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arXiv · 2406.19836

BinomialHash: A Constant Time, Minimal Memory Consistent Hash Algorithm

Massimo Coluzzi·Amos Brocco·Alessandro Antonucci·Tiziano Leidi
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Abstract

Consistent hashing is a technique for distributing data across a network of nodes in a way that minimizes reorganization when nodes join or leave the network. It is extensively applied in modern distributed systems as a fundamental mechanism for routing and data placement. Similarly, distributed storage systems rely on consistent hashing for scalable and fault-tolerant data partitioning. This paper introduces BinomialHash, a consistent hashing algorithm that executes in constant time and requires minimal memory. We provide a detailed explanation of the algorithm, present a pseudo-code implementation, and formally establish its strong theoretical guarantees. Finally, we compare its performance against state-of-the-art constant-time consistent hashing algorithms, demonstrating that our solution is both highly competitive and effective, while also validating the theoretical boundaries.

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Massimo Coluzzi, Amos Brocco, Alessandro Antonucci, Tiziano Leidi. 2024-06-28. BinomialHash: A Constant Time, Minimal Memory Consistent Hash Algorithm. https://arxiv.org/abs/2406.19836

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