Package pyspark :: Module storagelevel :: Class StorageLevel

Class StorageLevel

Flags for controlling the storage of an RDD. Each StorageLevel records whether to use memory, whether to drop the RDD to disk if it falls out of memory, whether to keep the data in memory in a serialized format, and whether to replicate the RDD partitions on multiple nodes. Also contains static constants for some commonly used storage levels, such as MEMORY_ONLY.

Instance Methods

__init__(self, useDisk, useMemory, deserialized, replication=1)

source code

Class Variables
	DISK_ONLY = `StorageLevel(True, False, False)`
	DISK_ONLY_2 = `StorageLevel(True, False, False, 2)`
	MEMORY_ONLY = `StorageLevel(False, True, True)`
	MEMORY_ONLY_2 = `StorageLevel(False, True, True, 2)`
	MEMORY_ONLY_SER = `StorageLevel(False, True, False)`
	MEMORY_ONLY_SER_2 = `StorageLevel(False, True, False, 2)`
	MEMORY_AND_DISK = `StorageLevel(True, True, True)`
	MEMORY_AND_DISK_2 = `StorageLevel(True, True, True, 2)`
	MEMORY_AND_DISK_SER = `StorageLevel(True, True, False)`
	MEMORY_AND_DISK_SER_2 = `StorageLevel(True, True, False, 2)`