Chapter 5.8.2. Balancing workload across DS8000 controllers
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Chapter 5. Storage controller 71 Figure 5- 3 Storage Manager 5.8.2 Balancing workload across DS8000 controllers When configuring storage on the DS8000, it is important to ensure that ranks on a device adapter ( DA) pair are evenly balanced between odd and even extent pools. Failing to do this can result in a considerable performance degradation due to uneven device adapter loading. The DS8000 assigns server affinity to ranks when they are added to an extent pool. Ranks that belong to an even extent pool have an affinity to server0, and ranks that belong to an odd extent pool have an affinity to server1. Figure 5- 4 on page 72 shows an example of a configuration that will result ...
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