区块链系统的数据存储与查询技术综述 (Survey of Data Storage and Query Techniques in Blockchain Systems)

Qiange Wang, Pu He, Tiezheng Nie, Derong Shen, Ge Yu

Abstract: At present,blockchain systems,represented by Bitcoin and Ethereum,are becoming more and more mature,and blockchain technology has become a hot topic in academic and industrial circles.However,in practical applications,these systems are generally faced with tough problems such as simple query function and low query performance due to the limitation of data storage scheme.This paper presented the survey and prospect of the research progress on data storage and query technology of blockchain systems.First,the data storage mechanism and query processing strategy used in current popular blockchain systems were introduced .Then,two methods of extending query processing functions on the existing system were introduced in details.The features of their query efficiency,write performance optimization,storage space occupancy,data security and availability were compared and analyzed in detail.Finally,the trend of the query technology development in the future block chain system was analyzed,and the main research direction was discussed and explored.