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      CloudChain: A Cloud Blockchain Using Shared Memory Consensus and RDMA

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          Abstract

          Blockchain technologies can enable secure computing environments among mistrusting parties. Permissioned blockchains are particularly enlightened by companies, enterprises, and government agencies due to their efficiency, customizability, and governance-friendly features. Obviously, seamlessly fusing blockchain and cloud computing can significantly benefit permissioned blockchains; nevertheless, most blockchains implemented on clouds are originally designed for loosely-coupled networks where nodes communicate asynchronously, failing to take advantages of the closely-coupled nature of cloud servers. In this paper, we propose an innovative cloud-oriented blockchain -- CloudChain, which is a modularized three-layer system composed of the network layer, consensus layer, and blockchain layer. CloudChain is based on a shared-memory model where nodes communicate synchronously by direct memory accesses. We realize the shared-memory model with the Remote Direct Memory Access technology, based on which we propose a shared-memory consensus algorithm to ensure presistence and liveness, the two crucial blockchain security properties countering Byzantine nodes. We also implement a CloudChain prototype based on a RoCEv2-based testbed to experimentally validate our design, and the results verify the feasibility and efficiency of CloudChain.

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          Author and article information

          Journal
          08 June 2021
          Article
          2106.04122
          55717581-923f-48ba-95e1-37a8ee0fb13b

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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          Custom metadata
          12 pages, 8 figures, journal paper
          cs.DC

          Networking & Internet architecture
          Networking & Internet architecture

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