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We present a power-efficient scheme for erasure-coded storage clusters---ECS<sup>2</sup>---which aims to offer high energy efficiency with marginal reliability degradation. ECS<sup>2</sup> utilizes data redundancies and deferred writes to conserve energy. In ECS<sup>2</sup> parity blocks are buffered exclusively in active data nodes whereas parity nodes are(More)
In this paper, we propose a multi-level fault-tolerant storage cluster called MFTS, which provides flexible reliability for a wide variety of applications. MFTS makes use of a reliability upper-bound (i.e., Parameter r) to guide the process of adjusting fault-tolerance levels, i.e., i-erasure(s) and i {1, 2, .. ., r}. In particular, MFTS can map an(More)
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