Ehdns:一种DNS解析异常处理系统

Ehdns: Exception Handler of Domain Name System

DNS解析异常处理系统,当在根DNS、授权DNS等DNS发生解析异常时,不但可以静态地利用解析配置文件,还可以动态地统计分析历史解析结果,从而给出正确的解析结果,从而提高DNS的可用性和可靠性。文章设计并实现了一种DNS解析异常处理办法—Ehdns,提出了Ehdns的异常处理模型,展示了它的静态文件的格式、缓存中数据结构,介绍了Ehdns实现的关键技术,并进行了一定的测试。

Exception handler of Domain Name System, when parsing exception occurs in the root, authorized and any other Domain Name System, which can work out the correct results, not only according to the static configuration, but also analyze the past results. This paper designs and implements a DNS exception handler resolution--Ehdn, which will improve the availability and reliability. This paper introduces the specific modeling of Ehdns, format of its static files, data structure in memcache and some other key technologies. Moreover, some tests are implemented.