HP ProLiant DL380G5-WSS 3.7.0 HP StorageWorks HP Scalable NAS File Serving Sof - Page 302
Guidelines for creating and using virtual hosts
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The following example shows the virtual host failover mechanism. Servers A and B provide the http service, which is accessed with the virtual host www.xvz.com. Each server is configured with an http service monitor and a custom device monitor to ping the router. The failover operation to another network interface has minimal impact on clients. For example, if clients were downloading Web pages during the failover, they would receive a "transfer interrupted" message and could simply reload the Web page. If they were reading Web pages, they would not notice any interruption. If the active network interface fails, only the virtual hosts associated with that interface are failed over. If the underlying server has other virtual hosts configured on another network interface, those virtual hosts will continue to access that server. For more information about failover, see "Virtual hosts and failover" on page 309. Guidelines for creating and using virtual hosts When creating virtual hosts, follow these guidelines: • When planning the virtual hosts needed for your cluster, first determine the network services that will be available to your clients. Then determine the IP addresses for those services. You will need to create a virtual host for each IP address. • Choose virtual hostnames that differ from your actual server names. Virtual hosts are independent of specific servers, and their names should be independent as well. • Use an IP address that is on the same subnet as the network interfaces where it will be configured. 302 Configure virtual hosts
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