Method for realizing hot migration of virtual machine image files and nas cluster system

Abstract

The invention provides a method and NAS cluster system for realizing mirror image document thermal migration of a virtual machine. The method comprises the following steps: each physical host node in an NAS cluster system is detected, and when each physical host node is detected and processed, whether a mirror image document, running at a current physical host, of a virtual machine is stored to local storage equipment of the current physical host is determined; and if not, under the circumstances that storage equipment of the virtual machine and the current physical host meet a preset condition, a virtual machine mirror image document needing to be migrated is migrated from a source physical host to the local storage equipment of the current physical host. According to the invention, with the method and the NAS cluster system, an I / O processing efficiency of an application file and an operation system file that are contained in a corresponding virtual machine mirror image document by the virtual machine is improved; and stability of the network operation of the cluster system is also guaranteed.

Description

technical field [0001] The invention relates to the field of computer information technology, in particular to a method for realizing hot migration of virtual machine image files and a NAS cluster system. Background technique [0002] A virtual machine refers to a complete computer system that is simulated by software and has complete hardware system functions and runs in a completely isolated environment. Through virtual machine software, users can simulate one or more virtual computers on a physical computer. These virtual machines work exactly like real computers. For example, users can install operating systems, install applications, access Internet resources, etc. To the user, it's just an application running on your physical computer, but to an application running in a virtual machine, it's a real computer. [0003] The migration of a virtual machine between physical hosts means that a virtual machine system running on a virtual machine manager program (Virtual Machi...

AI Technical Summary

Problems solved by technology

But this method usually causes two problems: First, the virtual machine is migrated between different physical hosts. If the storage is shared, only the system state is copied to the destination host, and finally the virtual machine state is rebuilt on the destination host to resume execution.

Users read and save data through the network, which not only takes up a lot of network resources, but also reads and writes much slower than the local

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