Improving Long-term File System Read Performance 1 Abstract

The goal of this project is to propose improvements in long-term disk read performance for large-scale high-end storage systems. To accomplish this goal, we first describe access patterns in long-term data. Based on these patterns and current hardware trends, we argue that disk read performance will become increasingly important to overall file system performance. To address this issue, we develop a new layout policy and demonstrate that it improves read performance over other commonly used layout policies. Finally, we discuss trends in high-end storage systems and how the file system-storage system interface can be improved based on the observed access patterns.