org.apache.hadoop.util
Class ResourceCalculatorPlugin

java.lang.Object
  org.apache.hadoop.conf.Configured
      org.apache.hadoop.util.ResourceCalculatorPlugin

All Implemented Interfaces:

Configurable

Direct Known Subclasses:

LinuxResourceCalculatorPlugin

public abstract class ResourceCalculatorPlugin
extends Configured

Plugin to calculate resource information on the system.

Nested Class Summary

static class

ResourceCalculatorPlugin.ProcResourceValues

Constructor Summary

ResourceCalculatorPlugin()

Method Summary

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.

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceCalculatorPlugin

public ResourceCalculatorPlugin()

Method Detail

getVirtualMemorySize

public abstract long getVirtualMemorySize()

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

Returns:

virtual memory size in bytes.

getPhysicalMemorySize

public abstract long getPhysicalMemorySize()

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

Returns:

physical memory size bytes.

getAvailableVirtualMemorySize

public abstract long getAvailableVirtualMemorySize()

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

Returns:

available virtual memory size in bytes.

getAvailablePhysicalMemorySize

public abstract long getAvailablePhysicalMemorySize()

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

Returns:

available physical memory size bytes.

getNumProcessors

public abstract int getNumProcessors()

Obtain the total number of processors present on the system.

Returns:

number of processors

getCpuFrequency

public abstract long getCpuFrequency()

Obtain the CPU frequency of on the system.

Returns:

CPU frequency in kHz

getCumulativeCpuTime

public abstract long getCumulativeCpuTime()

Obtain the cumulative CPU time since the system is on.

Returns:

cumulative CPU time in milliseconds

getCpuUsage

public abstract float getCpuUsage()

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

Returns:

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.

Parameters:

clazz - class-name

conf - configure the plugin with this.

Returns:

ResourceCalculatorPlugin