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Performance Measures for Distributed Storage

机译：分布式存储的性能措施

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A storage scheme is a cyclic strategy that coordinates a set of network-attached storage devices (SNAS). Using this type of procedures it is possible to achieve balance in time and space over the involved components. These solutions are oriented to save snapshots or global states of a distributed execution. Subsets of SNAS, called blocks, are cyclically scheduled in order to store the chunks that make up the last recorded snapshot. This revolving renovation procedure maintains a fixed amount of storage space. Afterwards, if a component crashes, all of the data stored in its corresponding blocks is useless, because no global state can be reconstructed. In this case, the information recorded in an earlier block can be used to recover a global state, provided there is at least one such block where no component has crashed. In this paper several such schemes are described and compared in terms of space cost and reliability measures. Although our solution was developed to support efficient global states recording, many storage applications, like web hosting or distributed databases, might profit from this distributed management procedure to provide highly available and reliable services.
机译：存储方案是一种循环策略，其协调一组网络附加的存储设备（SNAS）。使用这种类型的程序可以在涉及的组件上实现时间和空间的平衡。这些解决方案面向保存分布式执行的快照或全局状态。 SNAS的子集被称为块，循环定期计划，以便存储构成上次录制的快照的块。该旋转的翻新程序维持固定数量的存储空间。之后，如果组件崩溃，则存储在其对应块中的所有数据是无用的，因为可以重建任何全局状态。在这种情况下，记录在较早块中的信息可用于恢复全局状态，只要存在至少一个这样的块，其中没有组件崩溃。在本文中，在空间成本和可靠性措施方面描述了几种这样的方案。虽然我们的解决方案是为支持有效的全球状态录制，但许多存储应用程序，如Web托管或分布式数据库，可能会从此分布式管理程序中获利，以提供高度可用和可靠的服务。

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