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SAN Volume Controller: Best Practices and Performance Guidelines by

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Chapter 7.3. Selecting the number of arrays per MDG

Page 105

Chapter 7. Managed disk groups 105 Figure 7- 4 Response time comparison between two LUNs per array and one LUN per array The test shows a small response time advantage to the two LUNs per array configuration and a small IOPS advantage to the one LUN per array configuration for sequential workloads. Overall, the performance differences between these configurations are minimal. 7.3 Selecting the number of arrays per MDG The capability to stripe across disk arrays is the single most important performance advantage of the SVC; however, the more arrays you stripe across is not necessarily better. The objective here is to only add as many arrays to a single MDG as required to meet the performance ...

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