org.apache.hadoop.yarn.util.resource

Class ResourceUtils

java.lang.Object

org.apache.hadoop.yarn.util.resource.ResourceUtils

public class ResourceUtils
extends Object

Helper class to read the resource-types to be supported by the system.

Field Summary

Fields

Modifier and Type	Field and Description
static String	MAXIMUM_ALLOCATION
static String	MINIMUM_ALLOCATION
static String	TYPE
static String	UNITS
static String	YARN_IO_OPTIONAL

Method Summary

Modifier and Type	Method and Description
static ResourceInformation[]	createResourceTypesArray(Map<String,Long> res) Create an array of ResourceInformation objects corresponding to the passed in map of names to values.
static Resource	fetchMaximumAllocationFromConfig(org.apache.hadoop.conf.Configuration conf) Get maximum allocation from config, *THIS WILL NOT UPDATE INTERNAL DATA*
static String	getDefaultUnit(String resourceType) Get default unit by given resource type.
static Map<String,ResourceInformation>	getNodeResourceInformation(org.apache.hadoop.conf.Configuration conf) Function to get the resources for a node.
static int	getNumberOfKnownResourceTypes()
static List<ResourceInformation>	getRequestedResourcesFromConfig(org.apache.hadoop.conf.Configuration configuration, String prefix) From a given configuration get all entries representing requested resources: entries that match the {prefix}{resourceName}={value}[{units}] pattern.
static List<ResourceTypeInfo>	getResourcesTypeInfo() Get all resource types information from known resource types.
static Map<String,Integer>	getResourceTypeIndex() Get associate index of resource types such memory, cpu etc.
static Map<String,ResourceInformation>	getResourceTypes() Get the resource types to be supported by the system.
static ResourceInformation[]	getResourceTypesArray()
static Resource	getResourceTypesMaximumAllocation() Get a Resource object with for the maximum allocation possible.
static Resource	getResourceTypesMinimumAllocation()
static String	getUnits(String resourceValue)
static void	initializeResourcesFromResourceInformationMap(Map<String,ResourceInformation> resourceInformationMap) This method is visible for testing, unit test can construct a resourceInformationMap and pass it to this method to initialize multiple resources.
static void	reinitializeResources(List<ResourceTypeInfo> resourceTypeInfo) Reinitialize all resource types from external source (in case of client, server will send the updated list and local resourceutils cache will be updated as per server's list of resources)
static void	resetNodeResources()
static void	resetResourceTypes()
static Map<String,ResourceInformation>	resetResourceTypes(org.apache.hadoop.conf.Configuration conf)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

UNITS

public static final String UNITS

See Also:

Constant Field Values

TYPE

public static final String TYPE

See Also:

Constant Field Values

MINIMUM_ALLOCATION

public static final String MINIMUM_ALLOCATION

See Also:

Constant Field Values

MAXIMUM_ALLOCATION

public static final String MAXIMUM_ALLOCATION

See Also:

Constant Field Values

YARN_IO_OPTIONAL

public static final String YARN_IO_OPTIONAL

See Also:

Constant Field Values

Method Detail

fetchMaximumAllocationFromConfig

public static Resource fetchMaximumAllocationFromConfig(org.apache.hadoop.conf.Configuration conf)

Get maximum allocation from config, *THIS WILL NOT UPDATE INTERNAL DATA*

Parameters:

conf - config

Returns:

maximum allocation

initializeResourcesFromResourceInformationMap

public static void initializeResourcesFromResourceInformationMap(Map<String,ResourceInformation> resourceInformationMap)

This method is visible for testing, unit test can construct a resourceInformationMap and pass it to this method to initialize multiple resources.

Parameters:

resourceInformationMap - constructed resource information map.

getResourceTypeIndex

public static Map<String,Integer> getResourceTypeIndex()

Get associate index of resource types such memory, cpu etc. This could help to access each resource types in a resource faster.

Returns:

Index map for all Resource Types.

getResourceTypes

public static Map<String,ResourceInformation> getResourceTypes()

Get the resource types to be supported by the system.

Returns:

A map of the resource name to a ResouceInformation object which contains details such as the unit.

getResourceTypesArray

public static ResourceInformation[] getResourceTypesArray()

getNumberOfKnownResourceTypes

public static int getNumberOfKnownResourceTypes()

resetResourceTypes

public static void resetResourceTypes()

resetResourceTypes

public static Map<String,ResourceInformation> resetResourceTypes(org.apache.hadoop.conf.Configuration conf)

getUnits

public static String getUnits(String resourceValue)

getNodeResourceInformation

public static Map<String,ResourceInformation> getNodeResourceInformation(org.apache.hadoop.conf.Configuration conf)

Function to get the resources for a node. This function will look at the file YarnConfiguration.NODE_RESOURCES_CONFIGURATION_FILE to determine the node resources.

Parameters:

conf - configuration file

Returns:

a map to resource name to the ResourceInformation object. The map is guaranteed to have entries for memory and vcores

resetNodeResources

public static void resetNodeResources()

getResourceTypesMinimumAllocation

public static Resource getResourceTypesMinimumAllocation()

getResourceTypesMaximumAllocation

public static Resource getResourceTypesMaximumAllocation()

Get a Resource object with for the maximum allocation possible.

Returns:

a Resource object with the maximum allocation for the scheduler

getDefaultUnit

public static String getDefaultUnit(String resourceType)

Get default unit by given resource type.

Parameters:

resourceType - resourceType

Returns:

default unit

getResourcesTypeInfo

public static List<ResourceTypeInfo> getResourcesTypeInfo()

Get all resource types information from known resource types.

Returns:

List of ResourceTypeInfo

getRequestedResourcesFromConfig

public static List<ResourceInformation> getRequestedResourcesFromConfig(org.apache.hadoop.conf.Configuration configuration,
                                                                        String prefix)

From a given configuration get all entries representing requested resources: entries that match the {prefix}{resourceName}={value}[{units}] pattern.

Parameters:

configuration - The configuration

prefix - Keys with this prefix are considered from the configuration

Returns:

The list of requested resources as described by the configuration

createResourceTypesArray

public static ResourceInformation[] createResourceTypesArray(Map<String,Long> res)

Create an array of ResourceInformation objects corresponding to the passed in map of names to values. The array will be ordered according to the order returned by getResourceTypesArray(). The value of each resource type in the returned array will either be the value given for that resource in the res parameter or, if none is given, 0.

Parameters:

res - the map of resource type values

Returns:

an array of ResourceInformation instances

reinitializeResources

public static void reinitializeResources(List<ResourceTypeInfo> resourceTypeInfo)

Reinitialize all resource types from external source (in case of client, server will send the updated list and local resourceutils cache will be updated as per server's list of resources)

Parameters:

resourceTypeInfo - List of resource types