spark InputMetrics 源码
spark InputMetrics 代码
文件路径：/core/src/main/scala/org/apache/spark/executor/InputMetrics.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,
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package org.apache.spark.executor
import org.apache.spark.annotation.DeveloperApi
import org.apache.spark.util.LongAccumulator
/**
* :: DeveloperApi ::
* Method by which input data was read. Network means that the data was read over the network
* from a remote block manager (which may have stored the data on-disk or in-memory).
* Operations are not thread-safe.
*/
@DeveloperApi
object DataReadMethod extends Enumeration with Serializable {
type DataReadMethod = Value
val Memory, Disk, Hadoop, Network = Value
}
/**
* :: DeveloperApi ::
* A collection of accumulators that represents metrics about reading data from external systems.
*/
@DeveloperApi
class InputMetrics private[spark] () extends Serializable {
private[executor] val _bytesRead = new LongAccumulator
private[executor] val _recordsRead = new LongAccumulator
/**
* Total number of bytes read.
*/
def bytesRead: Long = _bytesRead.sum
/**
* Total number of records read.
*/
def recordsRead: Long = _recordsRead.sum
private[spark] def incBytesRead(v: Long): Unit = _bytesRead.add(v)
private[spark] def incRecordsRead(v: Long): Unit = _recordsRead.add(v)
private[spark] def setBytesRead(v: Long): Unit = _bytesRead.setValue(v)
// For test only
private[spark] def setRecordsRead(v: Long): Unit = _recordsRead.setValue(v)
}
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