当服务使用DNS做为伺服器间或伺服器丛集间的负载平衡机制时，这个选项会很有用。
This option is useful when a service USES DNS as a load balancing mechanism between servers or server clusters.
当服务使用DNS做为伺服器间或伺服器丛集间的负载平衡机制时，这个选项会很有用。
This option is useful when a service USES DNS as a load balancing mechanism between servers or server clusters.
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