关键词: 云存储, 纠删码, 容错, 冗余备份

Abstract: It is a hot topic in the area of cloud computing how to guarantee data reliability in cloud storage systems. The copy backup technology is an important approach to guaranteeing data reliability. However, there are some disadvantages such as taking up too much disk space and having low saving efficiency. Erasure code can provide optimized data redundancy thereby preventing data loss. Applying erasure code properly can help improve space utilization ratios and acquire satisfactory data protection effects. It has been widely used in communications. This paper introduces erasure code to cloud storage systems to replace the copy backup strategy and improve the performance of cloud storage systems. Experiments show that the scheme can effectively improve data reliability and space utilization.

Key words: cloud storage, erasure codes, tolerant, redundant backup