Architectures and Algorithms to Exploit Probe-Based Storage

旋转磁记录的存储密度接近其理论最大值。 基于磁探针的技术通过使用诸如正交记录之类的技术来避免这些限制，这些技术有望在未来五到十年内实现非常高密度的存储。 基于探针的存储设备承诺改善访问时间，巨大的潜在并行增益，和显着的存储密度。 然而，由于这些设备的独特特性，现有的文件系统体系结构和算法很可能是次优的。 通过重新审视这些基本结构的上下文中的探针为基础的storage，很可能是显着的性能增益可以achieved.The建议的工作包括基础研究在四个领域：模拟基于探针的存储设备，架构问题，如并行和缓存，存储分配和文件布局，和请求调度。 在重新审视这项新技术的这些基本问题时，这项研究创造了一个工作主体，将引领此类设备的二级存储系统的发展。 这项研究可能会导致更好地理解与基于探针的存储设备相关的实现细节，以提供一组可用于采用它们的系统实现的算法和结构。

The storage density of rotating magnetic recording is approaching itstheoretical maximum. Magnetic probe-based technology avoids these limitations by using techniques such as orthogonal recording which promise very high density storage within the next five to ten years. Probe-based storage devices promise improved access times, enormous potential parallelism gains, and remarkable storage densities. However, because of the unique characteristics of these devices there is a highprobability that existing file system architectures and algorithms will be suboptimal. By reexamining these basic structures in the context of probe-based storage, it is likely that significant performance gains can be achieved.The proposed work comprises fundamental research in four areas: simulation of probe-based storage devices, architectural issues such as parallelism and caching, storage allocation and file layout, and request scheduling. In reexamining these basic issues for this new technology, this research creates a body of work that will lead the way in the development of secondary storage systems for such devices. This research is likely to result in a better understanding of the implementation details associated with probe-based storage devices to provide a set of algorithms and structures that can be used in systems implementations employing them.