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为了提高分布式云存储系统的存储可靠性和故障节点修复效率,提出一种基于最小存储再生码的局部性修复编码方案.具体地,构造适用于云存储的系统最小存储再生码,以此码为局部码构造局部性修复编码,确保最大距离可分性质和简单修复特性.性能分析和仿真结果表明,该局部性修复编码方案可实现云存储系统中多个故障节点的快速修复,具有较低的修复局部性,相对于三副本复制方式和简单再生码,该局部性修复编码方案在存储开销和修复带宽开销方面的性能更优.
In order to improve the storage reliability of distributed cloud storage system and repair efficiency of faulty nodes, a local repair coding scheme based on the minimum storage reclamation code is proposed.In particular, the minimum storage reclamation code of the system for cloud storage is constructed, The local repair codes are constructed for local codes to ensure the maximal separable properties and the simple repair features.The performance analysis and simulation results show that the local repair coding scheme can quickly repair multiple failed nodes in the cloud storage system with a lower , The local repair coding scheme has better performance in terms of memory overhead and repair bandwidth overhead compared to the three-copy mode and simple regenerative code.