Journal
PERVASIVE AND MOBILE COMPUTING
Volume 59, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.pmcj.2019.101055
Keywords
Blockchain; Scalability; State sharding; Transaction sharding
Funding
- National Key Research and Development Program [2016YFB1000101]
- National Natural Science Foundation of China [61379052]
- Science Foundation of Ministry of Education of China [2018A02002]
- Natural Science Foundation for Distinguished Young Scholars of Hunan Province [14JJ1026]
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Blockchain, known as distributed ledger technology, suffers from the scalability problem. A major approach to overcoming this limitation is using sharding, which divides the network into multiple smaller groups, called shards, these shards can work in parallel on disjoint transactions and maintain disjoint ledgers. Existing sharding-based protocols rely on reshuffling scheme to maintain security, however, since each shard only maintains a disjoint ledger, reshuffling the network will cause huge data migration. In this work, we propose SSChain, a novel non-reshuffling structure that supports both transaction sharding and state sharding. Our empirical evaluations suggest that SSChain can process more than 6,500 TPS in a network of 1,800 nodes without any data migration overhead. (C) 2019 Elsevier B.V. All rights reserved.
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