sheerdns is a master dns server whose zone records are stored on a One-Record-Per-File bases. Because of this, it is the simplest of any dns to configure, the easiest to update, and the most efficient for networks that experience a lot of updates (for example master servers for dynamic IP address ranges). You never have to restart it; any updates are available immediately without having to notify the sheerdns process. 來源: http://freshmeat.net/projects/sheerdns/?topic_id=149 sheerdns是一個主dns服務器,它的域記錄保存在一個One-Record-Per-File(每文件一個記錄)的庫中。因此,它是最簡單的dns配制,最容易更新,對于有大量更新的網絡(如動態IP地址范圍的主服務器)來說它是最高效的。你不必重新啟動它,任何更新不用通知對應dns進程就可以立即生效。