计算机工程与应用2017，Vol.53Issue(24)：1-7,22,8.DOI:10.3778/j.issn.1002-8331.1710-0229
去中心化的分布式存储模型
Decentralized model for distributed storage system
摘要
Abstract
In the distributed storage systems, the metadata stored on the central node, which is prone to a single point of failure and is easily modified by malicious ones. Although the problem can be avoided to some extent by using backup nodes, the synchronization and handover between the nodes are less efficient. At the same time, nodes that store metadata can agree on modifying metadata, which is lacking credibility. For the problems of distributed storage system, a decentral-ized data storage model is proposed, namely DMB(Decentralized Metadata Blockchain), which combines with the charac-teristics of blockchain. The DMB model guarantees metadata integrity by saving metadata in blocks, redundant storage for blockchain, and collaboration validation. The model is divided into two phases which are storage phase and verifica-tion phase. In the storage phase, the model sends the user's signature and locations of data to verification nodes, and uses the signature and data locations to generate metadata block. In the verification phase, the verification nodes check whether the local and global states of the metadata block chain are the same. If they are not the same, the DMB model performs the synchronization of the state, and then the verification nodes retrieve local the metadata blockchain to verify the integrity of metadata. The theoretical and experimental results show that the DMB model can guarantee the retrievability and possession of the metadata, and has better concurrent processing ability, which has little effect on the efficiency of the data stored.关键词
区块链/去中心化/分布式存储/元数据Key words
blockchain/decentration/distributed storage/metadata分类
信息技术与安全科学引用本文复制引用
郝琨,信俊昌,黄达,王国仁..去中心化的分布式存储模型[J].计算机工程与应用,2017,53(24):1-7,22,8.基金项目
国家自然科学基金(No.61472069,No.61402089) （No.61472069,No.61402089）
中央高校基本科研业务费专项资金(No.161602003) （No.161602003）
辽宁省自然科学基金(No.2015020553). （No.2015020553）
