Chapter 10.2.2. Path selection
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Chapter 10. Hosts 177 is running on the host. The multipathing software manages the many paths that are available to the VDisk and presents a single storage device to the operating system. 10.2.1 Preferred path algorithm I/ O traffic for a particular VDisk is, at any one time, managed exclusively by the nodes in a single I/ O Group. The distributed cache in the SAN Volume Controller is two- way. When a VDisk is created, a preferred node is chosen. This is controllable at the time of creation. The owner node for a VDisk is the preferred node when both nodes are available. When I/ O is performed to a VDisk, the node that processes the I/ O duplicates the data onto the partner node that is in the I/ O Group. ...
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