Performance Optimization on a RAID System: Design and Implementation of a Fast Indexing Table for Disk Caching
| Autor: | Jia-Siang Chen, 陳嘉翔 |
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| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 As the performance gap between processors and disks continues to increase, cache memory and Redundant Array of Inexpensive Disks (RAID) have been introduced to narrow the gap and increase the throughput of a storage system. While RAID improves I/O performance by striping data across multiple disks, a more complicated caching mechanism is required for a RAID system. Upon studying the caching mechanism in a production storage system, we found that the processor on the system spent a lot of time in indexing the requested disk blocks into the cache memory. Therefore, we propose an indexing method to reduce the access time for the system via a Fast Indexing Table. Finding requested disk blocks via our Fast Indexing Table is far faster than the original indexing method as it is done without complicated RAID indexing operations. We implemented our new indexing method in the storage system and verified its performance through experiments. Our experimental results show that the Fast Indexing Table accelerates the throughput of the storage system significantly with very little increase on the processor and memory usage. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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