Method for protecting remote backup equipment of temporary abnormity by continuous data protective system
A technology of remote backup and data protection, which is applied to redundancy in computing for data error detection, memory systems, electrical digital data processing, etc., to achieve strong versatility and solve the effect of data loss.
Inactive Publication Date: 2010-06-02
BEIJING WISDATA SYST +1
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[0005] The purpose of the present invention is to solve the problem that the continuous data protection system can not lose the captured data changes when the remote backup equipment is temporarily abnormal, and propose a protection method for the continuous data protection system when the remote backup equipment is temporarily abnormal
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[0025] The method for caching and effectively organizing the changed data locally in the case of a temporary abnormality of the remote backup device proposed by the present invention is further described in conjunction with the accompanying drawings and embodiments as follows:
[0026] The method process of the present invention is as figure 1 shown, including the following steps:
[0027] 1) Judging the write operation of the protected volume: judging the request packet of the write operation of the protected volume from the I / O request packet sent from the file system driver layer to the disk driver layer, and extracting the write data and storage address in the request packet;
[0028] 2) Write data copy: Create a new write request package (IRP, I / O request Package), put the content extracted in step 1) into the newly created write request package, and then copy the newly created write request The packet is placed in the waiting queue;
[0029] 3) Perform different operat...
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The invention relates to a protection method for a continuous data protection system when a remote backup device is temporarily abnormal, belonging to the technical field of computer data storage. Themethod includes judging the write operation of a protected volume, reproducing write data and according to current working condition, conducting local cache or remote transmission on a created writerequest packet; caching the received write request packet first in a memory and writing the cached request packet in the memory into a local disk when the cached request packets reach a preset quantity; if transmission fails, the operating condition of the remote backup device is regularly checked. The method is applicable to realizing a block-level continuous data protection system. If the remotebackup device operates abnormally when the system sends change data to the backup device by the network, the method can be adopted to ensure the continuously changed data contents not to be lost, thus providing a guarantee for the data recovery of any point of the continuous data protection system.
Description
technical field [0001] The invention belongs to the technical field of computer data storage, and mainly solves the problem that when the remote data backup equipment in the continuous data protection system is abnormal, the protected system cannot send its own changed data content to the remote backup through the network in time. Background technique [0002] Continuous data protection is a data protection technology for continuous time points. Its fundamental function is to complete fault recovery at any time point at the moment of failure, and fundamentally solve the inherent weaknesses of low recovery capabilities and non-fine time strategies in traditional backup. The continuous data protection system can capture all data changes of the protected system and provide data changes that record the state of all historical data. For example, if the data at the same physical address changes 10 times, the continuous data protection system will record all the 10 data changes and...
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IPC IPC(8): G06F11/14G06F12/00
Inventor 鞠秀芳生拥宏刘宏鞠大鹏徐学雷汪东升李泓
Owner BEIJING WISDATA SYST