With the surge in cloud storage adoption, enterprises face challenges managing data duplication and exponential data growth. Deduplication mitigates redundancy, yet maintaining redundancy ensures high availability, incurring storage costs. Balancing these aspects is a significant research concern. We propose FASTEN, a distributed cloud storage scheme ensuring efficiency, security, and high availability. FASTEN achieves fault tolerance by dispersing data subsets optimally across servers and maintains redundancy for high availability. Experimental results show FASTEN's effectiveness in fault tolerance, cost reduction, batch auditing, and file and block-level deduplication. It outperforms existing systems with low time complexity, strong fault tolerance, and commendable deduplication performance.

翻译：随着云存储应用的激增，企业在管理数据重复和指数级数据增长方面面临挑战。去重技术可减少冗余，但维持冗余又能确保高可用性，这会产生存储成本。如何平衡这两方面是一个重要的研究问题。我们提出FASTEN，一种确保高效性、安全性和高可用性的分布式云存储方案。FASTEN通过将数据子集最优地分散到多个服务器来实现容错，并维持冗余以保证高可用性。实验结果表明，FASTEN在容错、成本降低、批量审计以及文件和块级去重方面具有显著效果。与现有系统相比，它在低时间复杂度、强容错性和可观的去重性能方面表现更优。