org.apache.hadoop.util

类 ResourceCalculatorPlugin

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.util.ResourceCalculatorPlugin

所有已实现的接口:

Configurable

直接已知子类:

LinuxResourceCalculatorPlugin

public abstract class ResourceCalculatorPlugin
extends Configured

Plugin to calculate resource information on the system.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ResourceCalculatorPlugin.ProcResourceValues

构造器概要

构造器

构造器和说明
ResourceCalculatorPlugin()

方法概要

方法

限定符和类型	方法和说明
abstract long	getAvailablePhysicalMemorySize() Obtain the total size of the available physical memory present in the system.
abstract long	getAvailableVirtualMemorySize() Obtain the total size of the available virtual memory present in the system.
abstract long	getCpuFrequency() Obtain the CPU frequency of on the system.
abstract float	getCpuUsage() Obtain the CPU usage % of the machine.
abstract long	getCumulativeCpuTime() Obtain the cumulative CPU time since the system is on.
abstract int	getNumProcessors() Obtain the total number of processors present on the system.
abstract long	getPhysicalMemorySize() Obtain the total size of the physical memory present in the system.
abstract ResourceCalculatorPlugin.ProcResourceValues	getProcResourceValues() Obtain resource status used by current process tree.
static ResourceCalculatorPlugin	getResourceCalculatorPlugin(Class<? extends ResourceCalculatorPlugin> clazz, Configuration conf) Get the ResourceCalculatorPlugin from the class name and configure it.
abstract long	getVirtualMemorySize() Obtain the total size of the virtual memory present in the system.

从类继承的方法 org.apache.hadoop.conf.Configured

getConf, setConf

从类继承的方法 java.lang.Object

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

构造器详细资料

ResourceCalculatorPlugin

public ResourceCalculatorPlugin()

方法详细资料

getVirtualMemorySize

public abstract long getVirtualMemorySize()

Obtain the total size of the virtual memory present in the system.

返回:

virtual memory size in bytes.

getPhysicalMemorySize

public abstract long getPhysicalMemorySize()

Obtain the total size of the physical memory present in the system.

返回:

physical memory size bytes.

getAvailableVirtualMemorySize

public abstract long getAvailableVirtualMemorySize()

Obtain the total size of the available virtual memory present in the system.

返回:

available virtual memory size in bytes.

getAvailablePhysicalMemorySize

public abstract long getAvailablePhysicalMemorySize()

Obtain the total size of the available physical memory present in the system.

返回:

available physical memory size bytes.

getNumProcessors

public abstract int getNumProcessors()

Obtain the total number of processors present on the system.

返回:

number of processors

getCpuFrequency

public abstract long getCpuFrequency()

Obtain the CPU frequency of on the system.

返回:

CPU frequency in kHz

getCumulativeCpuTime

public abstract long getCumulativeCpuTime()

Obtain the cumulative CPU time since the system is on.

返回:

cumulative CPU time in milliseconds

getCpuUsage

public abstract float getCpuUsage()

Obtain the CPU usage % of the machine. Return -1 if it is unavailable

返回:

CPU usage in %

getProcResourceValues

public abstract ResourceCalculatorPlugin.ProcResourceValues getProcResourceValues()

Obtain resource status used by current process tree.

getResourceCalculatorPlugin

public static ResourceCalculatorPlugin getResourceCalculatorPlugin(Class<? extends ResourceCalculatorPlugin> clazz,
                                                   Configuration conf)

Get the ResourceCalculatorPlugin from the class name and configure it. If class name is null, this method will try and return a memory calculator plugin available for this system.

参数:

clazz - class-name

conf - configure the plugin with this.

返回:

ResourceCalculatorPlugin