A Parallel Execution Model for Permissioned Blockchain Systems

Abstract

At present, academics have researched the directions that may become performance bottlenecks in blockchain systems, such as consensus protocols, encryption algorithms and contract execution. For example, in recent years, many improvements to consensus protocols have greatly improved the throughput of blockchain systems. However, the bottleneck of blockchain smart contract execution has not been well solved. Currently, the miner-validator architecture based on serial contract execution limits the throughput of smart contract execution to a great extent. This paper proposes a new smart contract parallel execution architecture, which migrates the concurrency control methods used in mature databases to the blockchain. The test of Ethereum data and a benchmark specifically for blockchain show that its throughput is greatly improved compared with the traditional serial execution mode.