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" ] } }
-
Field Summary
-
Constructor Summary
ConstructorDescription -
Method Summary
Modifier 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.
-
Field Details
-
CONSTRAINT_TYPE_MAX_NODE_CO_LOCATION_CNT
- See Also:
-
CONSTRAINT_TYPE_INCOMPATIBLE_COMPONENTS
- See Also:
-
-
Constructor Details
-
ConstraintSolverConfig
-
ConstraintSolverConfig
-
-
Method Details
-
getIncompatibleComponentSets
Return 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_COMPONENTS
constraint specified.- Returns:
- a map of component to a set of components that cannot co-exist on the same worker.
-
getMaxNodeCoLocationCnts
Return 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_CNT
constraint specified.- Returns:
- a map of component to its maximum limit of executor instances on a node.
-