1 | /* |
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2 | * Licensed to the Apache Software Foundation (ASF) under one |
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3 | * or more contributor license agreements. See the NOTICE file |
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4 | * distributed with this work for additional information |
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5 | * regarding copyright ownership. The ASF licenses this file |
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6 | * to you under the Apache License, Version 2.0 (the |
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7 | * "License"); you may not use this file except in compliance |
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8 | * with the License. You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | package org.apache.hadoop.mapred; |
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19 | |
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20 | import junit.framework.TestCase; |
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21 | import org.apache.hadoop.mapred.JobClient.RawSplit; |
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22 | |
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23 | public class TestResourceEstimation extends TestCase { |
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24 | |
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25 | |
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26 | public void testResourceEstimator() throws Exception { |
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27 | final int maps = 100; |
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28 | final int reduces = 2; |
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29 | final int singleMapOutputSize = 1000; |
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30 | JobConf jc = new JobConf(); |
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31 | JobID jid = new JobID("testJT", 0); |
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32 | jc.setNumMapTasks(maps); |
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33 | jc.setNumReduceTasks(reduces); |
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34 | |
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35 | JobInProgress jip = new JobInProgress(jid, jc); |
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36 | //unfortunately, we can't set job input size from here. |
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37 | ResourceEstimator re = new ResourceEstimator(jip); |
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38 | |
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39 | for(int i = 0; i < maps / 10 ; ++i) { |
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40 | |
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41 | long estOutSize = re.getEstimatedMapOutputSize(); |
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42 | System.out.println(estOutSize); |
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43 | assertEquals(0, estOutSize); |
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44 | |
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45 | TaskStatus ts = new MapTaskStatus(); |
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46 | ts.setOutputSize(singleMapOutputSize); |
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47 | RawSplit split = new RawSplit(); |
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48 | split.setDataLength(0); |
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49 | TaskInProgress tip = new TaskInProgress(jid, "", split, null, jc, jip, 0); |
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50 | re.updateWithCompletedTask(ts, tip); |
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51 | } |
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52 | assertEquals(2* singleMapOutputSize, re.getEstimatedMapOutputSize()); |
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53 | assertEquals(2* singleMapOutputSize * maps / reduces, re.getEstimatedReduceInputSize()); |
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54 | |
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55 | } |
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56 | |
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57 | public void testWithNonZeroInput() throws Exception { |
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58 | final int maps = 100; |
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59 | final int reduces = 2; |
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60 | final int singleMapOutputSize = 1000; |
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61 | final int singleMapInputSize = 500; |
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62 | JobConf jc = new JobConf(); |
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63 | JobID jid = new JobID("testJT", 0); |
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64 | jc.setNumMapTasks(maps); |
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65 | jc.setNumReduceTasks(reduces); |
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66 | |
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67 | JobInProgress jip = new JobInProgress(jid, jc) { |
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68 | long getInputLength() { |
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69 | return singleMapInputSize*desiredMaps(); |
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70 | } |
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71 | }; |
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72 | ResourceEstimator re = new ResourceEstimator(jip); |
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73 | |
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74 | for(int i = 0; i < maps / 10 ; ++i) { |
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75 | |
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76 | long estOutSize = re.getEstimatedMapOutputSize(); |
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77 | System.out.println(estOutSize); |
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78 | assertEquals(0, estOutSize); |
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79 | |
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80 | TaskStatus ts = new MapTaskStatus(); |
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81 | ts.setOutputSize(singleMapOutputSize); |
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82 | RawSplit split = new RawSplit(); |
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83 | split.setDataLength(singleMapInputSize); |
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84 | TaskInProgress tip = new TaskInProgress(jid, "", split, null, jc, jip, 0); |
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85 | re.updateWithCompletedTask(ts, tip); |
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86 | } |
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87 | |
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88 | assertEquals(2* singleMapOutputSize, re.getEstimatedMapOutputSize()); |
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89 | assertEquals(2* singleMapOutputSize * maps / reduces, re.getEstimatedReduceInputSize()); |
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90 | |
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91 | //add one more map task with input size as 0 |
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92 | TaskStatus ts = new MapTaskStatus(); |
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93 | ts.setOutputSize(singleMapOutputSize); |
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94 | RawSplit split = new RawSplit(); |
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95 | split.setDataLength(0); |
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96 | TaskInProgress tip = new TaskInProgress(jid, "", split, null, jc, jip, 0); |
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97 | re.updateWithCompletedTask(ts, tip); |
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98 | |
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99 | long expectedTotalMapOutSize = (singleMapOutputSize*11) * |
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100 | ((maps*singleMapInputSize)+maps)/((singleMapInputSize+1)*10+1); |
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101 | assertEquals(2* expectedTotalMapOutSize/maps, re.getEstimatedMapOutputSize()); |
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102 | } |
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103 | |
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104 | } |
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