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SAN Volume Controller: Best Practices and Performance Guidelines by

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Chapter 8.2.5. Governing of VDisks

Page 122

122 SAN Volume Controller: Best Practices and Performance Guidelines then all the paths through the owning node. Therefore, a preferred path is any port on a preferred controller, assuming that SAN zoning is correct. By default, the SVC assigns ownership of even- numbered VDisks to one node of a caching pair and the ownership of odd- numbered VDisks to the other node. It is possible for the ownership distribution in a caching pair to become unbalanced if VDisk sizes are significantly different between the nodes, or the VDisk numbers assigned to the caching pair are predominantly even or odd. To provide some flexibility in making plans to avoid this problem, the ownership for a specific VDisk can be explicitly ...

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