spark MultiBroadcastTest 源码
spark MultiBroadcastTest 代码
文件路径：/examples/src/main/scala/org/apache/spark/examples/MultiBroadcastTest.scala
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// scalastyle:off println
package org.apache.spark.examples
import org.apache.spark.rdd.RDD
import org.apache.spark.sql.SparkSession
/**
* Usage: MultiBroadcastTest [partitions] [numElem]
*/
object MultiBroadcastTest {
def main(args: Array[String]): Unit = {
val spark = SparkSession
.builder
.appName("Multi-Broadcast Test")
.getOrCreate()
val slices = if (args.length > 0) args(0).toInt else 2
val num = if (args.length > 1) args(1).toInt else 1000000
val arr1 = new Array[Int](num)
for (i <- arr1.indices) {
arr1(i) = i
}
val arr2 = new Array[Int](num)
for (i <- arr2.indices) {
arr2(i) = i
}
val barr1 = spark.sparkContext.broadcast(arr1)
val barr2 = spark.sparkContext.broadcast(arr2)
val observedSizes: RDD[(Int, Int)] = spark.sparkContext.parallelize(1 to 10, slices).map { _ =>
(barr1.value.length, barr2.value.length)
}
// Collect the small RDD so we can print the observed sizes locally.
observedSizes.collect().foreach(i => println(i))
spark.stop()
}
}
// scalastyle:on println
相关信息
相关文章
spark AccumulatorMetricsTest 源码
0
赞
- 所属分类： 前端技术
- 本文标签：
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦