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/OSĀ® ( ZOS) and contains information about Data Facility Storage Management.

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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. An Ethernet route to the disk storage subsystem. The distance between the metropolitan sites and the remote site is not limited when replicating volumes through zGM. The scenario shown in the figure applies to an unplanned HyperSwap as well as to a planned HyperSwap between volumes A and B.

IBM has not tested those products and cannot confirm the accuracy of performance, compatibility or any other claims related to non-IBM products. Figure 2 shows a MzGM configuration.

This information could include technical inaccuracies or typographical errors. The zGM session suspends. Figure 9 shows a schematic view of a GDPS-controlled configuration. servics

The number of D volumes depends on the number of zGM volume pairs and the amount of data that is replicated from A to C because all replicated data is dfs,s twice in the remote location: Any functionally equivalent product, program, or service that does not infringe any IBM intellectual property right may be used instead.

The current volume set in C still represents a consistent set of volumes.

Thus, you must create a new zGM session and perform a full initial copy between volume A and volume C. The following HyperSwap interfaces alternatives are available: IOS then handles and manages all subsequent activities following the swap of all device pairs defined within the TPC-R HyperSwap session, which includes a freeze and failover in the context of Metro Mirror management.


This information contains sample application programs in source language, which illustrate programming techniques on various operating platforms.

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.

DFSMS Advanced Copy Services

This three-site mirroring solution is dffsms simply called MzGM. Apply all writes on the secondary in the same sequence as they occur on the primary volumes. Later, the session between A and C can be resynchronized through the zGM hardware bitmaps that are maintained in the primary disk subsystem for each zGM suspended volume.

We recommend you dedicate the D volumes to SDM journals only. A first step is most likely the HyperSwap operation itself.

DFSMS Advanced Copy Services

The SDM reader tasks resume the process, at this point reading record sets from the B storage subsystems, but only dfsmx record sets accumulated from the time of the HyperSwap and until SDM was reconnected to the B volumes.

MzGM is a three-site multiple target configuration in a System z dsms. Following serbices recommendation simplifies the handling of the configuration. He holds a degree in economics from the University of Heidelberg and in mechanical engineering from FH Heilbronn. Writes to SDM journal data sets on these D volumes. The numbers in the figure correspond to these steps. However, this table is not a complete list of all the relevant points of comparison.

Serbices company, product, or service names may be trademarks or service marks of others. Solutions have evolved from a two-site approach to include a third site, thus servoces the relationship between the primary and secondary site into a high availability configuration.

A is the active application volume with the following two copy services relationships: You can send license inquiries, in writing, to: Thanks to clpy following people for their contributions to this project: IBM may have patents or pending patent applications covering subject matter described in this document.

At the same time, volume A is also primary to the zGM session, with volume C as the corresponding zGM secondary advancdd.


The full initial copy after a volume A failure is the current drawback of the MzGM three-site configuration. This quiescence operation is performed by the user. Linux is a trademark of Linus Torvalds axvanced the United States, other countries, or both.

Slide 1 – Western Cape Government. Shifting the connectivity usually is not very difficult, because a FICON-switched infrastructure might exist and the required connectivity might already be configured. 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.

A failure at the remote site, volume C, does also not affect the application A volumes. Any references in this information to non-IBM Web sites are provided for convenience only and do not in any manner serve as an endorsement of aadvanced Web sites.

In Figure 9, this system, SY1P. Changed tracks are only masked in this bitmap and are not copied. As the name implies, it consists of a Metro Mirror relationship and a zGM relationship.

IBM, therefore, cannot guarantee or imply reliability, serviceability, or function of these programs. In our discussion, we leave open as to whether SY10 and SY11 are in the same or in different sites and whether Figure 10 depicts a single or multiple site workload configuration.

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

All of these names are fictitious and any similarity to the names and addresses used by an actual business enterprise is entirely coincidental. HyperSwaps can occur in a planned or an unplanned fashion. This initial copy might run for several hours, and cipy any error occurs with the B volumes before the initial copy is completed and with all zGM volume pairs in DUPLEX state, the remote site has consistent source data servlces in D to restart.