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

A technology for safe distribution and repair methods, applied in the field of data processing, can solve problems such as high maintenance cost, reduced repair cost, and failure to consider the safety of the repair process, and achieve high repair safety, low repair cost, and reliable redundancy.

Active Publication Date: 2018-11-13
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
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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

Method used

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

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Embodiment 1

[0083] Due to the different types of files stored in the multi-cloud storage system, the requirements for storage confidentiality or access cost are quite different. Under the premise of meeting the above threshold parameter conditions, this method adjusts the parameters appropriately so that the method is suitable for the storage requirements of different files. The data files stored in the system may be file types with high access frequency, or some kind of static files, and their storage time is T stor longer. The following mainly analyzes the method parameter settings of static files in actual storage scenarios.

[0084] In this scenario, it is assumed that r=5, that is, there are 5 public cloud servers. There are two requirements for static file storage.

[0085] (1) Improve repair security. Prevent unauthorized users from forging data repair requests to repair each data fragment one by one and crack user data during the long storage period of files. Therefore, it is...

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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;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L29/06G06F11/14
CPCG06F11/1402H04L63/0428H04L67/1097
Inventor 李大刚孙书豪周颖
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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