基于改进型缓存策略的文件下载服务机制

File Download Service Mechanism Based on a Modified Cache Replacement Strategy

为了提高小型服务器文件下载服务的质量,缓解并发下载请求时I/O瓶颈导致的下载速度问题,提出了一种改进型缓存替换策略,并设计了基于该策略的文件下载服务机制。实验结果表明该机制具有较高的字节命中率和请求命中率,在处理并发下载请求时,有效地降低了I/O随机读取频率,改善了服务质量。

In order to improve the quality of the file download service in small server,and to ease the slow download speeds in intercurrent download requests because of I/O bottlenecks,this paper proposes a modified cache replacement strategy,and designs a file download service mechanism based on this strategy.The results of experimentation show that this mechanism can achieve both document hit rate and document byte hit rate.It can effectively reduce the I/O reading frequency at random and improve the quality of service to deal with the intercurrent download requests.