DFSMS ADVANCED COPY SERVICES PDF
Advanced Copy Services comprises the following functions and enhancements. Mirror functions provide a consistent point-in-time copy of data at the recovery. The purpose of this publication is to help you understand and use IBM Advanced; Copy Services functions. It describes three dynamic copy. Abstract for DFSMS Advanced Copy Services. This information supports z/OS® ( ZOS) and contains information about Data Facility Storage Management.
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In this configuration, the following differences exist between these two management approaches: The vfsms shown in the figure applies to an unplanned HyperSwap as well as to a planned HyperSwap between volumes A and B.
High availability is achieved through HyperSwap between the A and B volumes. IBM, therefore, cannot guarantee or imply reliability, serviceability, or function of these programs.
The SDM reader tasks resume the process, at this point reading record sets from the B storage subsystems, but only those record sets accumulated from the time of the HyperSwap and until SDM was reconnected to the B volumes. Figure 13 is basically the same as Figure 10 on page 18; the only difference is the IP-based connectivity between the two GDPS instances that execute in this environment.
Among other state and condition information, the UCB also contains a link to the path or group of paths needed to connect to the device itself.
RMZ Resync offers prompt restart capabilities at the remote site when the primary site totally fails. The furnishing of this document does not give you any license to these patents.
During that time, in the course of reading changed records out of disk subsystem A, SDM cannot access the A volumes due to the freeze operation when the HyperSwap operation starts.
CONTENTS Table of Contents
IBM may not offer the products, services, or features discussed in this document in other countries. IOS performs the actual swap activity. You can send license inquiries, in writing, to: Figure 9 shows a schematic view of a GDPS-controlled configuration. As a result, zGM stalls and no longer replicates data.
Documents Flashcards Grammar checker. This list is derived from observation and analysis over time of situations without HyperSwap support that had the potential of Parallel Sysplex outages or that actually caused an outage.
APPENDIX “z/OS V1R DFSMS Advanced Copy Services” IBM Library Server
However, this table is not a complete list of all the relevant points of comparison. Because of the way light is reflected, there are two Thanks to the following people for their contributions to this advxnced This information contains examples of data and reports used in daily business operations. This quiescence operation is advancfd by the user. Such trademarks may also be registered or common law trademarks in other countries. This action contributes to high availability and even to continuous availability when performing a HyperSwap in a planned fashion for whatever copj, and there are plenty of reasons.
At the same time, volume A is also primary to the zGM session, with volume C as the corresponding zGM secondary volume. Volume B is the cascaded volume, and it has the following two roles: This situation applies especially to the Global Mirror relationship where the xfsms autonomically manages the formation of consistency groups and thus guarantees consistent data volumes at all times at the remote site. An Ethernet route to the disk storage subsystem.
Slide 1 – Western Cape Government. Volume B is the secondary or target volume for volume A. This three-site mirroring solution is often simply called MzGM. The following paragraph does not apply to the United Kingdom or any other country where advahced provisions are inconsistent with local law: Conceptually MzGM is a multiple target configuration with two copy relationships off the same primary or source device. Any reference to an IBM product, program, or service is not intended to state or imply that only that IBM product, program, or service may be used.
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A first step is most likely the HyperSwap operation itself. High availability requirements have become as important as the need to quickly recover after a ckpy affecting a data processing center and its services. We recommend you dedicate the D volumes to SDM journals only. TPC-R does not provide automation procedures that can be activated through certain events. These examples have not been thoroughly tested under all conditions. The distance between the metropolitan sites and the remote site is not limited when replicating volumes through zGM.