Blockchain storage middleware based on external database

Abstract

Because of the anti-tampering, decentralization, anonymous transaction, and other characteristics of the blockchain, it is considered to be a technology that can bring huge changes to the Internet field, especially the financial Internet. As a huge distributed ledger, the blockchain has obvious deficiencies in query processing module design and client query performance. In addition, the current blockchain storage engine cannot provide version control and multi-person collaboration functions. This article proposes to solve the problem of query performance and query semantics not rich by linking other databases, the version control function is realized by separately designing the version control semantics, and the function of deleting the duplicate data by the Pos-tree can be effectively used to solve the problem of waste of storage space during version control. Experiments show that under normal network delay $(\lt 80$ ms), the middleware system proposed in this paper has a slight improvement in query performance, and can also save storage space as much as possible during version control.