Virtual machine migration method and device

Abstract

The embodiment of the invention provides a virtual machine migration method and device. The method comprises the steps that the memory information of each virtual machine in the machine is acquired; when the load of the machine is too heavy, a virtual machine migration request is generated, and candidate servers and the memory information thereof are acquired; the memory information of each virtual machine and the memory information of the candidate servers are compared, so that the virtual machine needing migration in the machine is determined and a target server is selected from the candidate servers; and the virtual machine needing migration in the machine is migrated to the selected target server. According to the embodiment of the invention, a system has a high memory utilization rate after virtual machine migration; the sharp increasing of a physical memory requirement is avoided; and when the memory load of a server is too heavy, the server can acquire desired idle memory after virtual machine migration.

Description

technical field [0001] Embodiments of the present invention relate to data processing technologies, and in particular to a virtual machine migration method and device. Background technique [0002] With the vigorous development of virtualization technology, more and more data centers use virtual machines to provide services, and in data centers, memory often becomes the bottleneck of virtual machine integration. Memory sharing technology in virtualization environments has gained popularity in recent years Rapidly developed and widely used. In order to balance the load of the data center or effectively utilize server resources, it is often necessary to migrate virtual machines. The migration of a virtual machine refers to moving a virtual machine (including an operating system and an application program) on a source server to a target server in a cluster composed of multiple servers, and it can continue to run normally on the target server. The memory sharing technology in ...

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Problems solved by technology

[0004] However, the above scheme is not suitable for the virtualization environment using memory sharing technology, and the scheme obtained from the decision sometimes cannot achieve the optimal effect, and sometimes even cannot achieve the expected effect

First of all, there is no guarantee that the cluster formed by the servers after migration will have a high memory utilization rate, but the physical memory demand of the cluster may increase significantly

Second, when migrating a virtual machine due to tight memory resources, there is no guarantee that the expected free memory will be obtained after the migration

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