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Data backup method and system based on continuous data protection (CDP) protocol

A technology of continuous data protection and data backup, which is applied in the direction of data error detection and response error generation in the redundant operation, which can solve the problems of low write performance, inability to guarantee the consistency of IO data, loss of large IO data due to power failure And other issues

Pending Publication Date: 2021-11-05
济南浪潮数据技术有限公司
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Problems solved by technology

[0006] Aiming at the defects in the prior art, the present invention provides a data backup method based on the continuous data protection (CDP) protocol, aiming to solve the problem that the virtual machine IO write performance of the CDP backup based on the synchronous IO backup in the prior art is low, and based on In the process of asynchronous IO backup, excessive IO data will be lost due to abnormal power failure, and the data consistency of IO cannot be guaranteed.

Method used

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  • Data backup method and system based on continuous data protection (CDP) protocol
  • Data backup method and system based on continuous data protection (CDP) protocol
  • Data backup method and system based on continuous data protection (CDP) protocol

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[0054] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, and therefore are only examples, and cannot be used to limit the protection scope of the present invention.

[0055] figure 1 It is an implementation flowchart of the data backup method based on the continuous data protection CDP protocol provided by the present invention, which specifically includes the following steps:

[0056] In step S101, when the computer virtual disk has IO written, the control establishes a connection with the pre-created shared memory, and obtains the offset WriteOffset of the shared memory storing the writable IO and the offset ReadOffset of the shared memory storing the readable IO;

[0057] In step S102, according to the acquired offset WriteOffset of the shared memory storing writable I...

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Abstract

The invention relates to the technical field of data backup, and provides a data backup method and system based on a continuous data protection (CDP) protocol, and the method comprises the steps that a connection with a shared memory is built when IO is written, and obtaining a WriteOffset and a ReadOffset ; whether the shared memory is fully written once or not is judged; if yes, the difference value between the WriteOffset and the ReadOffset is compared, basic data information is obtained and written into the address position of the WriteOffset, and otherwise, basic data information of IO to be written is obtained and written into the address position of the WriteOffset; after IO writing is completed, IO is controlled to be written into the standby storage device, data backup is achieved. It can be guaranteed that the IO writing performance of the virtual machine is not affected during CDP backup, and the problem of IO data inconsistency caused by abnormal power failure can be avoided.

Description

technical field [0001] The invention belongs to the technical field of data backup, and in particular relates to a data backup method and system based on a continuous data protection (CDP) protocol. Background technique [0002] With the popularization and maturity of cloud computing technology, more and more governments, enterprises, and scientific research institutions deploy information assets to the cloud. After information assets are migrated to the cloud, enterprise data assets are also migrated to the cloud along with the application. How to ensure that data is not lost has become one of the first considerations for enterprises. In addition to the commonly used periodic backup technology, continuous data protection (Continuous Data Protection, CDP) technology is also widely used in the field of data backup. For example, the publication number is CN106547641B, and the patent name is a volume-based CDP backup method patent, which proposes to use the Volume filter driv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
CPCG06F11/1448G06F11/1458
Inventor 刘海伟
Owner 济南浪潮数据技术有限公司
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