HP ProLiant DL380G5-WSS 3.7.0 HP StorageWorks HP Scalable NAS File Serving Sof - Page 351
Custom device monitors, on each server: Up, Down, Unknown, Timeout.
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Custom device monitors A custom device monitor is associated with a list of servers and a list of virtual hosts configured on those servers. A custom device monitor can be active on only one server at a time. On each server, the monitor uses a probe mechanism to determine whether the service is active. The probe mechanism is in one of the following states on each server: Up, Down, Unknown, Timeout. A custom device monitor also has an activity status on each server. This status indicates the current activity of the monitor on the server. The status can be one of the following: Starting, Active, Suspended, Stopping, Inactive, Failure. If it is necessary to fail over a virtual host associated with the device monitor, HP Scalable NAS looks for a server that meets both of these conditions: the device monitor is active, and the device monitor probe reports an Up status. If HP Scalable NAS cannot locate a server where the device is active and the probe status is Up, the virtual host will be left inactive across the cluster. The following example shows the state transitions for a custom device monitor and its associated virtual host. The device monitor uses the default values for autorecover, priority, and serial script ordering, and has a Start and Stop script defined. The virtual host is configured with a Primary network interface and two backup interfaces. There is also a service monitor defined on the virtual host. It uses the default values for HP Scalable NAS File Serving Software administration guide 351
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