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This letter presents a novel construction of $(n,k,d=n-1)$ access-optimal regenerating codes for an arbitrary sub-packetization level $\alpha $ for exact repair of any systematic node. We refer to these codes as general sub-packetized, because we provide an algorithm for constructing codes for any $\alpha $ less than or equal to $\vphantom {^{\int ^\int }}r^{\lceil ({k}/{r}) \rceil }$ , where...
Given the scale of today's distributed storage systems, the failure of an individual node is a common phenomenon. Various metrics have been proposed to measure the efficacy of the repair of a failed node, such as the amount of data download needed to repair (also known as the repair bandwidth), the amount of data accessed at the helper nodes, and the number of helper nodes contacted. Clearly, the...
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