| 一种基于RAID5的Disk Cache的实现 |
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| 引用本文： | 王湘娜,蒋本珊,徐渐. 一种基于RAID5的Disk Cache的实现[J]. 计算机应用, 2004, 24(3): 106-109 |
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| 作者姓名： | 王湘娜 蒋本珊 徐渐 |
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| 作者单位： | 北京理工大学,计算机科学工程系,北京,100081;清华大学,计算机科学与技术系,北京,100084 |
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| 摘 要： | 介绍了一种基于RAID5的Disk Cache的实现。在对磁盘阵列Cache的实现过程中，使用了组相联映射、LRU替换算法等比较成熟的技术，在Cache回写策略上采用write-back方式。从而提高了写磁盘速度，减少冗余写盘操作。另外通过对校验组加锁，有效地防止了同一校验组里多个块同时降级而导致的数据不一致现象。
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| 关 键 词： | RAID5 disk cache 校验 write-back LRU |
| 文章编号： | 1001-9081(2004)03-0106-03 |
An Implementation of RAID5 Based Disk Cache |
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| WANG Xiang-na,JIANG Ben-shan,XU Jian. An Implementation of RAID5 Based Disk Cache[J]. Journal of Computer Applications, 2004, 24(3): 106-109 |
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| Authors: | WANG Xiang-na JIANG Ben-shan XU Jian |
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| Affiliation: | WANG Xiang-na~1,JIANG Ben-shan~1,XU Jian~2 |
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| Abstract: | This article introduces an implementation of RAID5 based disk cache. In the process of implementing the disk array cache, we used some mature techniques, set-associated map, LRU replace policy, and so on. By using write-back policy, we improved the speed of writing to disk and reduced redundant disk write operations. In addition, by locking the parity group, we effectively prevented data inconsistency caused by simultaneous degrade of multi blocks within the same parity group. |
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| Keywords: | RAID5 disk cache parity write-back LRU |
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