HP ProLiant DL380G5-WSS 3.7.0 HP StorageWorks HP Scalable NAS File Serving Sof - Page 342
Set a global event delay, Global Settings, Delay seconds
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Set a global event delay A device monitor that is configured to be multi-active or to probe on multiple servers can experience a global event, in which the shared resource being monitored is reported to be down on all servers. When the shared resource becomes active again, the monitor probe on each server will report that the resource is up. Typically a monitor instance on one server will report that the resource is up before the instances on all of the other servers have completed their probe operations. When this occurs, the virtual hosts (if any) that are associated with this monitor can fail over to the server that first reports that it is Up. When the monitors on the other servers report an Up status, the virtual hosts can fail back to their original primary servers. If you are experiencing unwanted failover/failback operations, you can increase the Global Event Delay, which causes virtual hosts to wait for the specified period of time before performing the failover. The delay should provide enough time for all of the monitor instances to run the probe operation and report that the shared resource has come back up, thus preventing the failovers. The Global Event Delay applies to all multi-probe or multi-active device monitors and Export Group monitors configured in the cluster. To set the Global Event Delay, select a device monitor on the Management Console, right-click, and select Global Settings (or select Edit > Global Settings). Enable Global Event Delay. This feature is enabled by default. Delay (seconds): Enter the number of seconds that the device monitor should wait before failing over virtual hosts following a global event. The default is 65 seconds. To determine the number of seconds for the delay, check the probe frequency and probe timeout values of the shared resource monitors in your configuration. Using the monitor with the largest values, add together the number of seconds specified for the probe frequency and probe timeout. The delay should be at least as large as that value. 342 Configure device monitors