Method, device and system for achieving thermal migration of virtual machine

Abstract

The invention discloses a method, a device and a system for achieving thermal migration of a virtual machine. The method comprises that a source virtual machine management device on a source physical machine determines non-temporary data memory pages of the virtual machine on the source physical machine; the non-temporary data memory pages are copied to a target physical machine from the source physical machine; dirty pages produced in a non-temporary data memory page copying process are copied to the target physical machine from the source physical machine till the ratio of the number of the non-copied dirty pages to the number of the non-temporary data memory pages is lower than a preset value; and migration is performed on the virtual machine when the ratio of the number of the non-copied dirty pages to the number of the non-temporary data memory pages is lower than the preset value. According to the method, processes and memory pages in a multi-process system are classified, and temporary data memory pages are not copied in a dirty page circulatory copying process, so that waste of a system central processing unit (CPU) and the network bandwidth is reduced, and the user experience is improved.

Description

technical field [0001] Embodiments of the present invention relate to a virtualized computer system, and more specifically, to a method, device and system for implementing live migration of a virtual machine. Background technique [0002] Virtual machine technology is widely used in the field of information technology, and is penetrating into the field of communication. The hot migration technology is a major technical highlight of the virtual machine, which enables the virtual machine to migrate between two physical machines, and the migration process has little impact on business processing. The existing virtual machine hot migration technology uses a pre-copy method. This method first copies all memory pages of the virtual machine from the source physical machine to the target physical machine, and monitors all memory pages during the copy process, and marks the pages changed during the copy process as dirty pages; After a full copy of the memory, copy the generated dir...

AI Technical Summary

Problems solved by technology

[0003] However, during the cyclic copying of dirty pages, as long as one byte of the memory page is changed, it will also be marked as a dirty page, which will cause a large amount of temporary data changes in the system to be cyclically copied to the target physical machine, resulting in Live migration of virtual machines takes a long time and greatly wastes system CPU processing resources and network bandwidth resources. According to estimates, the waste exceeds 90%.

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