| /* |
| * 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.eagle.jpm.analyzer.mr.suggestion; |
| |
| import org.apache.eagle.jpm.analyzer.Processor; |
| import org.apache.eagle.jpm.analyzer.meta.model.MapReduceAnalyzerEntity; |
| import org.apache.eagle.jpm.analyzer.publisher.Result; |
| import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; |
| |
| public class MapReduceSplitSettingProcessor implements Processor<MapReduceAnalyzerEntity> { |
| |
| private MapReduceJobSuggestionContext context; |
| |
| public MapReduceSplitSettingProcessor(MapReduceJobSuggestionContext context) { |
| this.context = context; |
| } |
| |
| @Override |
| public Result.ProcessorResult process(MapReduceAnalyzerEntity jobAnalysisEntity) { |
| StringBuilder sb = new StringBuilder(); |
| |
| if (context.getJobconf().getLong(FileInputFormat.SPLIT_MINSIZE, 0) > 1) { |
| sb.append("Best practice: don't set " + FileInputFormat.SPLIT_MINSIZE); |
| sb.append(", because it may lower data locality, hence maps will run slower.\n"); |
| return new Result.ProcessorResult(Result.RuleType.SPLIT, Result.ResultLevel.INFO, sb.toString()); |
| } |
| return null; |
| } |
| } |