Each node can potentially be associated with a layer of some form of cache memory. Cache hierarchy follows the hierarchy of the tree in the sense that the higher the scheduler object is, the slower it will usually be for computations to efficiently utilize caches at the corresponding level of hierarchy. The cache of a scheduler object corresponding to a physical node can be a cache of memory corresponding to that node. The memory on the physical node can be thought of as a cache of the memory of the virtual machine.
Resource Migration—Additional Information
The hyper-kernel simulates part of the virtual hardware on which the virtual configuration resides. It is an event-driven architecture, fielding not only translated physical hardware events, but soft events, such as receipt of inter-node hyper-kernel messages generated by hyper-kernel code running on other nodes.