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。
