优化域名系统(DNS)性能是减少域名系统解析时间的关键,已成为研究热点。该文提出的基于TTL失效的再生策略,能达到很快的查询速度。对具体网站的性能测试表明所设计的DNS加速器相比于传统DNS服务器,在缓存命中率、网络流量、CPU负载和DNS查询响应时间等方面都具有很优异的性能,达到了良好的加速效果。
As a key technology to reduce DNS resolution time, DNS performance optimization becomes a heated research issue. This paper proposes failed TTL-based renewal policy, which attains quicker query speed. Compared with traditional server of DNS, the accelerator of DNS is good at cache hit-rate, network traffic, CPU load and query-response time by the performance test of the concrete website, which achieves good performance.