Architectures and Algorithms to Exploit Probe-Based Storage

旋转磁记录的存储密度正接近其理论最大值。基于磁探头的技术通过使用正交记录等技术避免了这些限制，这些技术承诺在未来五到十年内实现非常高的密度存储。基于探测的存储设备承诺改善访问时间、巨大的潜在并行度收益和显著的存储密度。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不是最优的。通过在基于探测的存储环境中重新研究这些基本结构，可能会获得显著的性能提升。建议的工作包括四个方面的基础研究：基于探测的存储设备的模拟、并行性和缓存等体系结构问题、存储分配和文件布局以及请求调度。在重新研究这项新技术的这些基本问题时，这项研究创建了一系列工作，将引领此类设备的辅助存储系统的开发。该研究可能导致更好地理解与基于探测的存储设备相关联的实现细节，以提供可在使用它们的系统实现中使用的一组算法和结构。

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.