A Cooperative Repair Scheme for MSR Codes with Two Erasures and Small Finite Field
Yajuan Liu, Han Cai, Xiaohu Tang · 2023
In large-scale distributed storage systems, the repair bandwidth, i.e., the amount of data downloaded for failures, is one of the most important factors that determines the performance of the system. In this paper, we design a novel cooperative repair scheme, specifically, for Zigzag MSR codes with optimal repair bandwidth, enabling the repair of any$h=2$failed nodes. To the best of our knowledge, this is the first cooperative repair scheme for Zigzag MSR codes. In contrast to the previous cooperative repair MSR codes, our scheme extremely reduces the size of finite field to$\mathbb{F}_{q} \leq n+1$.