A Comprehensive Review on Blockchain Scalability

Matani, A.; Sahafi, A.; Broumandnia, A.

doi:10.22061/jecei.2023.9975.670

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	A Comprehensive Review on Blockchain Scalability
Journal of Electrical and Computer Engineering Innovations (JECEI)
مقاله 13، دوره 12، شماره 1، فروردین 2024، صفحه 187-216 اصل مقاله (1.87 M)
نوع مقاله: Review paper
شناسه دیجیتال (DOI): 10.22061/jecei.2023.9975.670
نویسندگان
A. Matani¹؛ A. Sahafi^* ²؛ A. Broumandnia³
¹Computer Engineering Department, South Tehran Branch, Islamic Azad University, Tehran, Iran.
²Department of Computer Engineering, South Tehran Branch Islamic Azad University, Tehran, Iran.
³Department of Computer Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran.
تاریخ دریافت: 08 مرداد 1402، تاریخ بازنگری: 13 مهر 1402، تاریخ پذیرش: 14 آبان 1402
چکیده
Background and Objectives: Blockchain technology as a distributed and tamper-proof data ledger is attracting more and more attention from various fields around the world. Due to the continuously growing of the blockchain in both transaction data and the number of nodes joining the network, scalability emerges as a challenging issue. Methods: In this survey, the existing scalability solutions in the blockchain are discussed under five categories including on-chain scalability, off-chain scalability, scalable consensus mechanisms, DAG-based scalability, and horizontal scalability through sharding. Meanwhile, the novelties they have created on the fundamental layers of the blockchain architecture are investigated. Results: As a result, the advantages and disadvantages of the discussed mechanisms are pointed out, and a comparison between them in terms of different scalability metrics such as throughput, latency, bandwidth, and storage usage is presented. Therefore, this study provides a comprehensive understanding of the various aspects of blockchain scalability and the available scalability solutions. Finally, the research directions and open issues in each category are argued to motivate further improvement efforts for blockchain scalability in the future. Conclusion: Scalability allows blockchain system to sustain its performance as it grows up. Lack of scalability has a negative effect on the mass adoption of the blockchain in practical environments. This paper presents a profound analysis of the existing scalability solutions, the issues and challenges they address, and the ones that are not resolved yet. Consequently, it inspires novel ideas for more scalable and efficient blockchains in the future.
کلیدواژه‌ها
Blockchain؛ Scalability؛ Consensus؛ Sharding؛ Throughput

مراجع
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A Comprehensive Review on Blockchain Scalability