org.deeplearning4j.config

Class DL4JSystemProperties

java.lang.Object

org.deeplearning4j.config.DL4JSystemProperties

public class DL4JSystemProperties
extends Object

DL4JSystemProperties class contains the system properties that can be used to configure various aspects of DL4J. See the javadoc of each property for details

Author:

Alex Black

Field Summary

Fields

Modifier and Type	Field and Description
static String	CHART_MAX_POINTS_PROPERTY Applicability: deeplearning4j-ui_2.xx Description: The DL4J training UI (StatsListener + UIServer.getInstance().attach(ss)) will subsample the number of chart points when a lot of data is present - i.e., only a maximum number of points will be shown on each chart.
static String	CRASH_DUMP_ENABLED_PROPERTY Applicability: deeplearning4j-nn Description: DL4J writes some crash dumps to disk when an OOM exception occurs - this functionality is enabled by default.
static String	CRASH_DUMP_OUTPUT_DIRECTORY_PROPERTY Applicability: deeplearning4j-nn Description: DL4J writes some crash dumps to disk when an OOM exception occurs - this functionality is enabled by default.
static String	CUSTOM_REGISTRATION_PROPERTY Applicability: deeplearning4j-nn Description: Used for loading legacy format JSON containing custom layers.
static String	DL4J_RESOURCES_BASE_URL_PROPERTY Applicability: Numerous modules, including deeplearning4j-datasets and deeplearning4j-zoo Description: Used to set the base URL for hosting of resources such as datasets (like MNIST) and pretrained models in the model zoo.
static String	DL4J_RESOURCES_DIR_PROPERTY Applicability: Numerous modules, including deeplearning4j-datasets and deeplearning4j-zoo Description: Used to set the local location for downloaded remote resources such as datasets (like MNIST) and pretrained models in the model zoo.
static String	NTP_SOURCE_SERVER_PROPERTY Applicability: dl4j-spark_2.xx - NTPTimeSource class (mainly used in ParameterAveragingTrainingMaster when stats collection is enabled; not enabled by default) Description: This sets the NTP (network time protocol) server to be used when collecting stats.
static String	NTP_SOURCE_UPDATE_FREQUENCY_MS_PROPERTY Applicability: dl4j-spark_2.xx - NTPTimeSource class (mainly used in ParameterAveragingTrainingMaster when stats collection is enabled; not enabled by default) Description: This sets the NTP (network time protocol) update frequency in milliseconds.
static String	TIMESOURCE_CLASSNAME_PROPERTY Applicability: dl4j-spark_2.xx - mainly used in ParameterAveragingTrainingMaster when stats collection is enabled; not enabled by default Description: This sets the time source to use for spark stats.
static String	UI_SERVER_PORT_PROPERTY Applicability: deeplearning4j-play (deeplearning4j-ui_2.xx) Description: This property sets the port that the UI will be available on.

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

DL4J_RESOURCES_DIR_PROPERTY

public static final String DL4J_RESOURCES_DIR_PROPERTY

Applicability: Numerous modules, including deeplearning4j-datasets and deeplearning4j-zoo
Description: Used to set the local location for downloaded remote resources such as datasets (like MNIST) and pretrained models in the model zoo. Default value is set via new File(System.getProperty("user.home"), ".deeplearning4j"). Setting this can be useful if the system drive has limited space/performance, a shared location for all users should be used instead, or if user.home isn't set for some reason.

See Also:

Constant Field Values

DL4J_RESOURCES_BASE_URL_PROPERTY

public static final String DL4J_RESOURCES_BASE_URL_PROPERTY

Applicability: Numerous modules, including deeplearning4j-datasets and deeplearning4j-zoo
Description: Used to set the base URL for hosting of resources such as datasets (like MNIST) and pretrained models in the model zoo. This is provided as a fallback in case the location of these files changes; it also allows for (in principle) a local mirror of these files.
NOTE: Changing this to a location without the same files and file structure as the DL4J resource hosting is likely to break external resource dowloading in DL4J!

See Also:

Constant Field Values

CUSTOM_REGISTRATION_PROPERTY

public static final String CUSTOM_REGISTRATION_PROPERTY

Applicability: deeplearning4j-nn
Description: Used for loading legacy format JSON containing custom layers. This system property is provided as an alternative to NeuralNetConfiguration#registerLegacyCustomClassesForJSON(Class[]). Classes are specified in comma-separated format.
This is required ONLY when ALL of the following conditions are met:
1. You want to load a serialized net, saved in 1.0.0-alpha or before, AND
2. The serialized net has a custom Layer, GraphVertex, etc (i.e., one not defined in DL4J), AND
3. You haven't already called NeuralNetConfiguration#registerLegacyCustomClassesForJSON(Class[])

See Also:

Constant Field Values

CRASH_DUMP_ENABLED_PROPERTY

public static final String CRASH_DUMP_ENABLED_PROPERTY

Applicability: deeplearning4j-nn
Description: DL4J writes some crash dumps to disk when an OOM exception occurs - this functionality is enabled by default. This is to help users identify the cause of the OOM - i.e., where native memory is actually consumed. This system property can be used to disable memory crash reporting.

See Also:

For configuring the output directory, Constant Field Values

CRASH_DUMP_OUTPUT_DIRECTORY_PROPERTY

public static final String CRASH_DUMP_OUTPUT_DIRECTORY_PROPERTY

Applicability: deeplearning4j-nn
Description: DL4J writes some crash dumps to disk when an OOM exception occurs - this functionality is enabled by default. This system property can be use to customize the output directory for memory crash reporting. By default, the current working directory (System.getProperty("user.dir") or new File("")) will be used

See Also:

To disable crash dump reporting, Constant Field Values

CHART_MAX_POINTS_PROPERTY

public static final String CHART_MAX_POINTS_PROPERTY

Applicability: deeplearning4j-ui_2.xx
Description: The DL4J training UI (StatsListener + UIServer.getInstance().attach(ss)) will subsample the number of chart points when a lot of data is present - i.e., only a maximum number of points will be shown on each chart. This is to reduce the UI bandwidth requirements and client-side rendering cost. To increase the number of points in charts, set this property to a larger value. Default: 512 values

See Also:

Constant Field Values

UI_SERVER_PORT_PROPERTY

public static final String UI_SERVER_PORT_PROPERTY

Applicability: deeplearning4j-play (deeplearning4j-ui_2.xx)
Description: This property sets the port that the UI will be available on. Default port: 9000. Set to 0 for a random port.

See Also:

Constant Field Values

NTP_SOURCE_SERVER_PROPERTY

public static final String NTP_SOURCE_SERVER_PROPERTY

Applicability: dl4j-spark_2.xx - NTPTimeSource class (mainly used in ParameterAveragingTrainingMaster when stats collection is enabled; not enabled by default)
Description: This sets the NTP (network time protocol) server to be used when collecting stats. Default: 0.pool.ntp.org

See Also:

Constant Field Values

NTP_SOURCE_UPDATE_FREQUENCY_MS_PROPERTY

public static final String NTP_SOURCE_UPDATE_FREQUENCY_MS_PROPERTY

Applicability: dl4j-spark_2.xx - NTPTimeSource class (mainly used in ParameterAveragingTrainingMaster when stats collection is enabled; not enabled by default)
Description: This sets the NTP (network time protocol) update frequency in milliseconds. Default: 1800000 (30 minutes)

See Also:

Constant Field Values

TIMESOURCE_CLASSNAME_PROPERTY

public static final String TIMESOURCE_CLASSNAME_PROPERTY

Applicability: dl4j-spark_2.xx - mainly used in ParameterAveragingTrainingMaster when stats collection is enabled; not enabled by default
Description: This sets the time source to use for spark stats. Default: org.deeplearning4j.spark.time.NTPTimeSource

See Also:

Constant Field Values