux systems on z Systems.
•Added references to Microsoft Windows clusters (particularly in “Integrated configuration of GDPS/GM and VCS clusters” on page 313) as part of the GDPS DCM for VCS function.
Changed information
•Chapter 1, “Introduction to business resilience and the role of GDPS” on page 1 has been rewritten to remove references to SHARE workgroup material and the focus on disaster recovery. The overview of the GDPS family of offerings was also updated to help this chapter act as a stand-alone high level overview.
•Chapter 2, “Infrastructure planning for availability and GDPS” on page 13 has been modified, moving some of the more technical details to subsequent chapters, but retaining the broad overview of numerous areas of technology infrastructure that are touched or leveraged by a GDPS solution.
•Section 3.1.1, “Protecting data integrity and data availability with GDPS/PPRC” on page 54 was re-written to remove the discussion about detailed “CRIT” settings not recommended for use with GDPS. References to other documentation with details about these settings are still included. Similar changes were made to Chapter 4, “GDPS/PPRC HyperSwap Manager” on page 103.
•References to Metro Mirror were replaced by PPRC when discussing the IBM synchronous mirroring architecture. The brand name of IBM Metro Mirror continues to be used for the implementation of the PPRC architecture included on the IBM Enterprise Storage Server® and DS8000 family of storage products. A similar change was made for XRC and the IBM brand name of z/OS Global Mirror.
•There was a minor reordering of the chapters following the overview of the four primary GDPS offerings.
•Removed Peer-to-Peer tape from “DR in two data centers, global distance” on page 370 because the configuration of this legacy hardware (with immediate mode) is not appropriate as a recommendation for global distances.
September 2009, Fifth Edition
New information
•This document has been updated to reflect changes and new capabilities in GDPS V3.6.
•A new section “Other facilities related to GDPS” was created as a repository for miscellaneous topics such as HyperSwap coexistence available in previous versions of GDPS, and new topics available with GDPS V3.6 such as Reduced impact initial copy and resynchronization and Query Services.
Changed information
•2.1.2, “Multisite sysplex considerations” on page 15 was updated to change the maximum fiber distance from 100 km to 200 km (with RPQ).
•2.8.1, “Capacity Backup upgrade” on page 42 and 2.8.2, “On/Off Capacity on Demand” on page 43 have been updated to indicate the general availability of new functions for GDPS V3.5 and higher.
•Multiple changes were made in 2.9, “Cross-site connectivity considerations” on page 44 to reflect the recently available Parallel Sysplex InfiniBand technology for coupling and STP and HMC connectivity requirements for STP.
•Tables provided in Chapter 3, “GDPS/PPRC” on page 53, Chapter 4, “GDPS/PPRC HyperSwap Manager” on page 103, Chapter 5, “GDPS/XRC” on page 137, and Chapter 6, “GDPS/Global Mirror” on page 163 that compare functions offered by each GDPS offering have been updated to include a comprehensive list of GDPS functions available to date.
September 2008, Fourth Edition
New information
This document has been updated to reflect changes and new capabilities in GDPS V3.5.
March 2007, Third Edition
New information
•This document has been updated to reflect changes and new capabilities in GDPS V3.3 and GDPS V3.4.
•A new section, “Synchronous versus asynchronous data transfer” on page 19, was added to explain the business impact of using Synchronous and Asynchronous remote copy technologies.
•Multiplatform for z Systems now supports native zLinux LPARs.
•GDPS/PPRC and GDPS HyperSwap Manager have been enhanced to provide coexistence support for HyperSwap and IBM TDMF.
•IBM IMS™ XRF coexistence support added to GDPS/PPRC and GDPS HyperSwap Manager.
•GDPS/PPRC enables use of the PPRC failover and failback support, if available, in all disk subsystems.
•GDPS/Global Mirror has been enhanced to provide “No UCB FlashCopy’ support.
•Zero Suspend FlashCopy support added to GDPS/XRC and GDPS/MzGM.
•Availability of a GDPS Qualification Program for vendor storage subsystems.
•New WEB GUI interface support added for GDPS/PPRC.
•GDPS/PPRC and GDPS HyperSwap Manager have been enhanced so that a HyperSwap can now be triggered by a non-responsive primary device, in addition to the existing error conditions that can cause a HyperSwap.
•GDPS/PPRC has been enhanced to support the new GDPS Enhanced Recovery Services in IBM z/OS 1.8.
•The ability has been added to GDPS/PPRC to do a planned freeze covering both CKD and FBA devices.
•FlashCopy support for Open LUN devices has been added to GDPS/PPRC and GDPS HyperSwap Manager.
•GDPS/XRC has been enhanced to support the new asynchronous write support for system logger stagging data sets added in z/OS 1.7.
Changed information
•The GDPS/PPRC BRS configuration has moved to Chapter 3, “GDPS/PPRC” on page 53.
•GDPS/XRC scalability enhancements allow up to 20 SDMs in a single LPAR, of which 13 can be coupled together into a cluster. Up to 14 clusters can be coupled together increasing the architectural limit to 182 SDMs.
December 2005, Second Edition
New information
•Information about the GDPS/GM offering has been added.
 
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