High Performance Integration of Advanced Tertiary Stores

处理器和I/O性能之间迅速增长的差距必须得到解决。存储系统中有两个有趣的趋势，一是出现了读写性能不对称的新技术，二是数据传输速率和访问时间之间的差距越来越大。当前的一个例子是具有自动化库机制的三级存储系统。这种系统体现了由于机械介质处理导致的数据传输速率和访问时间之间的巨大性能差距。这项工作的目标是通过开发自动化三级存储库的高性能集成技术来解决这些问题。这些问题包括：1。通过使用日志结构、写缓冲架构，解决读写性能不对称的问题。当数据从本地存储迁移时，通过对同一介质卷上的相关数据进行预分组，将机械访问延迟最小化。这项研究将通过允许高性能访问大量存储，直接有利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。它还通过减轻读写性能不对称的问题，实现了新兴存储技术（如磁光和体全息）的高效通用采用。

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.