| /** |
| * 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 org.apache.hadoop.mapreduce.split.JobSplit; |
| |
| import junit.framework.TestCase; |
| |
| public class TestResourceEstimation extends TestCase { |
| |
| |
| public void testResourceEstimator() throws Exception { |
| final int maps = 100; |
| final int reduces = 2; |
| final int singleMapOutputSize = 1000; |
| JobConf jc = new JobConf(); |
| JobID jid = new JobID("testJT", 0); |
| jc.setNumMapTasks(maps); |
| jc.setNumReduceTasks(reduces); |
| |
| JobInProgress jip = new JobInProgress(jid, jc, |
| UtilsForTests.getJobTracker()); |
| //unfortunately, we can't set job input size from here. |
| ResourceEstimator re = new ResourceEstimator(jip); |
| |
| for(int i = 0; i < maps / 10 ; ++i) { |
| |
| long estOutSize = re.getEstimatedMapOutputSize(); |
| System.out.println(estOutSize); |
| assertEquals(0, estOutSize); |
| |
| TaskStatus ts = new MapTaskStatus(); |
| ts.setOutputSize(singleMapOutputSize); |
| JobSplit.TaskSplitMetaInfo split = |
| new JobSplit.TaskSplitMetaInfo(new String[0], 0, 0); |
| TaskInProgress tip = new TaskInProgress(jid, "", split, null, jc, jip, 0, 1); |
| re.updateWithCompletedTask(ts, tip); |
| } |
| assertEquals(2* singleMapOutputSize, re.getEstimatedMapOutputSize()); |
| assertEquals(2* singleMapOutputSize * maps / reduces, re.getEstimatedReduceInputSize()); |
| |
| } |
| |
| public void testWithNonZeroInput() throws Exception { |
| final int maps = 100; |
| final int reduces = 2; |
| final int singleMapOutputSize = 1000; |
| final int singleMapInputSize = 500; |
| JobConf jc = new JobConf(); |
| JobID jid = new JobID("testJT", 0); |
| jc.setNumMapTasks(maps); |
| jc.setNumReduceTasks(reduces); |
| |
| JobInProgress jip = new JobInProgress(jid, jc, |
| UtilsForTests.getJobTracker()) { |
| long getInputLength() { |
| return singleMapInputSize*desiredMaps(); |
| } |
| }; |
| ResourceEstimator re = new ResourceEstimator(jip); |
| |
| for(int i = 0; i < maps / 10 ; ++i) { |
| |
| long estOutSize = re.getEstimatedMapOutputSize(); |
| System.out.println(estOutSize); |
| assertEquals(0, estOutSize); |
| |
| TaskStatus ts = new MapTaskStatus(); |
| ts.setOutputSize(singleMapOutputSize); |
| JobSplit.TaskSplitMetaInfo split = |
| new JobSplit.TaskSplitMetaInfo(new String[0], 0, |
| singleMapInputSize); |
| TaskInProgress tip = new TaskInProgress(jid, "", split, null, jc, jip, 0, 1); |
| re.updateWithCompletedTask(ts, tip); |
| } |
| |
| assertEquals(2* singleMapOutputSize, re.getEstimatedMapOutputSize()); |
| assertEquals(2* singleMapOutputSize * maps / reduces, re.getEstimatedReduceInputSize()); |
| |
| //add one more map task with input size as 0 |
| TaskStatus ts = new MapTaskStatus(); |
| ts.setOutputSize(singleMapOutputSize); |
| JobSplit.TaskSplitMetaInfo split = |
| new JobSplit.TaskSplitMetaInfo(new String[0], 0, 0); |
| TaskInProgress tip = new TaskInProgress(jid, "", split, null, jc, jip, 0, 1); |
| re.updateWithCompletedTask(ts, tip); |
| |
| long expectedTotalMapOutSize = (singleMapOutputSize*11) * |
| ((maps*singleMapInputSize)+maps)/((singleMapInputSize+1)*10+1); |
| assertEquals(2* expectedTotalMapOutSize/maps, re.getEstimatedMapOutputSize()); |
| } |
| |
| } |