com.google.appengine.tools.mapreduce.impl

Class MapReduceConstants

java.lang.Object

com.google.appengine.tools.mapreduce.impl.MapReduceConstants

public class MapReduceConstants
extends Object

Author:

ohler@google.com (Christian Ohler)

Field Summary

Fields

Modifier and Type	Field and Description
static int	ASSUMED_BASE_MEMORY_PER_REQUEST
static int	ASSUMED_JVM_RAM_OVERHEAD Used as a rough estimate of how much memory is needed as a baseline independent of any specific allocations.
static int	DEFAULT_IO_BUFFER_SIZE The size of the input buffer passed to the GCS readers / writers.
static int	GCS_IO_BLOCK_SIZE
static com.google.appengine.tools.cloudstorage.RetryParams	GCS_RETRY_PARAMETERS
static String	MAP_OUTPUT_DIR_FORMAT
static String	MAP_OUTPUT_MIME_TYPE
static int	MAX_LAST_ITEM_STRING_SIZE Maximum display size of the lastItem in the UI.
static int	MAX_REDUCE_SHARDS
static String	MERGE_OUTPUT_DIR_FORMAT
static String	REDUCE_INPUT_MIME_TYPE
static String	SORT_OUTPUT_DIR_FORMAT

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

MAP_OUTPUT_DIR_FORMAT

public static final String MAP_OUTPUT_DIR_FORMAT

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Constant Field Values

SORT_OUTPUT_DIR_FORMAT

public static final String SORT_OUTPUT_DIR_FORMAT

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Constant Field Values

MERGE_OUTPUT_DIR_FORMAT

public static final String MERGE_OUTPUT_DIR_FORMAT

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Constant Field Values

ASSUMED_BASE_MEMORY_PER_REQUEST

public static final int ASSUMED_BASE_MEMORY_PER_REQUEST

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Constant Field Values

ASSUMED_JVM_RAM_OVERHEAD

public static final int ASSUMED_JVM_RAM_OVERHEAD

Used as a rough estimate of how much memory is needed as a baseline independent of any specific allocations.

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Constant Field Values

DEFAULT_IO_BUFFER_SIZE

public static final int DEFAULT_IO_BUFFER_SIZE

The size of the input buffer passed to the GCS readers / writers. Is widely used by size estimates.

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Constant Field Values

GCS_IO_BLOCK_SIZE

public static final int GCS_IO_BLOCK_SIZE

MAP_OUTPUT_MIME_TYPE

public static final String MAP_OUTPUT_MIME_TYPE

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Constant Field Values

REDUCE_INPUT_MIME_TYPE

public static final String REDUCE_INPUT_MIME_TYPE

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Constant Field Values

MAX_LAST_ITEM_STRING_SIZE

public static final int MAX_LAST_ITEM_STRING_SIZE

Maximum display size of the lastItem in the UI.

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Constant Field Values

MAX_REDUCE_SHARDS

public static final int MAX_REDUCE_SHARDS

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Constant Field Values

GCS_RETRY_PARAMETERS

public static final com.google.appengine.tools.cloudstorage.RetryParams GCS_RETRY_PARAMETERS