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SAN Volume Controller: Best Practices and Performance Guidelines by

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Chapter 9.4.2. Global mirror guidelines

Page 159

Chapter 9. Copy services 159 unusually high. The peak workload must be evaluated by considering the average write workload over a period of one minute or less plus the required synchronization copy bandwidth. SVC uses some of the bandwidth for its internal SVC inter- cluster heartbeat. The amount of traffic depends on how many nodes are in each of the two clusters. Table 9- 2 shows the amount of traffic, in megabits per second, generated by different sizes of clusters. These numbers represent the total traffic between the two clusters, when no I/ O is taking place to mirrored VDisks. Half of the data is sent by one cluster, and half of the data is sent by the other cluster. The traffic will be divided ...

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