| /* |
| * 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.flink.table.resource.batch.parallelism.autoconf; |
| |
| import org.apache.flink.table.plan.nodes.exec.BatchExecNode; |
| import org.apache.flink.table.plan.nodes.exec.ExecNode; |
| import org.apache.flink.table.resource.batch.NodeRunningUnit; |
| import org.apache.flink.table.resource.batch.parallelism.ShuffleStage; |
| |
| import java.util.LinkedHashMap; |
| import java.util.LinkedHashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Adjust parallelism according to total cpu limit for batch node. |
| */ |
| public class BatchParallelismAdjuster { |
| |
| private final double totalCpu; |
| private Map<ShuffleStage, Set<NodeRunningUnit>> overlapRunningUnits = new LinkedHashMap<>(); |
| private Map<NodeRunningUnit, Set<ShuffleStage>> overlapShuffleStages = new LinkedHashMap<>(); |
| |
| public static void adjustParallelism(double totalCpu, |
| Map<BatchExecNode<?>, Set<NodeRunningUnit>> nodeRunningUnitMap, |
| Map<ExecNode<?, ?>, ShuffleStage> nodeShuffleStageMap) { |
| new BatchParallelismAdjuster(totalCpu).adjust(nodeRunningUnitMap, nodeShuffleStageMap); |
| } |
| |
| private BatchParallelismAdjuster(double totalCpu) { |
| this.totalCpu = totalCpu; |
| } |
| |
| private void adjust(Map<BatchExecNode<?>, Set<NodeRunningUnit>> nodeRunningUnitMap, Map<ExecNode<?, ?>, ShuffleStage> nodeShuffleStageMap) { |
| buildOverlap(nodeRunningUnitMap, nodeShuffleStageMap); |
| |
| for (ShuffleStage shuffleStage : nodeShuffleStageMap.values()) { |
| if (shuffleStage.isFinalParallelism()) { |
| continue; |
| } |
| |
| int parallelism = shuffleStage.getParallelism(); |
| for (NodeRunningUnit runningUnit : overlapRunningUnits.get(shuffleStage)) { |
| int result = calculateParallelism(overlapShuffleStages.get(runningUnit), shuffleStage.getParallelism()); |
| if (result < parallelism) { |
| parallelism = result; |
| } |
| } |
| shuffleStage.setParallelism(parallelism, true); |
| } |
| } |
| |
| private void buildOverlap(Map<BatchExecNode<?>, Set<NodeRunningUnit>> nodeRunningUnitMap, Map<ExecNode<?, ?>, ShuffleStage> nodeShuffleStageMap) { |
| for (ShuffleStage shuffleStage : nodeShuffleStageMap.values()) { |
| Set<NodeRunningUnit> runningUnitSet = new LinkedHashSet<>(); |
| for (ExecNode<?, ?> node : shuffleStage.getExecNodeSet()) { |
| runningUnitSet.addAll(nodeRunningUnitMap.get(node)); |
| } |
| overlapRunningUnits.put(shuffleStage, runningUnitSet); |
| } |
| |
| for (Set<NodeRunningUnit> runningUnitSet : nodeRunningUnitMap.values()) { |
| for (NodeRunningUnit runningUnit : runningUnitSet) { |
| if (overlapShuffleStages.containsKey(runningUnit)) { |
| continue; |
| } |
| Set<ShuffleStage> shuffleStageSet = new LinkedHashSet<>(); |
| for (ExecNode<?, ?> node : runningUnit.getNodeSet()) { |
| shuffleStageSet.add(nodeShuffleStageMap.get(node)); |
| } |
| overlapShuffleStages.put(runningUnit, shuffleStageSet); |
| } |
| } |
| } |
| |
| private int calculateParallelism(Set<ShuffleStage> shuffleStages, int parallelism) { |
| double remain = totalCpu; |
| double need = 0d; |
| for (ShuffleStage shuffleStage : shuffleStages) { |
| if (shuffleStage.isFinalParallelism()) { |
| remain -= getCpu(shuffleStage, shuffleStage.getParallelism()); |
| } else { |
| remain -= getCpu(shuffleStage, 1); |
| need += getCpu(shuffleStage, shuffleStage.getParallelism() - 1); |
| } |
| } |
| if (remain < 0) { |
| throw new IllegalArgumentException("adjust parallelism error, fixed resource > remain resource."); |
| } |
| if (remain > need) { |
| return parallelism; |
| } else { |
| double ratio = remain / need; |
| return (int) ((parallelism - 1) * ratio) + 1; |
| } |
| } |
| |
| private double getCpu(ShuffleStage shuffleStage, int parallelism) { |
| double totalCpu = 0; |
| for (ExecNode<?, ?> node : shuffleStage.getExecNodeSet()) { |
| totalCpu = Math.max(totalCpu, node.getResource().getCpu()); |
| } |
| totalCpu *= parallelism; |
| return totalCpu; |
| } |
| } |