| /* |
| * 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.pig.backend.hadoop.executionengine.tez.plan.optimizer; |
| |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.pig.backend.hadoop.executionengine.optimizer.SecondaryKeyOptimizer; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhysicalPlan; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.util.PlanHelper; |
| import org.apache.pig.backend.hadoop.executionengine.tez.plan.TezEdgeDescriptor; |
| import org.apache.pig.backend.hadoop.executionengine.tez.plan.TezOpPlanVisitor; |
| import org.apache.pig.backend.hadoop.executionengine.tez.plan.TezOperPlan; |
| import org.apache.pig.backend.hadoop.executionengine.tez.plan.TezOperator; |
| import org.apache.pig.backend.hadoop.executionengine.tez.plan.operator.POLocalRearrangeTez; |
| import org.apache.pig.backend.hadoop.executionengine.util.SecondaryKeyOptimizerUtil; |
| import org.apache.pig.backend.hadoop.executionengine.util.SecondaryKeyOptimizerUtil.SecondaryKeyOptimizerInfo; |
| import org.apache.pig.classification.InterfaceAudience; |
| import org.apache.pig.impl.plan.DependencyOrderWalker; |
| import org.apache.pig.impl.plan.VisitorException; |
| |
| @InterfaceAudience.Private |
| public class SecondaryKeyOptimizerTez extends TezOpPlanVisitor implements SecondaryKeyOptimizer { |
| |
| private static Log log = LogFactory.getLog(SecondaryKeyOptimizerTez.class); |
| |
| private int numSortRemoved = 0; |
| private int numDistinctChanged = 0; |
| private int numUseSecondaryKey = 0; |
| |
| public SecondaryKeyOptimizerTez(TezOperPlan plan) { |
| super(plan, new DependencyOrderWalker<TezOperator, TezOperPlan>(plan)); |
| } |
| |
| @Override |
| public void visitTezOp(TezOperator to) throws VisitorException { |
| |
| List<TezOperator> predecessors = mPlan.getPredecessors(to); |
| if (predecessors == null) { |
| return; |
| } |
| |
| // TODO: PIG-4685: SecondaryKeyOptimizerTez does not optimize cogroup |
| // Current code does not handle more than one predecessors |
| // even though it is possible. The problem is when we |
| // process the first predecessor, we remove the foreach inner |
| // operators from the reduce side, and the second predecessor |
| // cannot see them |
| if (predecessors.size() > 1) { |
| return; |
| } |
| TezOperator from = predecessors.get(0); |
| |
| List<POLocalRearrangeTez> rearranges = PlanHelper.getPhysicalOperators(from.plan, POLocalRearrangeTez.class); |
| if (rearranges.isEmpty()) { |
| return; |
| } |
| |
| POLocalRearrangeTez connectingLR = null; |
| PhysicalPlan rearrangePlan = from.plan; |
| for (POLocalRearrangeTez lr : rearranges) { |
| if (lr.containsOutputKey(to.getOperatorKey().toString())) { |
| connectingLR = lr; |
| break; |
| } |
| } |
| |
| if (connectingLR == null) { |
| return; |
| } |
| |
| // Detected the POLocalRearrange -> POPackage pattern |
| TezEdgeDescriptor inEdge = to.inEdges.get(from.getOperatorKey()); |
| // Only optimize for Cogroup case |
| if (from.isGlobalSort()) { |
| return; |
| } |
| |
| // If there is a custom partitioner do not do secondary key optimization. |
| if (inEdge.partitionerClass != null) { |
| return; |
| } |
| |
| if (from.plan.getOperator(connectingLR.getOperatorKey()) == null) { |
| // The POLocalRearrange is sub-plan of a POSplit |
| rearrangePlan = PlanHelper.getLocalRearrangePlanFromSplit(from.plan, connectingLR.getOperatorKey()); |
| } |
| |
| SecondaryKeyOptimizerUtil secondaryKeyOptUtil = new SecondaryKeyOptimizerUtil(); |
| SecondaryKeyOptimizerInfo info = secondaryKeyOptUtil.applySecondaryKeySort(rearrangePlan, to.plan); |
| if (info != null) { |
| numSortRemoved += info.getNumSortRemoved(); |
| numDistinctChanged += info.getNumDistinctChanged(); |
| numUseSecondaryKey += info.getNumUseSecondaryKey(); |
| if (info.isUseSecondaryKey()) { |
| // Set it on the receiving vertex and the connecting edge. |
| to.setUseSecondaryKey(true); |
| inEdge.setUseSecondaryKey(true); |
| inEdge.setSecondarySortOrder(info.getSecondarySortOrder()); |
| log.info("Using Secondary Key Optimization in the edge between vertex - " |
| + from.getOperatorKey() |
| + " and vertex - " |
| + to.getOperatorKey()); |
| } |
| } |
| } |
| |
| @Override |
| public int getNumSortRemoved() { |
| return numSortRemoved; |
| } |
| |
| @Override |
| public int getNumDistinctChanged() { |
| return numDistinctChanged; |
| } |
| |
| @Override |
| public int getNumUseSecondaryKey() { |
| return numUseSecondaryKey; |
| } |
| |
| } |