提高RAID重构性能的可用性感知缓存管理

2010 13th IEEE International Conference on Computational Science and Engineering Pub Date : 2010-12-11 DOI:10.1109/CSE.2010.38

Suzhen Wu, Bo Mao, D. Feng, Jianxi Chen

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引用次数: 4

摘要

由于硬盘故障率高，RAID重构性能对RAID存储系统的可用性有很大影响。大多数现有的RAID结构存储系统的缓存管理侧重于提高性能或能源效率，而没有打算通过加快RAID重建过程来提高RAID的可用性。在本文中，我们提出了一种新颖实用的可用性感知缓存管理，使重构过程在物理磁盘上更加有序，并减少了额外的重构I/O请求。我们实现了一个可用性感知缓存管理的原型，称为Shaper，以验证其在RAID重构中的有效性。Shaper在正常模式下不影响I/O性能，但有可能同时显著减少RAID重构时间和重构期间的平均用户响应时间。

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Availability-Aware Cache Management with Improved RAID Reconstruction Performance

The RAID reconstruction performance has a significant impact on the availability of RAID-structured storage systems due to the high disk failure rate. Most existing cache managements for RAID-structured storage systems focus on improving the performance or the energy efficiency, while they do not intent to improve the RAID availability by boosting the RAID reconstruction process. In this paper, we propose a novel and practical Availability-aware Cache Management to make the reconstruction process more sequential in the physical disks and reduce the extra reconstruction I/O requests. We implement a prototype of Availability-aware Cache Management, called Shaper, to verify its effectiveness on the RAID reconstruction. Shaper does not affect the I/O performance in the normal mode, but has potential to significantly reduce the RAID reconstruction time and the average user response time during reconstruction simultaneously.

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来源期刊

2010 13th IEEE International Conference on Computational Science and Engineering

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