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100

101

Chapter 6. Copy Services 103

Figure 6-11 z/OS Global Mirror (DS6000 is used as secondary system)

6.2.4 Comparison of the Remote Mirror and Copy functions

In this section we summarize the use of and considerations for Remote Mirror and Copy

functions.

Metro Mirror (Synchronous PPRC)

򐂰 Description

Metro Mirror is a function for synchronous data copy at a distance.

򐂰 Advantages

There is no data loss and it allows for rapid recovery for distances up to 300 km.

򐂰 Considerations

There may be slight performance impact for write operations.

Server write

Write acknowledge

Write

ashynchronously

Primary server

System

Data

Mover

Secondary server

System Data Mover is

managing data consistency

DS8000 or ESS

DS6000

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