摘要： 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。
关键词:
域名系统(DNS),
TTL,
再生策略,
加速器
Abstract: 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.
Key words:
DNS,
TTL,
renewal policy,
accelerator
中图分类号:
张志立;谢 嵘;齐德昱. 基于再生策略的DNS加速器设计与实现[J]. 计算机工程, 2007, 33(20): 8-11,1.
ZHANG Zhi-li; XIE Rong; QI De-yu. Design and Implementation of DNS Accelerator Based on Renewal Policy[J]. Computer Engineering, 2007, 33(20): 8-11,1.