Allocation Rules

Allocation rules are used in the horizontal cluster to determine which primary node a new clustered resource should be allocated to. When a new clustered resource is created, the Cluster Coordinator evaluates the Condition expression of each allocation rule sequentially, starting at the top, until a condition evaluates to True. In this case, the corresponding Expression is evaluated. The resource is allocated to the node matching the server ID produced by the Expression. If the evaluation does not result in a valid server ID, the resource is allocated according to a round robin strategy.

Field Description			Field Name
Name. Allocation rule name.			name
Expression. The expression defines the logic for determining which primary node should be allocated for a new resource. Must return a valid Server ID.	Expression Expression Resolution Environment:		expression
	Default Data Table	Data table with a single field `resourcePath` and single row containing the context path of the resource being evaluated for allocation.
	Default Context	Root context of the Cluster Coordinator
	Default Row	0
	Environment Variables	Standard variables only.
Condition: The condition property specifies additional criteria that must be met for an allocation rule to be applied. If the condition evaluates to `True`, then the Expression will be executed.	Condition Expression Resolution Environment:		condition
	Default Data Table	Data table with a single field `resourcePath` and single row containing the context path of the resource being evaluated for allocation
	Default Context	Root context of the Cluster Coordinator
	Default Row	0
	Environment Variables	Standard variables only.
Comment. Adds comments or notes about the allocation rule for documentation or reference purposes.			comment

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