Just make sure the lag time between the master host failing and the slave host taking over is minimal.
要确保主服务器发生故障和辅助服务器实施接管之间的延迟时间最小。
Master zones are those for which the server is a master host (i.e., the delegated server for the domain).
主区域是主机(即该域的委托服务器)的区域。
Under normal circumstances, only the master host will be sending out notifications to contacts about problems.
在正常情况下，只有主服务器会在有问题时向联系人发出通知。
The basic goal of failover monitoring is to have the Nagios process on the slave host sit idle while the Nagios process on the master host is running.
故障转移监视的基本目标是让主服务器上的Nagios进程运行，同时让辅助服务器上的Nagios进程空闲。
If the master host starts to get too busy, it can redirect requests to the other host.
如果主主机过于繁忙，它会把请求转向其他的主机。
If the master host starts to get too busy, it can redirect requests to the other host.
如果主主机过于繁忙，它会把请求转向其他的主机。
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