arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1203.2202cs.ITmath.IT
收藏

适用于分布式存储的低修复复杂度Exact-MSR码

Exact-MSR Codes for Distributed Storage with Low Repair Complexity

Hongmei Xie, Zhiyuan Yan

摘要:

本文提出了两种新的精确修复最小存储再生码。对于这两种构造,通过将GF(q)上的消息向量处理为线性化多项式并在扩展域GF(q^m)上对其求值来获得编码符号。对于我们的精确MSR码,数据修复不需要矩阵求逆,并且可以通过GF $(q)$上的加法和乘法以及使用正常基时的循环移位来实现。这两种构造分别假设基域为GF(q)(q>2)和GF(2)。与现有的精确MSR码的构造相比,只要$q$足够大,前一构造对任意码参数都有效。据我们所知,这是第一次构造具有任意码参数的精确MSR码。与现有的精确MSR码相比,虽然我们的精确MSR码的数据构造具有更高的复杂度,但数据修复的复杂度较低。因此,它们对于需要少量数据重建以及大量数据修复的应用程序很有吸引力。

英文摘要:

In this paper, we propose two new constructions of exact-repair minimum storage regenerating (exact-MSR) codes. For both constructions, the encoded symbols are obtained by treating the message vector over GF(q) as a linearized polynomial and evaluating it over an extension field GF(q^m). For our exact-MSR codes, data repair does not need matrix inversion, and can be implemented by additions and multiplications over GF$(q)$ as well as cyclic shifts when a normal basis is used. The two constructions assume a base field of GF(q) (q>2) and GF(2), respectively. In contrast to existing constructions of exact-MSR codes, the former construction works for arbitrary code parameters, provided that $q$ is large enough. This is the first construction of exact-MSR codes with arbitrary code parameters, to the best of our knowledge. In comparison to existing exact-MSR codes, while data construction of our exact-MSR codes has a higher complexity, the complexity of data repair is lower. Thus, they are attractive for applications that need a small number of data reconstructions along with a large number of data repairs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑