Class ConstraintSolverConfig
java.lang.Object
org.apache.storm.scheduler.resource.strategies.scheduling.ConstraintSolverConfig
Component constraint as derived from configuration.
 This is backward compatible and can parse old style Config.TOPOLOGY_RAS_CONSTRAINTS and Config.TOPOLOGY_SPREAD_COMPONENTS.
 New style Config.TOPOLOGY_RAS_CONSTRAINTS is map where each component has a list of other incompatible components
 and an optional number that specifies the maximum co-location count for the component on a node.
 
comp-1 cannot exist on same worker as comp-2 or comp-3, and at most "2" comp-1 on same node
comp-2 and comp-4 cannot be on same worker (missing comp-1 is implied from comp-1 constraint)
{ "comp-1": { "maxNodeCoLocationCnt": 2, "incompatibleComponents": ["comp-2", "comp-3" ] }, "comp-2": { "incompatibleComponents": [ "comp-4" ] } }
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Field SummaryFields
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Constructor SummaryConstructorsConstructorDescription
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Method SummaryModifier and TypeMethodDescriptionReturn an object that maps component names to a set of other components which are incompatible and their executor instances cannot co-exist on the same worker.Return an object that maps component names to a numeric maximum limit of executor instances (of that component) that can exist on any node.
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Field Details- 
CONSTRAINT_TYPE_MAX_NODE_CO_LOCATION_CNT- See Also:
 
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CONSTRAINT_TYPE_INCOMPATIBLE_COMPONENTS- See Also:
 
 
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Constructor Details- 
ConstraintSolverConfig
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ConstraintSolverConfig
 
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Method Details- 
getIncompatibleComponentSetsReturn an object that maps component names to a set of other components which are incompatible and their executor instances cannot co-exist on the same worker. The map will contain entries only for components that have thisCONSTRAINT_TYPE_INCOMPATIBLE_COMPONENTSconstraint specified.- Returns:
- a map of component to a set of components that cannot co-exist on the same worker.
 
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getMaxNodeCoLocationCntsReturn an object that maps component names to a numeric maximum limit of executor instances (of that component) that can exist on any node. The map will contain entries only for components that have thisCONSTRAINT_TYPE_MAX_NODE_CO_LOCATION_CNTconstraint specified.- Returns:
- a map of component to its maximum limit of executor instances on a node.
 
 
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