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Rules associated with the VirtualCenter plug-in (2044414)
This article provides information about rule types associated with the VirtualCenter plug-in.
The VirtualCenter plug-in (VirtualCenterNFPlugin.dll) employs two rule types to monitor vCenter Server and its associated services:
- Latched Rule – The latched rule provides only one recovery action, labeled as On Failure in the vCenter Server Heartbeat Console.
Latched rules are triggered only once and are then disabled until they are re-enabled by manual intervention from the administrator. Latched rules are typically used in situations where multiple triggering is undesirable or could cause problems. Latched rules provide the functionality to alert the administrator about a problem once and then stop triggering until the problem has been fixed.
- Timed Rule – The timed rule provides three recovery actions, labeled as On First Failure, On Second Failure, and On Third Failure in the vCenter Server Heartbeat Console.
Timed rules are triggered when a specific condition registers as true for a specified length of time. Timed rules are normally used in conditions where immediate triggering is undesirable. For example, a CPU can be configured to trigger when it exceeds 90% for five minutes. The timed rule requires that the threshold must be exceeded for 5 minutes before it can trigger rather than the moment the CPU exceeds 90%.
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