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IBM System Storage DS8000 Copy Services for Open Systems by Mark Wells, Alexander Warmuth, Luiz Moreira, Flavio Gondim de Morais, Peter Klee, Jana Jamsek, Michael Frankenberg, Charles Burger, Thorsten Altmannsberger, Bertrand Dufrasne, Peter Cronauer

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Global Copy performance and scalability
This chapter describes performance and scalability considerations when you use Global Copy for DS8000, which includes peak bandwidth requirements and adding capacity.
This chapter covers the following topics:
22.1 Performance
As the distance between DS8000 systems increases, the Metro Mirror response time is proportionally affected, which elongates write response time to the primary volumes because of its synchronous processing. When implementations over extended distances are required, ...

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