DNS BIND logging Clause

This section describes the logging clause which prior to BIND 9 needed to appear first in the named.conf file. This no longer the case and it may appear anywhere convenient. BIND uses syslogd before a valid logging clause is available so named.conf parse errors and other information will appear in /var/log/messages (depending on syslog.conf) prior to, or in the absence of, a valid logging clause. In the case of windows parse errors are written to the Event Log. Only one logging clause can be defined but multiple channels may be defined to stream logs.

         对于排除DNS故障来说，日志文件是极其重要的工具，DNS日志可以记录服务器CPU占用时间，查询统计信息以及配置中存在的问题。经常分析日志可以了解服务器的负荷，性能安全性，从而及时采取措施纠正错误。