Method and device for realizing data synchronism of long-distance duplication system

A technology of system data and remote replication, which is applied in the field of remote replication system data synchronization, can solve the problems of slow speed and low synchronization efficiency, and achieve the effect of ensuring consistency and solving data out of synchronization

Inactive Publication Date: 2012-10-31
INSPUR BEIJING ELECTRONICS INFORMATION IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the large amount of disk bitmap information, it is very slow to compare operations one by one, so its synchronization efficiency is low

Method used

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  • Method and device for realizing data synchronism of long-distance duplication system
  • Method and device for realizing data synchronism of long-distance duplication system
  • Method and device for realizing data synchronism of long-distance duplication system

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Embodiment Construction

[0041] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. It should be understood that the following examples are only used to illustrate and explain the present invention, but not to limit the technical solution of the present invention.

[0042] The embodiment of the method for realizing data synchronization in the remote replication system of the present invention relates to the primary storage device and the backup storage device in the remote replication system, including:

[0043] The primary storage device detects that the network connection with the backup storage device is abnormal, and records the rewritten data of the mirror volume; after the network connection returns to normal, the recorded rewritten data is synchronized to the corresponding mirror volume of the backup storage device.

[0044] figure 2 An example of the write operation of the main storage dev...

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Abstract

The invention provides a method and device for realizing data synchronism of a long-distance duplication system. The method comprises the following of: when a main storage device detects that network connection between the main storage device and a standby storage device is abnormal, recording data rewritten by mirrored volume generation data; and after the network connection is recovered to be normal, synchronizing the rewritten data to a corresponding mirror volume of the standby storage device. According to the method and the device disclosed by the invention, bitmap identification information is change only if the main storage device detects that the network connection between the devices is abnormal, so that the problem that the data between a main storage mirrored volume and a standby storage mirrored volume is not synchronized, caused by network failures in the long-distance duplication system, can be effectively solved; and therefore, the consistency of the data on the main storage device and the standby storage device is ensured.

Description

technical field [0001] The invention relates to network storage technology, in particular to a method and device for realizing data synchronization of a remote replication system. Background technique [0002] In order to solve the problem of data security in the network storage system, the remote replication technology is introduced, that is, the data on the mirror volume of the local primary storage device is synchronized to the mirror volume of the backup storage device in a different place through the IP network, such as figure 1 shown. When the local storage device loses data, the data can be recovered from the off-site backup storage device, thus ensuring the high reliability of the storage device data. [0003] In the remote replication technology, when the network fails between the two storage devices serving as the mirror function, when the data write operation occurs on the mirror volume of the primary storage device, the data cannot be updated synchronously to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08
Inventor 张延枫张宇
Owner INSPUR BEIJING ELECTRONICS INFORMATION IND
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