Method and system for safely distributing and repairing data in multi-cloud storage environment, and medium

Abstract

The invention provides a method and system for safely distributing and repairing data in a multi-cloud storage environment, and a medium. The method comprises the following steps: a data distributionstep: distributing data information into a multi-cloud storage system; a data recovery step: when user data need to be accessed, adopting a data recovery technology to recover user original data according to obtained data fragments; and a data repair step: when certain public cloud data are damaged or inaccessible, using a data repair process to repair node data. The method for safely distributingand repairing the data in the multi-cloud storage environment provided by the invention has storage confidentiality, reliable redundancy, low storage cost, high repair security and low repair cost, and supports single-node damaged repair.

Description

technical field [0001] The present invention relates to the technical field of data processing, in particular to a method, system and medium for securely distributing and restoring data in a multi-cloud storage environment. Background technique [0002] With the development of Internet technology, the amount of data is increasing exponentially, and the era of massive data is coming. Traditional local storage solutions are difficult to meet the storage needs of users, and because cloud storage systems have lower storage and operation and maintenance costs, they are more widely promoted and applied. For example, many medical records, system information of large companies and financial consumption records of users are gradually transferred to the cloud platform. At the same time, on the one hand, since there are many cloud storage service providers to choose from and each has its own characteristics, it will also bring expensive costs when users change cloud storage providers;...

AI Technical Summary

Problems solved by technology

[0012] Disadvantages of background technology 1: The confidentiality and availability of data in multi-cloud storage systems are protected to a certain extent by using technology-threshold coding method, but this technology does not make full use of the diversity of properties of different storage nodes in multi-cloud systems for asymmetrical For example, the different storage characteristics of private cloud and public cloud, as well as the service differences between different public cloud service providers, the performance of these multi-cloud systems cannot achieve optimal reliability and confidentiality at the same time.

[0018] Disadvantages of background technology 3: using technology 3 to utilize the repair characteristics of regeneration codes can ensure lower repair bandwidth, reduce repair costs, and achieve the same fault tolerance rate as ordinary MDS codes (such as RAID-6)

On the one hand, an additional proxy server is needed for data restoration, and the maintenance cost is high; on the other hand, this system is mainly aimed at solving the problem of restoration cost and cost, without considering the safety of the restoration process

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