摘要
针对内存、固态硬盘、机械硬盘构成的混合存储系统,提出了一种综合LRU和LFU算法优点的缓存算法ODCA,该算法综合考虑了数据页的时间局部性和空间局部性特点,通过一种热度值来对数据页的冷热程度进行衡量。测试结果表明,ODCA缓存算法比LRU和LFU算法具有更高的I/O性能和更强的稳定性。
The ODCA caching algorithm that combines the advantages of LRU and LFU for hybrid storage system which is composed of RAM,SSD and RAID is provided.ODCA caching algorithm takes temporal locality and spatial locality of data page into account,and the hot level of date page is measured through a hot-value.The test results show that ODCA caching algorithm has higher I/O performance and stronger stability than LRU and LFU.
作者
张剑
ZHANG Jian(China Ship Development and Design Center,Wuhan 430064)
出处
《计算机与数字工程》
2020年第5期1072-1075,1190,共5页
Computer & Digital Engineering
