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- W3213761738 abstract "While many researchers adopt a sharding approach to design scaling blockchains, few works have studied the transaction placement problem incurred by sharding protocols. The widely-used hashing placement algorithm renders an overwhelming portion of transactions as cross-shard. In this paper, we analyze the high cost of cross-shard transactions and reveal that most Bitcoin transactions have simple dependencies and can become single-shard under a placement algorithm taking transaction dependencies into account. In addition, we perform a case study of OptChain, which is the state-of-the-art transaction placement algorithm for sharded blockchains, and find a shortcoming of it. A simple fix is proposed, and our evaluation results demonstrate that the proposed fix effectively helps OptChain overcome the shortcoming and significantly improve the system performance under a special workload. The authors of OptChain made some revisions to the algorithm description after noticing our work. Their updated algorithm does not exhibit the shortcoming under the workloads employed by this paper." @default.
- W3213761738 created "2021-11-22" @default.
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- W3213761738 date "2021-09-15" @default.
- W3213761738 modified "2023-09-23" @default.
- W3213761738 title "Transaction Placement in Sharded Blockchains" @default.
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- W3213761738 doi "https://doi.org/10.48550/arxiv.2109.07670" @default.
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