Network block device storage system and method for virtual machine

Abstract

The invention relates to a network block device storage system and method for a virtual machine. The method includes the steps that responses to execution conducted by users to application programs are made and a virtual machine operation system calls a virtual disk interface to send virtual disk reading and writing requests; the virtual disk interface transmits the reading and writing requests to a virtual block device drive unit; the virtual block device drive unit dispatches the reading and writing requests according to the I/O request types; according to the dispatching sequence, the reading and writing requests are packaged into network messages and the network messages are sent to a server through a storage communication protocol; the server receives the network messages sent by the multiple users, wherein the network messages carry IP addresses distributed to the users; parameters in the network messages are extracted and according to the extracted parameters, corresponding VSI serial numbers are searched for; through a file system and the corresponding VSI serial numbers, reading or writing operation is conducted on a corresponding region on a physical disk of the server. By the adoption of the network block device storage system and method for the virtual machine, packaging of intra-kernel services of the virtual machine is provided for the users and meanwhile network block device storage of the multiple users is supported.

Description

technical field [0001] The present disclosure relates to the field of cloud computing, and in particular, relates to a network block device storage system and method for virtual machines. Background technique [0002] Virtualization technology is currently one of the most active and promising research directions in the computer field, and has attracted extensive attention from academia and industry. However, storage virtualization limits the flexibility and independence of virtual machine applications. For example, live migration of virtual machines enables a computing system to migrate from one physical computer to another. However, due to the lack of virtualization of storage device data access, these mutually migrating virtual machines must be in a host machine. [0003] The network storage method is for the virtual machine to store data through the network transmission protocol. Compared with the traditional host method, the network storage method has the following adv...

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Problems solved by technology

[0007] Several network storage protocols and related tools have emerged, including NBD, iSCSI, etc., but their functions are single and cannot meet the functional requirements of virtual machines for network block devices:

[0008] (1) Since the virtual block device service software is generally composed of two parts, the core module and the core service, the developer of the new virtual block device service must design the core and the core of the virtual block device, which improves the virtual block device. Difficulty in developing device services

[0009] (2) The standard network storage protocol focuses on the network communication of data packets, because it does not have the functions of user management, multi-user concurrent I / O (Input / Output, input and output) request processing, and virtual image management

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