Non-homogeneous two-rack model for distributed storage systems
Non-homogeneous two-rack model for distributed storage systems
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DOI：
10.1109/isit.2013.6620424
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
J. Pernas;C. Yuen;Bernat Gastón;J. Pujol
中科院分区：
文献类型：
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作者：
J. Pernas;C. Yuen;Bernat Gastón;J. Pujol
在传统的两机架分布式存储系统（DSS）模型中，由于假设每个节点的存储容量相同，最小带宽再生（MBR）点变得不可行。在本文中，我们设计了一个新的非齐次两机架模型，提出了一个推广的阈值函数用于计算的权衡曲线。我们证明，通过具有更高的再生带宽的机架中的节点存储更多的信息，所有的点上的权衡曲线，包括MBR点，成为可行的。最后，我们展示了非均匀的两个机架模型优于传统的模型，在每个节点的存储和修复带宽之间的权衡曲线。
In the traditional two-rack distributed storage system (DSS) model, due to the assumption that the storage capacity of each node is the same, the minimum bandwidth regenerating (MBR) point becomes infeasible. In this paper, we design a new non-homogeneous two-rack model by proposing a generalization of the threshold function used to compute the tradeoff curve. We prove that by having the nodes in the rack with higher regenerating bandwidth stores more information, all the points on the tradeoff curve, including the MBR point, become feasible. Finally, we show how the non-homogeneous two-rack model outperforms the traditional model in the tradeoff curve between the storage per node and the repair bandwidth.