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package org

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package apache

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org
package spark
Core Spark functionality.
Core Spark functionality. org.apache.spark.SparkContext serves as the main entry point to Spark, while org.apache.spark.rdd.RDD is the data type representing a distributed collection, and provides most parallel operations.
In addition, org.apache.spark.rdd.PairRDDFunctions contains operations available only on RDDs of key-value pairs, such as groupByKey and join; org.apache.spark.rdd.DoubleRDDFunctions contains operations available only on RDDs of Doubles; and org.apache.spark.rdd.SequenceFileRDDFunctions contains operations available on RDDs that can be saved as SequenceFiles. These operations are automatically available on any RDD of the right type (e.g. RDD[(Int, Int)] through implicit conversions.
Java programmers should reference the org.apache.spark.api.java package for Spark programming APIs in Java.
Classes and methods marked with Experimental are user-facing features which have not been officially adopted by the Spark project. These are subject to change or removal in minor releases.
Classes and methods marked with Developer API are intended for advanced users want to extend Spark through lower level interfaces. These are subject to changes or removal in minor releases.

Definition Classes
apache
package rdd
Provides several RDD implementations.
Provides several RDD implementations. See org.apache.spark.rdd.RDD.

Definition Classes
spark
AsyncRDDActions
CoGroupedRDD
DoubleRDDFunctions
HadoopRDD
JdbcRDD
NewHadoopRDD
OrderedRDDFunctions
PairRDDFunctions
PartitionCoalescer
PartitionGroup
PartitionPruningRDD
RDD
RDDBarrier
SequenceFileRDDFunctions
ShuffledRDD
UnionRDD

org.apache.spark.rdd

PartitionCoalescer

trait PartitionCoalescer extends AnyRef

::DeveloperApi:: A PartitionCoalescer defines how to coalesce the partitions of a given RDD.

Annotations: @DeveloperApi()
Source: coalesce-public.scala

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PartitionCoalescer
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abstract def coalesce(maxPartitions: Int, parent: RDD[_]): Array[PartitionGroup]
Coalesce the partitions of the given RDD.
Coalesce the partitions of the given RDD.
maxPartitions
the maximum number of partitions to have after coalescing
parent
the parent RDD whose partitions to coalesce
returns
an array of PartitionGroups, where each element is itself an array of Partitions and represents a partition after coalescing is performed.

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PartitionCoalescer

trait PartitionCoalescer extends AnyRef

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PartitionCoalescer 

trait PartitionCoalescer extends AnyRef

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PartitionCoalescer