负载平衡分数重复码
Load-Balanced Fractional Repetition Codes
摘要:
我们引入负载平衡分数重复(LBFR)码,这是分数重复(FR)码的加强。LBFR码具有额外的属性,即多个节点故障可以通过从任何其他节点下载不超过一个块来顺序修复。这允许更好地使用网络,并可以额外减少修复多个节点所需的磁盘读取次数。我们描述LBFR码的邻接图,并使用此特性,目前明确的结构LBFR码的存储容量可比现有的FR码。令人惊讶的是,在某些参数制度,我们的LBFR码的结构匹配的FR码的最佳结构的参数。
英文摘要:
We introduce load-balanced fractional repetition (LBFR) codes, which are a strengthening of fractional repetition (FR) codes. LBFR codes have the additional property that multiple node failures can be sequentially repaired by downloading no more than one block from any other node. This allows for better use of the network, and can additionally reduce the number of disk reads necessary to repair multiple nodes. We characterize LBFR codes in terms of their adjacency graphs, and use this characterization to present explicit constructions LBFR codes with storage capacity comparable existing FR codes. Surprisingly, in some parameter regimes, our constructions of LBFR codes match the parameters of the best constructions of FR codes.
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