| /** |
| * 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.hadoop.mapred; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.tools.rumen.JobStory; |
| import org.apache.hadoop.tools.rumen.JobStoryProducer; |
| import org.apache.hadoop.tools.rumen.Pre21JobHistoryConstants; |
| import org.apache.hadoop.tools.rumen.ZombieCluster; |
| import org.apache.hadoop.tools.rumen.ZombieJob; |
| import org.apache.hadoop.tools.rumen.ZombieJobProducer; |
| |
| /** |
| * This class creates {@link JobStory} objects from trace file in rumen format. |
| * It is a proxy class over {@link ZombieJobProducer}, and adjusts the |
| * submission time to be aligned with simulation time. |
| */ |
| public class SimulatorJobStoryProducer implements JobStoryProducer { |
| private final ZombieJobProducer producer; |
| private final long firstJobStartTime; |
| private long relativeTime = -1; |
| private boolean firstJob = true; |
| |
| public SimulatorJobStoryProducer(Path path, ZombieCluster cluster, |
| long firstJobStartTime, Configuration conf) throws IOException { |
| this(path, cluster, firstJobStartTime, conf, System.nanoTime()); |
| } |
| |
| public SimulatorJobStoryProducer(Path path, ZombieCluster cluster, |
| long firstJobStartTime, Configuration conf, long seed) throws IOException { |
| producer = new ZombieJobProducer(path, cluster, conf, seed); |
| this.firstJobStartTime = firstJobStartTime; |
| } |
| |
| /** |
| * Filter some jobs being fed to the simulator. For now, we filter out killed |
| * jobs to facilitate debugging. |
| * |
| * @throws IOException |
| */ |
| private JobStory getNextJobFiltered() throws IOException { |
| while (true) { |
| ZombieJob job = producer.getNextJob(); |
| if (job == null) { |
| return null; |
| } |
| if (job.getOutcome() == Pre21JobHistoryConstants.Values.KILLED) { |
| continue; |
| } |
| if (job.getNumberMaps() == 0) { |
| continue; |
| } |
| if (job.getNumLoggedMaps() == 0) { |
| continue; |
| } |
| return job; |
| } |
| } |
| |
| @Override |
| public JobStory getNextJob() throws IOException { |
| JobStory job = getNextJobFiltered(); |
| if (job == null) |
| return null; |
| if (firstJob) { |
| firstJob = false; |
| relativeTime = job.getSubmissionTime() - firstJobStartTime; |
| } |
| |
| return new SimulatorJobStory(job, job.getSubmissionTime() - relativeTime); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| producer.close(); |
| } |
| } |