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Advanced commands and distributed data layout to enhance the SSD internal parallelism

机译:高级命令和分布式数据布局以增强SSD内部并行性

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SSDs have been widely deployed in different areas and become competitive storage devices even for data-intensive applications. They have important performance and endurance requirements and their internal features provide a real potential to fulfil them. The multiple and independent SSD internal components allow parallel access to data at each of the four levels (package-chip-die-plane) but it relies completely on the data layout scheme. We proposed a data layout algorithm based only on the SSD basic operations. It distributes data up to the lowest level to exploit the fine grain internal parallelism and improves the SSD performance. In this paper, we also use advanced commands available on newer SSDs and request scheduling in combination with data layout scheme to provide up to the planes parallelism, taking into account both performance and endurance. The result is a new data layout algorithn to exploit the fine grain SSD internal parallelism. It respects the rules imposed by the wise use of advanced commands and the recommandations of maintaining a wide data distribution. The results show an improvement of performance and a Write Amplification (WA) factor very close to the one using basic operations which indicates a preserved endurance.
机译:SSD已广泛部署在不同的区域,即使对于数据密集型应用,也成为竞争存储设备。它们具有重要的性能和耐力要求,其内部特征提供了实现它们的实际潜力。多个和独立的SSD内部组件允许并行访问四个级别中的每一个(包装芯片模平面)的数据,但它完全依赖于数据布局方案。我们提出了仅基于SSD基本操作的数据布局算法。它将数据分发给最低级别以利用细粒型内部并行性并提高SSD性能。在本文中,我们还在较新的SSD上使用了高级命令,并与数据布局方案的请求调度,以提供到平面并行,同时考虑到性能和耐力。结果是一种新的数据布局算法,用于利用细粒度SSD内部并行性。它尊重明智使用高级命令的规则以及维护广泛数据分发的建议。结果表明,性能的改善和写入放大(WA)因子非常接近使用基本操作,这表示保留的耐久性。

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