High Performance Integration of Advanced Tertiary Stores

必须解决处理器和I/O性能之间迅速增长的差距。 存储系统中的两个有趣的趋势是，新技术的出现会导致读写性能不对称，以及数据传输速率和访问时间之间的差距越来越大。 当前的例子是具有自动化库机制的第三存储系统。 这样一个系统的数据传输速率和访问时间之间的性能差距很大，由于机械媒体handling.The的目标，这项工作是通过开发高性能的自动化三级存储库集成技术来解决这些问题。 这些问题包括：1.解决读写性能不对称的问题，通过使用日志结构，写缓冲架构.当数据从本地存储器迁移时，通过在同一介质卷上预先分组相关数据，最大限度地减少机械访问延迟。这项研究将通过允许对巨大存储器的高性能访问，直接有益于当今不断增长的存储需求。 它解决了在数据速率远远超过访问速度的情况下减少延迟的重要问题。 它还通过缓解读写性能不对称的问题，使新兴存储技术（如磁光和体全息）的有效通用采用成为可能。

The rapidly growing disparity between processor and I/O performance must be addressed. Two intriguing trends in storage systems are the appearance of new technologies that suffer from asymmetric read-write performance, and the widening gap between data transfer rate and access time. A current example is a tertiary storage system with an automated library mechanism. Such a system exemplifies the wide performance gap between data transfer rate and access time due to mechanical media handling.The goal of this work is to address these issues through the development of techniques for high-performance integration of automated tertiary storage libraries. These issues include:1. Addressing the issue of read-write performance asymmetry, though the use of a log-structured, write-buffered architecture.2. The minimization of mechanical access delays, by pre-grouping related data on the same media volume, as it is migrated from local storage.This research will be of direct benefit to today's growing storage needs by allowing high-performance access to vast storage. It addresses the important issue of latency reduction in cases where data rate far exceeds access speeds. It also enables the efficient general-purpose adoption of emerging storage technologies, such as magneto-optical and volume holographic, by alleviating problems of read-write performance asymmetry.