Virtual machine disk storage data migration method and system

Abstract

The invention discloses a method and system for migrating stored data of virtual machine disks. The method comprises the steps that a source end host monitors the read-write operations of all the virtual machine disks; when the writing operation is monitored, dirty data are redirected to middle nodes, and the positions, corresponding to the dirty data, of the virtual machine disks are recorded in a source end dirty data recording table; when the read operation on the dirty data is monitored, the dirty data are read from the middle nodes; the source end host and a destination end host interact to complete the migration process of a virtual machine to be migrated; the source end host stops monitoring the read and writing operations of all the virtual machine disks; the source end host sends a first dirty data recording table to the destination end host; the source end host reads second dirty data from the middle nodes and synchronizes the second dirty data to the disk of a virtual machine which is not migrated; the destination end host starts a new virtual machine, and the first dirty data are synchronized to the new virtual machine according to the first dirty data recording table. The method and system improve virtual machine read-write performance, and shorten virtual machine on-line migration time.

Description

technical field [0001] The invention relates to communication technology, in particular to a virtual machine disk storage data migration method and system. Background technique [0002] With the continuous development of computer technology and communication technology, computer virtualization technology shows a huge advantage in resource integration. Computer virtualization technology is a decoupling method that separates the underlying hardware devices of the computer from the upper-level operating system and application programs. The virtual machine monitor introduced by it directly manages the underlying hardware resources, and the abstracted virtual computer is called a virtual machine. Special applications for computer functions. [0003] In the prior art, when online migration of a virtual machine is performed, a method of directly copying data stored on a virtual machine disk to a destination host is usually adopted, such as post-copy technology. Specifically, the ...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a virtual machine disk storage data migration method and system, which are used to solve the problem that the read and write operations of the virtual machine on the source host and the online migration process compete for the disk I / O resources of the source host, and improve the read and write of the virtual machine. performance, shortening the live migration time of virtual machines

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