Package org.palladiosimulator.protocom.resourcestrategies.activeresource.hdd

Class ReadLargeChunksDemand

java.lang.Object

org.palladiosimulator.protocom.resourcestrategies.activeresource.AbstractDemandStrategy

org.palladiosimulator.protocom.resourcestrategies.activeresource.hdd.ReadLargeChunksDemand

All Implemented Interfaces:

IDemandStrategy

public class ReadLargeChunksDemand
extends AbstractDemandStrategy
implements IDemandStrategy

Reads large chunks of data up to MAX_FILE_SIZE Byte (default 8 MB) from a predefined hard disk drive. During initialisation, it is checked whether there is a directory fileDirectory. If yes, it is used to read data from the hard disk drive. If not, the directory is created and a number of files given by numberOfFiles are written. The files size is maxFileSize. It is recommended to restart the application or even the whole machine if the files are written during initialisation. To avoid caching effects, each consume reads from another file until all files of the list are read. Then, the first file is read again. TODO: Initialisation of the HD, variable file sizes, variable number of files, scattered reads, writes, variable file sizes.

Nested Class Summary

Nested classes/interfaces inherited from class org.palladiosimulator.protocom.resourcestrategies.activeresource.AbstractDemandStrategy

AbstractDemandStrategy.ProcessingRate, AbstractDemandStrategy.Work

Field Summary

Fields inherited from class org.palladiosimulator.protocom.resourcestrategies.activeresource.AbstractDemandStrategy

CALIBRATION_PATH_CONFIG_KEY, defaultIterationCount, degreeOfAccuracy, WORKUNITS

Constructor Summary

Constructors

Constructor	Description
ReadLargeChunksDemand()
ReadLargeChunksDemand(File path, int maxFileSize)

Method Summary

Modifier and Type	Method	Description
void	cleanup()	Do cleanup work.
int	getMaxFileSize()
String	getName()	Template method to return the name of this strategy
ResourceTypeEnum	getStrategysResource()	Template method to return the real hardware resource type simulated by this strategy
void	initializeStrategy(DegreeOfAccuracyEnum degreeOfAccuracy, double processingRate)	Initialize the strategy and perform necessary calibrations
void	initializeStrategy(DegreeOfAccuracyEnum degreeOfAccuracy, double processingRate, String calibrationPath)	Initialize the strategy and perform necessary calibrations
protected void	run(long load)	Template method.

Methods inherited from class org.palladiosimulator.protocom.resourcestrategies.activeresource.AbstractDemandStrategy

calibrate, consume, debugEnabled, ensureCalibrationExists, formatDuration, getCalibrationFileName, getCalibrationPath, hasCalibrationTable, setCalibrationListener, setCalibrationTable, setDebug, setProperties, watchConsume

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.palladiosimulator.protocom.resourcestrategies.activeresource.IDemandStrategy

calibrate, consume, debugEnabled, ensureCalibrationExists, hasCalibrationTable, setCalibrationListener, setCalibrationTable, setDebug, setProperties

Constructor Details

ReadLargeChunksDemand

public ReadLargeChunksDemand()

ReadLargeChunksDemand

public ReadLargeChunksDemand(File path,
 int maxFileSize)

Method Details

run

protected void run(long load)

Description copied from class: AbstractDemandStrategy

Template method. This starts running the strategy with the parameter load

Specified by:

run in class AbstractDemandStrategy

Parameters:

load - Complexity parameter. Algorithm should take longer if parameter is larger, i.e., ideally run(a) < run(b) <==> a < b

getStrategysResource

public ResourceTypeEnum getStrategysResource()

Description copied from class: AbstractDemandStrategy

Template method to return the real hardware resource type simulated by this strategy

Specified by:

getStrategysResource in interface IDemandStrategy

Specified by:

getStrategysResource in class AbstractDemandStrategy

Returns:

The resource type we can simulate

See Also:

• IDemandStrategy.getStrategysResource()

initializeStrategy

public void initializeStrategy(DegreeOfAccuracyEnum degreeOfAccuracy,
 double processingRate,
 String calibrationPath)

Description copied from interface: IDemandStrategy

Initialize the strategy and perform necessary calibrations

Specified by:

initializeStrategy in interface IDemandStrategy

Overrides:

initializeStrategy in class AbstractDemandStrategy

Parameters:

degreeOfAccuracy - The degree of accuracy used for calibration: HIGH, MEDIUM, LOW WARNING: The use of HIGH can result in a significant increase in the execution time

processingRate - [units/seconds] The rate to initialize with (demand/processingRate = time)

calibrationPath - Path where the calibration is stored

See Also:

• IDemandStrategy.initializeStrategy(DegreeOfAccuracyEnum, double, String)

initializeStrategy

public void initializeStrategy(DegreeOfAccuracyEnum degreeOfAccuracy,
 double processingRate)

Description copied from interface: IDemandStrategy

Initialize the strategy and perform necessary calibrations

Specified by:

initializeStrategy in interface IDemandStrategy

Overrides:

initializeStrategy in class AbstractDemandStrategy

Parameters:

degreeOfAccuracy - The degree of accuracy used for calibration: HIGH, MEDIUM, LOW WARNING: The use of HIGH can result in a significant increase in the execution time

processingRate - [units/seconds] The rate to initialize with (demand/processingRate = time)

See Also:

• IDemandStrategy.initializeStrategy(DegreeOfAccuracyEnum, double)

getMaxFileSize

public int getMaxFileSize()

getName

public String getName()

Description copied from class: AbstractDemandStrategy

Template method to return the name of this strategy

Specified by:

getName in interface IDemandStrategy

Specified by:

getName in class AbstractDemandStrategy

Returns:

a string containing the name of the strategy

See Also:

• IDemandStrategy.getName()

cleanup

public void cleanup()

Description copied from interface: IDemandStrategy

Do cleanup work.

Specified by:

cleanup in interface IDemandStrategy