Research on improved cache replacement algorithm serving for wind power system

To improve the distributed cache replacement algorithm performance in wind power system, after researching several traditional algorithms such as LFU (Least Frequently Used), SIZE (Object Size Based), LRU (Least Recently Used) and Hybrid (Saved Value Based), a new algorithm FST (Frequency, Object size, Access time) is proposed. This algorithm combines the features of access frequency, object size, access time interval, and the longest time without access. It avoids the outdated “hot spots” document's occupying memory space to waste resources, so it is supposed to improve the system performance. By taking contrast test with LFU, SIZE and LRU in the wind power system cache server, FST algorithm shows better performance in request hit rate, byte hit rate and reducing delay time.