Package org.apache.hadoop.yarn.server.nodemanager.containermanager.scheduler

Enum Class OpportunisticContainersQueuePolicy

java.lang.Object

java.lang.Enum<OpportunisticContainersQueuePolicy>

org.apache.hadoop.yarn.server.nodemanager.containermanager.scheduler.OpportunisticContainersQueuePolicy

All Implemented Interfaces:

Serializable, Comparable<OpportunisticContainersQueuePolicy>, Constable

public enum OpportunisticContainersQueuePolicy
extends Enum<OpportunisticContainersQueuePolicy>

Determines how to schedule opportunistic containers at the NodeManager, i.e., whether or not to accept, queue, or reject a container run request.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
BY_QUEUE_LEN	Determines whether or not to run a container by the queue capacity: YarnConfiguration.NM_OPPORTUNISTIC_CONTAINERS_MAX_QUEUE_LENGTH.
BY_RESOURCES	Determines whether or not to run a container based on the amount of resource capacity the node has.

Field Summary

Fields

Modifier and Type	Field	Description
static final OpportunisticContainersQueuePolicy	DEFAULT

Method Summary

Modifier and Type	Method	Description
static OpportunisticContainersQueuePolicy	valueOf(String name)	Returns the enum constant of this class with the specified name.
static OpportunisticContainersQueuePolicy[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

BY_QUEUE_LEN

public static final OpportunisticContainersQueuePolicy BY_QUEUE_LEN

Determines whether or not to run a container by the queue capacity: YarnConfiguration.NM_OPPORTUNISTIC_CONTAINERS_MAX_QUEUE_LENGTH. If there's enough capacity in the queue, queues the container, otherwise rejects it.

BY_RESOURCES

public static final OpportunisticContainersQueuePolicy BY_RESOURCES

Determines whether or not to run a container based on the amount of resource capacity the node has. Sums up the resources running + already queued at the node, compares it with the total capacity of the node, and accepts the new container only if the computed resources above + resources used by the container is less than or equal to the node capacity.

Field Details

DEFAULT

public static final OpportunisticContainersQueuePolicy DEFAULT

Method Details

values

public static OpportunisticContainersQueuePolicy[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static OpportunisticContainersQueuePolicy valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null