SAN Volume Controller: Best Practices and Performance Guidelines

Chapter 4.3. Adding or upgrading SVC node hardware

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58 SAN Volume Controller: Best Practices and Performance Guidelines There was no noticeable increase in CPU utilization in test B and test C. There was a slight reduction in CPU utilization when running test D. Figure 4- 1 SVC node CPU utilization during test runs Node 3 and node 4 were not used during this test. While there is a loss in performance when a node fails, and this test revealed our loss meant that we only saw 88.5% performance ( when compared to our best result, which is the normal SVC usage configuration), we conclude that it was still 21.3% better than direct- attached. 4.3 Adding or upgrading SVC node hardware If you have a cluster of six or fewer nodes of older hardware, ...