arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0910.2245cs.ITmath.IT
收藏

寻找最小存储再生码

Searching for Minimum Storage Regenerating Codes

Daniel Cullina, Alexandros G. Dimakis, Tracey Ho

摘要:

再生代码允许分布式存储系统从存储节点的丢失中恢复,同时通过网络传输尽可能少的数据量。我们提出了一个系统的计算机搜索最佳的系统再生码。为了搜索潜在码的空间,我们以几种方式减小潜在搜索空间。我们施加一个额外的对称性条件,我们考虑的代码。我们指定的代码在一个简单的替代方式,使用额外的恢复系数,而不是传输系数和代码的等价类,以避免冗余检查。我们的主要发现是几个有限域上的最优系统最小存储再生码的$n=5$和$k=3$。没有这样的代码是以前已知的信息理论割集界的匹配是一个开放的问题。

英文摘要:

Regenerating codes allow distributed storage systems to recover from the loss of a storage node while transmitting the minimum possible amount of data across the network. We present a systematic computer search for optimal systematic regenerating codes. To search the space of potential codes, we reduce the potential search space in several ways. We impose an additional symmetry condition on codes that we consider. We specify codes in a simple alternative way, using additional recovered coefficients rather than transmission coefficients and place codes into equivalence classes to avoid redundant checking. Our main finding is a few optimal systematic minimum storage regenerating codes for $n=5$ and $k=3$, over several finite fields. No such codes were previously known and the matching of the information theoretic cut-set bound was an open problem.

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。

↑