Logical volume rapid synchronization method based on data differentia

A data discrepancy and logical volume technology, which is applied in the redundancy of operations for data error detection, electrical digital data processing, special data processing applications, etc., can solve the problem of reducing the amount of synchronized data, inconsistent source volume data, reducing data Compare the scope and other issues to achieve the effect of reducing the amount of data and reducing the scope
CN101387976AInactive Publication Date: 2009-03-18TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2009-03-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a rapid synchronization method of logical volumes based on data difference, which belongs to the technical field of computer data storage. The method comprises steps of finding out used data blocks on each logical volumes according to file system information of source volumes and destination volumes, comparing corresponding data block pairs on the source logical volumes and the destination logical volumes, then computing two eigenvalues of a data block pair, synchronizing the data block pair if the two eigenvalues are varied, or not synchronizing if not. The invention only compares the used data blocks in case of data synchronization, thereby obviously reducing the range of data comparison, and simultaneously only the changed data blocks are synchronized during synchronization, thereby effectively reducing the quantity of synchronized data.
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Description

technical field

[0001] The invention belongs to the technical field of computer data storage, and mainly solves the problem of quickly synchronizing the data of the source volume and the target volume when the data of the source volume and the target volume are inconsistent in a continuous data protection system to make the data consistent again. Background technique

[0002] Nowadays, computers are becoming more and more important to individuals, enterprises and governments, especially important data stored in computers. Once these data are lost or destroyed, the loss will be difficult to estimate. Existing data protection technologies, such as RAID , remote mirroring, volume shadow copy service, snapshot, etc., can be divided into physical block level, logical volume level, file level or application level from the implementation level. Among them, data protection at the logical volume level has the advantages of being independent of upper-layer applications and specific ph...

Claims

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