计算机科学 ›› 2020, Vol. 47 ›› Issue (6A): 305-309.doi: 10.11896/JsJkx.190600063
王雪冰
WANG Xue-bing
摘要: 参数为(n,k,B,d,t)的功能性修复最小存储再生码采用(n,k)删除码策略,依靠d个帮助节点修复t个节点的失效。出于存储空间、修复带宽、可修复节点数等因素的考虑,需要将一个参数为(n1,k1,B,d1,t1)的功能性修复再生码转换为另一个参数为(n2,k2,B,d2,t2)的功能性修复再生码,并且希望这个转换过程能够以最小下载数据量的代价进行。针对此问题,采用逻辑节点和物理节点相结合的方法,构造了一种可变参数的功能性修复再生码,证明了该码可以在不同参数组之间相互转换,而且在转换过程中使用最小下载数据量。
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