Operating Permissioned Blockchain in Clouds: A Performance Study of Hyperledger Sawtooth

With ever more IoT (Internet of Things) and bigdata applications, the emerging blockchaintechniques provide fundamental supports to credibly track the transactions of digital assets. Public blockchains, e.g., bitcoin, are often energy-consuming and low efficient. Therefore, an empirical study of operating permissioned blockchainsin clouds is urgently needed. In this paper, we study the performance of Sawtooth, a well-known permissioned blockchainplatforms from Hyperledger, in cloud environments. Our results provide insights for blockchainoperators to optimize the performance of Sawtooth through adjusting the two configuration parameters, i.e., Scheduler and Maximum Batches Per Block. Our approach can be used to test other blockchainplatforms.