spark MapOutputStatistics 源码
spark MapOutputStatistics 代码
文件路径：/core/src/main/scala/org/apache/spark/MapOutputStatistics.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.
*/
package org.apache.spark
/**
* Holds statistics about the output sizes in a map stage. May become a DeveloperApi in the future.
*
* @param shuffleId ID of the shuffle
* @param bytesByPartitionId approximate number of output bytes for each map output partition
* (may be inexact due to use of compressed map statuses)
*/
private[spark] class MapOutputStatistics(val shuffleId: Int, val bytesByPartitionId: Array[Long])
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