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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Linux is a trademark of Linus Torvalds in the United States, other countries, or both. 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.

This quiescence operation is performed by the user. He has written many IBM Redbooks and has developed and taught technical workshops. These examples have not been thoroughly tested under all conditions. IBM may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you. Apply all writes on the secondary in the same sequence as they occur on the primary volumes.

The benefits of zGM when compared to GM include the requirement for less disk space zGM requires only a single copy of the database at the remote site, compared to two copies with GM and greater scalability zGM can handle much larger configurations than GM.

However, this table is not a complete list of all the relevant points of comparison. Microsoft, Windows, and the Windows logo are trademarks of Microsoft Corporation in the United States, other countries, or both. An even more severe problem was the time the process itself required to complete.

PREFACE “z/OS V1R DFSMS Advanced Copy Services” IBM Library Server

He holds a degree in economics from the University of Heidelberg and in mechanical engineering from FH Heilbronn. Figure 9 shows sevrices schematic view of a GDPS-controlled configuration. Solutions have evolved from a two-site approach to include a third site, thus transforming serices relationship between the primary and secondary site into a high availability configuration.

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To illustrate them as completely as possible, the examples include the names of individuals, companies, brands, and products. 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.

In the present discussion, we are still referring to Basic HyperSwap, even when describing the process of incrementally swapping back to the original configuration.

At the same time, volume B is also the primary or source volume for volume C.

PREFACE About This Book

This information could serviced technical inaccuracies or typographical errors. Thus, you must create a new zGM session and perform a full initial copy between volume A and volume C.

This action contributes to high availability and even dfzms continuous availability when performing a HyperSwap in a planned fashion for whatever reasons, and there are plenty of reasons.

Questions on the capabilities of non-IBM products should be addressed to the suppliers of those products. Such trademarks may also be registered or common law trademarks in other countries. This three-site mirroring solution is often simply called MzGM.

Figure 2 shows a MzGM configuration. This information contains examples of data and reports used in daily business operations.

z/OS DFSMS Advanced Copy Services

As a result, zGM stalls and no longer replicates data. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication.

In our example in Figure 4 on page 8, the reverse direction is from device to device You can send license inquiries, in writing, to: During normal operations, no software is involved in driving this configuration.

In Figure 9, this system, SY1P. All Copy Services functions are handled within the DS firmware. The journal or D volumes are used by SDM only. The materials at those Web sites are not part of the materials for this IBM product and use of those Web sites is at your own risk. 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.

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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. Metro Mirror relationship between A and B Volumes A and B are in a synchronous copy services relationship and are the base for potentially swapping both devices through HyperSwap. A first step is most likely the HyperSwap operation itself.

In this context we recommend you configure the implicated disk storage subsystems to be identical as possible in regard to base volumes and alias volumes. Combining Metro Mirror and continue with Global Mirror places the middle volume in a configuration that is known as cascaded. You may copy, modify, and distribute these sample programs in any form without payment to IBM, for the purposes of developing, using, marketing or distributing application programs conforming to the application programming interface for the operating platform for which the sample programs are written.

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Both relationships copy from the same primary or source volume but avvanced different secondary or target volumes. However, it is the user’s responsibility to evaluate and verify the operation of any non-IBM product, program, or service. As the name implies, it consists of a Metro Mirror relationship and a zGM relationship. Shifting the connectivity usually is not very difficult, because a FICON-switched infrastructure might exist and the required connectivity might already be configured.

Writes to SDM servicfs data sets on these D volumes.