Continuous data protection method based on jump recovery chain

A data protection and data block technology, which is applied to redundancy in operations for data error detection, electrical digital data processing, and response error generation. , poor write performance and other problems, to achieve the effect of solving rapid recovery, improving write performance and data recovery performance

Active Publication Date: 2021-05-04
HUANGHUAI UNIV
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Problems solved by technology

However, ST-CDP will generate additional snapshot maintenance overhead (such as the creation of snapshot storage area, pointer maintenance, etc.), the more snapshot points are inserted, the greater the overhead of snapshot maintenance
At the same time, this scheme does not take into account the problem of different write operation frequencies of different data blocks. For data blocks with more frequent write operations, the log chain between adjacent snapshots is longer, and for data blocks with infrequent write operations, the write operation It may be necessary to modify multiple snapshot pointers at the same time, and the write performance is poor

Method used

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  • Continuous data protection method based on jump recovery chain
  • Continuous data protection method based on jump recovery chain
  • Continuous data protection method based on jump recovery chain

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Embodiment Construction

[0094] A continuous data protection method based on skip recovery chains, such as Figure 1~7 As shown, wherein, the generation process of the jump recovery chain is:

[0095] First: the content in data block B is B T(0) ;

[0096] Then: at time T(m), there is a write operation request for data block B, and the content to be written is B T(m) , the system generates a pointer block R for the write operation request T(m) , then B T(0) is written to the backup area, and the content of data block B in the data area is updated to B at the same time T(m) , and put B T(0) Write the pointer block R at the address in the backup area T(m) The load field of m; the value of m is a positive integer greater than or equal to 0.

[0097] Then: at time T(m+1), T(m+2), ..., T(m+k), there is a write operation request for data block B, and the content to be written is respectively B T(m+1) , B T(m+2) ,...,B T(m+k) , then for each write request, the system will generate a check block, wr...

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Abstract

The invention relates to a continuous data protection method based on a jump recovery chain, which belongs to the technical field of computer storage and aims at reducing the data recovery time of continuous data protection and improving the performance of writing operation and data recovery. The algorithm includes a write operation algorithm and a data recovery algorithm, and adopts the jump recovery chain technology to ensure that the system can recover to any point in time before the failure in a short period of time without inserting a snapshot, that is, the data recovery time and recovery point time The span is irrelevant, effectively solving the problem of fast recovery of long-term data; at the same time, data buffering technology is used in the write operation algorithm and data recovery algorithm to improve the write operation performance and data recovery performance of the jump recovery chain.

Description

technical field [0001] The invention belongs to the technical field of computer storage, and in particular relates to a continuous data protection method based on a jump recovery chain. Background technique [0002] With the advancement of technology and the development of productivity, people rely more and more on data. Traditional data protection technologies such as periodic backups and snapshots can only restore data to a fixed point in time before a failure, and cannot completely avoid the possibility of data loss, making it difficult to meet the needs of high-continuity applications. [0003] Continuous data protection technology (Continuous Data Protection, CDP) can restore data to any point in time before the failure, completely avoiding the possibility of data loss, so it has become a research hotspot in the field of data protection in recent years. [0004] CDP technology captures every write operation of the application to the data block, that is, before each wri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14
CPCG06F11/1435G06F11/1464G06F11/1471
Inventor 杨天明孙伟张敬朱献文樊宜和杨奕
Owner HUANGHUAI UNIV
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