Chapter 7.4. Striping compared to sequential type
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Chapter 7. Managed disk groups 111 Figure 7- 8 IOPS comparison between eight arrays/ MDG and four arrays/ MDG with two MDGs active Figure 7- 8 shows the results from the test where only two of the four MDGs are loaded. This test shows no difference between the eight arrays per MDG configuration and the four arrays per MDG configuration for random workload. This test shows a small advantage to the eight arrays per MDG configuration for sequential workloads. Our conclusions are: The performance advantage with striping across a larger number of arrays is not as pronounced as you might expect. You must consider the number of MDisks per array along with the number of arrays per MDG to understand ...
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