spark ExecutorResourceInfo 源码
spark ExecutorResourceInfo 代码
文件路径：/core/src/main/scala/org/apache/spark/scheduler/ExecutorResourceInfo.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.scheduler
import org.apache.spark.resource.{ResourceAllocator, ResourceInformation}
/**
* Class to hold information about a type of Resource on an Executor. This information is managed
* by SchedulerBackend, and TaskScheduler shall schedule tasks on idle Executors based on the
* information.
* @param name Resource name
* @param addresses Resource addresses provided by the executor
* @param numParts Number of ways each resource is subdivided when scheduling tasks
*/
private[spark] class ExecutorResourceInfo(
name: String,
addresses: Seq[String],
numParts: Int)
extends ResourceInformation(name, addresses.toArray) with ResourceAllocator {
override protected def resourceName = this.name
override protected def resourceAddresses = this.addresses
override protected def slotsPerAddress: Int = numParts
def totalAddressAmount: Int = resourceAddresses.length * slotsPerAddress
}
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