class ShuffleDependency[K, V, C] extends Dependency[Product2[K, V]] with Logging
:: DeveloperApi :: Represents a dependency on the output of a shuffle stage. Note that in the case of shuffle, the RDD is transient since we don't need it on the executor side.
- Annotations
- @DeveloperApi()
- Source
- Dependency.scala
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- ShuffleDependency
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- Dependency
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Instance Constructors
- new ShuffleDependency(_rdd: RDD[_ <: Product2[K, V]], partitioner: Partitioner, serializer: Serializer = SparkEnv.get.serializer, keyOrdering: Option[Ordering[K]] = None, aggregator: Option[Aggregator[K, V, C]] = None, mapSideCombine: Boolean = false, shuffleWriterProcessor: ShuffleWriteProcessor = new ShuffleWriteProcessor)(implicit arg0: ClassTag[K], arg1: ClassTag[V], arg2: ClassTag[C])
- _rdd
the parent RDD
- partitioner
partitioner used to partition the shuffle output
- serializer
Serializer to use. If not set explicitly then the default serializer, as specified by
spark.serializerconfig option, will be used.- keyOrdering
key ordering for RDD's shuffles
- aggregator
map/reduce-side aggregator for RDD's shuffle
- mapSideCombine
whether to perform partial aggregation (also known as map-side combine)
- shuffleWriterProcessor
the processor to control the write behavior in ShuffleMapTask
Type Members
- implicit class LogStringContext extends AnyRef
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- Logging
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- final def !=(arg0: Any): Boolean
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- final def ##: Int
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- val aggregator: Option[Aggregator[K, V, C]]
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- def getMergerLocs: Seq[BlockManagerId]
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- def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
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- def initializeLogIfNecessary(isInterpreter: Boolean): Unit
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- def isTraceEnabled(): Boolean
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- val keyOrdering: Option[Ordering[K]]
- def log: Logger
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- def logDebug(msg: => String, throwable: Throwable): Unit
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- def logDebug(entry: LogEntry, throwable: Throwable): Unit
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- def logDebug(entry: LogEntry): Unit
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- def logDebug(msg: => String): Unit
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- def logError(msg: => String, throwable: Throwable): Unit
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- def logError(entry: LogEntry, throwable: Throwable): Unit
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- def logError(entry: LogEntry): Unit
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- def logError(msg: => String): Unit
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- def logInfo(msg: => String, throwable: Throwable): Unit
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- def logInfo(entry: LogEntry, throwable: Throwable): Unit
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- def logInfo(entry: LogEntry): Unit
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- def logInfo(msg: => String): Unit
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- def logName: String
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- def logTrace(msg: => String, throwable: Throwable): Unit
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- def logTrace(entry: LogEntry, throwable: Throwable): Unit
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- def logTrace(entry: LogEntry): Unit
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- def logTrace(msg: => String): Unit
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- def logWarning(msg: => String, throwable: Throwable): Unit
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- def logWarning(entry: LogEntry, throwable: Throwable): Unit
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- def logWarning(entry: LogEntry): Unit
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- def logWarning(msg: => String): Unit
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- protected
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- val mapSideCombine: Boolean
- final def ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- def newShuffleMergeState(): Unit
- final def notify(): Unit
- Definition Classes
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- @IntrinsicCandidate() @native()
- final def notifyAll(): Unit
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- @IntrinsicCandidate() @native()
- val partitioner: Partitioner
- def rdd: RDD[Product2[K, V]]
- Definition Classes
- ShuffleDependency → Dependency
- val serializer: Serializer
- def setMergerLocs(mergerLocs: Seq[BlockManagerId]): Unit
- val shuffleHandle: ShuffleHandle
- val shuffleId: Int
- def shuffleMergeAllowed: Boolean
- def shuffleMergeEnabled: Boolean
- def shuffleMergeFinalized: Boolean
Returns true if push-based shuffle is disabled or if the shuffle merge for this shuffle is finalized.
- def shuffleMergeId: Int
- val shuffleWriterProcessor: ShuffleWriteProcessor
- final def synchronized[T0](arg0: => T0): T0
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- def toString(): String
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- final def wait(arg0: Long, arg1: Int): Unit
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- def withLogContext(context: HashMap[String, String])(body: => Unit): Unit
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Deprecated Value Members
- def finalize(): Unit
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- @throws(classOf[java.lang.Throwable]) @Deprecated
- Deprecated
(Since version 9)