Dirty data write-back system in virtual environment

Abstract

The invention discloses a dirty data write-back system in a virtual environment. The dirty data write-back system comprises a virtual machine module, a privileged operation module and a virtual machine manager module, wherein the virtual machine module is used for sending a physical disk read-write request and dirty data from a user application program to the privileged operation module; and the privileged operation module is used for storing the physical disk read-write request and the dirty data in a virtual machine cache of the virtual machine manager module, and processing the physical disk read-write request when the utilization rate of the virtual machine cache reaches a predefined threshold value, and transmitting the dirty data to a physical disk. According to the dirty data write-back system disclosed by the invention, the read-write speed of the physical disk in the virtual machine and the utilization rate of the bandwidth of the physical disk in the virtual machine can be increased, the reliability of a file system in the virtual machine can be enhanced, the interferences of read-write operations of the physical disks among different virtual machines on the same physical platform can be reduced, and the transparency on application programs in the virtual machine and an operating system in the virtual machine and the expandability on a virtual platform are realized.

Description

technical field [0001] The invention relates to the field of computing system virtualization, and more specifically, the invention relates to a dirty data write-back system in a virtual machine environment. Background technique [0002] In the design of the virtualization platform, in order to ensure the security of the system, the instructions in the virtual machine cannot directly control the physical hardware, and can only be operated by the virtual machine manager. Existing virtual machine physical disk reading and writing methods use a front-end and back-end separation drive model to reduce the physical disk reading and writing performance overhead brought by the virtualization platform. [0003] However, the existing methods for reading and writing physical disks of virtual machines have the following deficiencies: 1. This method limits the bandwidth of reading and writing operations on physical disks of virtual machines; 2. This method does not read and write physical...

AI Technical Summary

Problems solved by technology

[0003] However, the existing methods for reading and writing physical disks of virtual machines have the following deficiencies: 1. This method limits the bandwidth of reading and writing operations on physical disks of virtual machines; 2. This method does not read and write physical disks of multiple virtual machines. Operations are effectively isolated, causing physical disk read and write performance interference between virtual machines; 3. When the file system of the virtual machine crashes unexpectedly, this method does not protect the effective memory of the virtual machine and has not had time to write Data on physical disks (i.e. dirty data)

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