一种基于SSD缓存的RAID1技术研究

发布时间：2018-01-13 06:04

本文关键词：一种基于SSD缓存的RAID1技术研究　出处：《华中科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着高新技术的飞速发展，固态盘被引入到存储系统中，它的高性能、低能耗等特点能够满足现代数据存储的需要，对解决传统磁盘的性能瓶颈起到了很好的作用。但是固态盘的价格高，容量小，完全用固态盘替代磁盘，成本开销太大，一般企业无法承受。为了提高系统性能，降低存储系统的成本，通常将固态盘充当分级存储介质或者磁盘缓存，这也是目前固态盘方案的研究热点。分析了一些将固态盘作缓存的已有技术，提出并设计了一种既能利用固态盘性能、降低存储成本，又能保证存储系统的可靠性的方案。利用固态盘的读写特点，将热点数据存储到固态盘中，冷数据存储到磁盘中。为了保证热数据和冷数据的可靠性，磁盘上存放两份数据，，既有热数据副本，又有冷数据副本，冷热副本随着固态盘缓存的替换自动转变。多个磁盘的组织方式类似于RAID1，并为不同的应用场景设计了三种不同的数据分布方式。采用模拟的方式，实现了设计方案。针对阵列不同的数据分布方式进行对比测试，测试表明上述数据分布方式可适用于相应的应用场景。并与固态盘缓存写通过方式和热数据在多个固态盘进行副本存放的方式进行了对比，结果表明，设计的方案能够在性能与价格之间取得好的平衡，并且能够保证可靠性。
[Abstract]:With the rapid development of high and new technology, solid-state disk is introduced into the storage system, its high performance, low energy consumption and other characteristics can meet the needs of modern data storage. It plays a good role in solving the performance bottleneck of the traditional disk, but the cost of the solid-state disk is too high to replace the disk completely with the solid-state disk because of its high price and small capacity. In order to improve system performance and reduce the cost of storage system, solid state disk is usually used as hierarchical storage medium or disk cache. This paper analyzes some existing technologies of using solid state disk as buffer, and proposes and designs a kind of storage technology which can not only utilize the performance of solid state disk, but also reduce the storage cost. In order to ensure the reliability of the hot data and cold data, the hot data is stored on the solid disk and the cold data is stored on the disk. In order to ensure the reliability of the hot data and the cold data, the method can guarantee the reliability of the storage system. Two copies of data are stored on the disk, both hot and cold, which automatically change with the replacement of the solid-state disk cache. Multiple disks are organized in a similar manner to RAID1. Three different data distribution modes are designed for different application scenarios. The simulation method is used to realize the design scheme. The different data distribution modes of the array are compared and tested. The test results show that the above data distribution mode can be applied to the corresponding application scenarios, and compared with the write mode of solid state disk cache and the way of storing thermal data in multiple solid state disks, the results show that. The designed scheme can achieve a good balance between performance and price, and can ensure reliability.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP333

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