Self-Regulated Adaptive Data Distribution for Redundant and Scalable Blockchain Storage

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Abstract

Collaborative blockchain storage is one of the solutions to the blockchain storage scalability challenge, allowing individual nodes to store partial blockchain data. Collaborative blockchains give up redundancy for scalability. However, redundancy is a determinant of blockchain’s decentralization and data availability. In this article, we study the possibility of balancing the scalability–redundancy tradeoff in collaborative blockchains. We first present a model for the evaluation of a data distribution scheme for its efficiency in terms of redundancy. Then, we present a fully decentralized self-regulated data distribution scheme assuring storage scalability and redundancy for collaborative blockchains based on fully redundant global state. The proposed solution does not incur additional communication. We examine the efficiency of the proposed scheme based on experiments. Our results demonstrate that the proposed system assures a level of redundancy for a given set of nodes and data volume, optimizes storage space utilization, and provides uniform distribution of data.

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