Minimum Storage Partially Cooperative Regenerating Codes With Small Sub-Packetization
Yajuan Liu, Yanyan Wang, Han Cai, Xiaohu Tang · IEEE Transactions on Communications · 2023
The partially cooperative repair model is an available technology to deal with multiple node failures in a distributed storage system, which does not depend on the heavy assumption of exchanging data with all new nodes, increasing the flexibility of the system. In this paper, constructions and repair schemes for codes with minimum storage overhead and optimal repair bandwidth, i.e., minimum storage partially cooperative regenerating codes are proposed. These constructions show that the theoretic bound on the repair bandwidth of the partially cooperative repair model is tight for the minimum storage cases. Notably, these codes with optimal repair bandwidth may have smaller sub-packetization compared with the known codes for this model.