| Package | Description | 
|---|---|
| org.apache.hadoop.yarn.server | Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements. | 
| org.apache.hadoop.yarn.server.scheduler | Utility classes used for Scheduling. | 
| Class and Description | 
|---|
| ResourceRequestSet A set of resource requests of the same scheduler key
  ResourceRequestSetKey. | 
| ResourceRequestSetKey The scheduler key for a group of  ResourceRequest. | 
| Class and Description | 
|---|
| OpportunisticContainerAllocator 
 Base abstract class for Opportunistic container allocations, that provides
 common functions required for Opportunistic container allocation. | 
| OpportunisticContainerAllocator.Allocation This class encapsulates container and resourceName for an allocation. | 
| OpportunisticContainerAllocator.AllocationParams This class encapsulates application specific parameters used to build a
 Container. | 
| OpportunisticContainerAllocator.ContainerIdGenerator A Container Id Generator. | 
| OpportunisticContainerAllocator.EnrichedResourceRequest This class encapsulates Resource Request and provides requests per
 node and rack. | 
| OpportunisticContainerAllocator.PartitionedResourceRequests Class that includes two lists of  ResourceRequests: one for
 GUARANTEED and one for OPPORTUNISTICResourceRequests. | 
| OpportunisticContainerContext This encapsulates application specific information used by the
 Opportunistic Container Allocator to allocate containers. | 
| ResourceRequestSet A set of resource requests of the same scheduler key
  ResourceRequestSetKey. | 
| ResourceRequestSetKey The scheduler key for a group of  ResourceRequest. | 
| SchedulerRequestKey Composite key for outstanding scheduler requests for any schedulable entity. | 
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