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arXiv 1207.0879cs.ITmath.IT
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分布式存储中具有最小修复带宽的精确合作再生码

Exact Cooperative Regenerating Codes with Minimum-Repair-Bandwidth for Distributed Storage

Anyu Wang, Zhifang Zhang

摘要:

在最小带宽协作再生点上给出了精确协作再生码的一个显式构造。在本文之前,唯一已知的显式MBCR码给出参数$n=d+r$和$d=k$,而我们的构造适用于所有可能的值的$n,k,d,r$。该程序具有简洁的多项式形式的表达式,数据重构采用二元多项式插值实现。它是一种标量码,在大小为$q\geq n$的有限域上操作。此外,我们建立了线性精确MBCR码的几个子空间性质。基于这些性质,我们证明了线性精确MBCR码不能实现转移修复。

英文摘要:

We give an explicit construction of exact cooperative regenerating codes at the MBCR (minimum bandwidth cooperative regeneration) point. Before the paper, the only known explicit MBCR code is given with parameters $n=d+r$ and $d=k$, while our construction applies to all possible values of $n,k,d,r$. The code has a brief expression in the polynomial form and the data reconstruction is accomplished by bivariate polynomial interpolation. It is a scalar code and operates over a finite field of size $q\geq n$. Besides, we establish several subspace properties for linear exact MBCR codes. Based on these properties we prove that linear exact MBCR codes cannot achieve repair-by-transfer.

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。

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