Increasing Storage Performance and Reliability with Magnetic RAM

该研究通过使用磁性RAM作为文件系统索引（元数据）和数据的永久存储，极大地提高了文件系统的性能和可靠性。 将元数据保存在MRAM中可将元数据操作的速度提高一个数量级以上，同时降低软件复杂性并提高完整性。 本研究也探讨动态记忆为基础的元数据管理算法，减少元数据的大小和复杂性，同时增加元数据的灵活性。 该研究探讨了不同的MRAM大小和性能特征对文件系统性能和文件系统算法选择的影响，使更高的文件系统性能和更高的可靠性成为可能，这项研究有几个深远的影响。 首先，文件系统性能的数量级改进极大地降低了文件服务器成本，使存储更经济实惠。 第二，通过使用基于内存的算法降低了代码复杂性，从而可以更快地开发更简单的文件服务器。 第三，通过降低代码复杂性和持续的完整性检查提高了可靠性，从而可以生产出更可靠的文件服务器。 该研究也适用于使用其他新兴非易失性存储器技术（如FeRAM和新型闪存）构建的系统。

The research dramatically improves file system performance and reliability by using Magnetic RAM as a permanent store for both file system indexes (metadata) and data. Keeping metadata in MRAM increases the speed of metadata operations by more than an order of magnitude while decreasing software complexity and improving integrity. This research also investigates dynamic memory-based algorithms for metadata management, reducing metadata size and complexity while increasing metadata flexibility. The research explores the effects of varying MRAM sizes and performance characteristics on file system performance and the choice of file system algorithms.The higher file system performance and higher reliability made possible by this research has several far-reaching impacts. First, file system performance improvements of an order of magnitude dramatically reduces file server costs, making storage more affordable. Second, the reduced code complexity enabled by the use of memory-based algorithms permits faster development of simpler file servers. Third, the increased reliability from lower code complexity and continuous integrity checking allows the production of much more reliable file servers. The research is also applicable to systems built with other emerging non-volatile memory technologies such as FeRAM and new types of Flash RAM.