A Virtual Machine Migration Method for Shared Memory Between Nodes

Abstract

The invention discloses a virtual machine migration method with nodes sharing memory. When migrating to a goal node and using the virtual machine with a remote memory, two migration mode are included: a non-copy mode and a copy mode. The non-copy mode is that memory control of all the nodes used by the virtual machine is transmitted to goal node. The non-copy mode comprises a local node memory and a remote node memory. The copy mode is that stored data of nodes, except the goal node, used by the virtual machine are transmitted to the goal node, and the control of the remote memory of the goal node used by the virtual machine to the goal node. Through the virtual machine migration method with the nodes sharing the memory, the operation of copying the memory data when the virtual machine migrates can be reduced, the system property is improved, the width of a transmission passageway is reduced, the operating speed of the system is improved, the power consumption is saved, and thereby the operating cost of the system is lowered.

Description

technical field [0001] The invention relates to a virtual machine migration method between nodes, in particular to a virtual machine migration method for shared memory between nodes. Background technique [0002] In cloud servers and data center systems, in order to make full use of hardware resources, multiple virtual machines (virtual machines) will run on one server. According to management requirements or when accidents occur (such as power outages), virtual machine migration operations are often performed. The technology is now fully realized. [0003] This invention is another innovation based on a patent -- "memory sharing between nodes", that is, one node can use the memory of another node, commonly known as "borrowing". The data transfer operation performed by virtual machine migration in the case of memory sharing has different characteristics from that in the case of non-shared memory between nodes. In the cloud server / data center system, nodes borrow memory fro...

AI Technical Summary

Problems solved by technology

According to the existing method, the remote borrowed memory needs to be transferred twice, which will not only occupy the interconnection channel, but also cause the system to run slower when the channel pressure is high, and increase the power consumption of the system.

[0007] (2) If the remote memory is sent back to the local again, it will inevitably lead to further increase in power consumption

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