An Efficient Piggybacking Design Framework with Sub-packetization l≤ r for All-Node Repair

05/19/2022

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by   Ke Wang, et al.

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Piggybacking design has been widely applied in distributed storage systems since it can greatly reduce the repair bandwidth with small sub-packetization. Compared with other existing erasure codes, piggybacking is more convenient to operate and the I/O cost is lower. In this paper, we propose a new efficient design which can further reduce the repair bandwidth with the sub-packetization l≤ r where r = n-k. Generally, we let l≤ 8. Compared with other analogous designs, our design has lower l and the value of l is more flexible. Moreover, our design can repair all nodes with small repair bandwidth. Therefore our piggybacking design is more feasible.