HP ProLiant DL380G5-WSS 3.7.0 HP StorageWorks HP Scalable NAS File Serving Sof - Page 309
Virtual hosts and failover, Virtual host activeness policy
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Virtual hosts and failover When you create a virtual host, you specify a list of network interfaces on which the virtual host can be located. The interfaces are placed in order: primary, backup #1, backup #2, and so on. The ClusterPulse process considers the "health" of the servers providing those interfaces when determining where to place a virtual host. The status and enablement of the service and device monitors associated with the virtual host also contribute to a server's health calculation. When a server is completely "healthy," all of the services associated with the virtual host are up and enabled. When certain events occur on the server where a virtual host is located, the ClusterPulse process will attempt to fail over the virtual host to another server configured for that virtual host. For example, if the server goes down, ClusterPulse will check the health of the other servers and then determine the best location for the virtual host. ClusterPulse uses the following virtual-host activeness policy to determine the server where it will make a virtual host active. In conjunction with this policy, the decisions that you make when configuring a virtual host and the service or device monitors associated with it help determine whether virtual host failover occurs, the interface to which the virtual host will fail over, and what happens when operations are restored on the original server. Virtual host activeness policy The policy described here is accurate for this release but it may change in future releases. The virtual host activeness policy is as follows: 1. If the virtual host is disabled, it is not made active anywhere. HP Scalable NAS File Serving Software administration guide 309
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