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US07966364B2 System and method for virtual server migration across networks using DNS and route triangulation 有权
使用DNS和路由三角测量的虚拟服务器跨网络迁移的系统和方法

System and method for virtual server migration across networks using DNS and route triangulation
摘要：
A first virtual server is moved from a first network location to a second network location without interrupting service to users of the first virtual server. The state and data of the first virtual server are copied and transmitted to the second network location to create a copy of the first virtual server. The first virtual server copy is then updated to duplicate the first virtual server and all connections or packets directed to the first virtual server are intercepted and directed to the first virtual server copy at the second network location. A DNS entry for the symbolic name of the first virtual server is updated to reflect a shortened TTL value and then the address field of the DNS entry is set to the address of the first virtual server copy after the changeover and subsequent connections are directed to the first virtual server copy.
摘要（中）：

第一虚拟服务器从第一网络位置移动到第二网络位置，而不中断对第一虚拟服务器的用户的服务。 将第一虚拟服务器的状态和数据复制并发送到第二网络位置以创建第一虚拟服务器的副本。 然后更新第一个虚拟服务器副本以复制第一个虚拟服务器，并且拦截指向第一个虚拟服务器的所有连接或数据包，并定向到第二个网络位置的第一个虚拟服务器副本。 更新第一个虚拟服务器的符号名称的DNS条目以反映一个缩短的TTL值，然后将DNS条目的地址字段设置为转换后的第一个虚拟服务器副本的地址，并将后续连接指向 第一个虚拟服务器副本。

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