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author Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
date Sun, 11 Jul 2010 23:09:37 +0900
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1 <html>
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2 <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
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3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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4 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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5
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6 <html xmlns="http://www.w3.org/1999/xhtml">
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7
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8 <head>
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9 <title>琉球大学並列信頼研の紹介</title>
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10 <!-- metadata -->
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11 <meta name="generator" content="S5" />
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12 <meta name="version" content="S5 1.2a2" />
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13 <meta name="author" content="Eric A. Meyer" />
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14 <meta name="company" content="Complex Spiral Consulting" />
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15 <!-- configuration parameters -->
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16 <meta name="defaultView" content="slideshow" />
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17 <meta name="controlVis" content="hidden" />
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18 <!-- style sheet links -->
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19 <link rel="stylesheet" href="ui/default/slides.css" type="text/css" media="projec
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20 tion" id="slideProj" />
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21 <link rel="stylesheet" href="ui/default/outline.css" type="text/css" media="scree
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22 n" id="outlineStyle" />
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23 <link rel="stylesheet" href="ui/default/print.css" type="text/css" media="print"
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24 id="slidePrint" />
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25 <link rel="stylesheet" href="ui/default/opera.css" type="text/css" media="project
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26 ion" id="operaFix" />
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27 <!-- S5 JS -->
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28 <script src="ui/default/slides.js" type="text/javascript"></script>
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29 </head>
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30 <body>
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31
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32 <div class="layout">
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33 <div id="controls"><!-- DO NOT EDIT --></div>
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34 <div id="currentSlide"><!-- DO NOT EDIT --></div>
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35 <div id="header"></div>
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36 <div id="footer">
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37 <h1>琉球大学並列信頼研の紹介</h1>
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38 <h2></h2>
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39 </div>
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40 </div>
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41
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42 <ol class="xoxo presentation">
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43
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44 </li>
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45 <li class="slide">
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46 <h1> Cassandra Project</h1>
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47 <p>琉球大学情報工学科並列信頼研<br>
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48 <p>准教授 河野真治<br>
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49 <p></li>
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50 <li class="slide">
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51 <h1>琉球大学って</h1>
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52 <STYLE type="text/css"><br>
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53 .floatright {float: right;}<br>
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54 .floatleft {float: left;}<br>
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55 </STYLE><br>
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56 <div style="float: left;"><br>
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57 <pre> 沖縄本島の中部<br>
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58 普天間基地のそば<br>
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59 那覇から30分ぐらい<br>
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60 宜野座はさらに北へ30分<br>
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61 </pre>
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62 </div><br>
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63 <p><img style="float: right;" src="fig/map.jpg" height="500"><br>
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64 <p></li>
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65 <li class="slide">
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66 <h1>琉球大学って</h1>
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67 <pre> もちろん偏差値的に高い大学ではないですが...<br>
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68 沖縄にある7つの大学の中ではトップ<br>
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69 優秀な学生は優秀です (沖縄に残りたい学生がいる)<br>
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70 そうでなければ沖縄になんか来てません<br>
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71 </pre>
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72 </li>
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73 <li class="slide">
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74 <h1>並列信頼研の研究テーマ</h1>
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75 <p>並列実行がテーマですが、動くだけでなく「信頼性」がなければいけません。<br>
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76 <p><pre> プログラミング言語 (CbC)<br>
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77 PS3 (Cell) のTask Manager/Rendering Engine<br>
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78 分散プログラム (Federated Linda)<br>
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79 プログラム検証<br>
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80 </pre>
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81 </li>
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82 <li class="slide">
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83 <h1>プログラミング言語 (CbC)</h1>
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84 <p><pre> 継続と言う概念を基本とした C 言語<br>
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85 状態遷移系、ハードウェア、並列処理<br>
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86 などに向いてます。gcc を変更する形で実装。<br>
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87 </pre>
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88 </li>
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89 <li class="slide">
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90 <h1>PS3 (Cell) のTask Manager</h1>
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91 <p><pre> Software Rendering Engine<br>
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92 ゲームを作るための環境<br>
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93 Cell は 6 Core => 並列処理が必須<br>
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94 Task 単位でパイプラインで実行<br>
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95 (Gameやりたくて入って来る学生も...)<br>
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96 </pre>
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97 </li>
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98 <li class="slide">
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99 <h1>分散プログラム (Federated Linda)</h1>
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100 <p><pre> Linda Server<br>
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101 Tuple を in/out/read する簡単なデータベース<br>
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102 Single Threaded な Linda Server 多数接続<br>
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103 Linda Serverを相互に接続するメタエンジン<br>
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104 分散プログラムの実験に使う<br>
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105 Cassandra に継る研究<br>
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106 </pre>
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107 </li>
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108 <li class="slide">
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109 <h1>Cassandra に関する共同研究</h1>
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110 <p>Cassandra とは?<br>
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111 <pre> 分散データベース<br>
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112 複数のノードにレコードが複数格納される<br>
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113 Key Value Store<br>
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114 SQLではなく、get/set と言う簡潔なAPI<br>
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115 Java で実装された Open Source<br>
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116 Linux 等と同様、Community により開発されている<br>
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117 SEDA staged event-driven architecture<br>
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118 </pre>
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119 </li>
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120 <li class="slide">
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121 <h1>SEDA staged event-driven architecture</h1>
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122 <p>2001年にUCBで提案された、複数のスレッドを非同期に繋げることによるScalable なサーバの実装方法。<br>
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123 <p>当時は、Java 1.3 で性能はそれほど良くはなかった<br>
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124 <p>Java 1.6 で Thread や java.nio の性能向上<br>
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125 <p>Cassandra は SEDA を採用している<br>
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126 <p></li>
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127 <li class="slide">
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128 <h1>SEDA staged event-driven architecture</h1>
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129 Multi Thread でパイプライン的に実行<br>
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130 <p><center><img src="fig/SEDA.jpg"></center><br>
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131 <p>複数のrequestが同時にたくさんに来るような場合に有効。<br>
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132 <p></li>
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133 <li class="slide">
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134 <h1>Cassandra に関する共同研究</h1>
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135 <pre> Scalability を評価する環境を構築する<br>
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136 Key Value Store の経験を積む<br>
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137 移植<br>
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138 データベース設計<br>
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139 運用<br>
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140 構成<br>
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141 優秀な学生を育てる<br>
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142 </pre>
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143 </li>
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144 <li class="slide">
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145 <h1>研究プラン</h1>
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146 <p>1Q Cassandra の評価<br>
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147 <p>2Q Cassandra に向いたメタ文書管理情報データ構造設計<br>
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148 <p>3Q 設計したデータ構造を扱う Web Service を構築する<br>
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149 <p>4Q 構築したサービスの可用性とスケーラビリティの測定を行なう<br>
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150 <p></li>
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151 <li class="slide">
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152 <h1>Scalability</h1>
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153 ユーザやデータ量が増加しても、サービスの質と信頼性を維持すること<br>
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154 <p><pre> 一見、余計なコストがかかる<br>
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155 簡単には測定できない<br>
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156 </pre>
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157 <center><img src="fig/scale.jpg"></center><br>
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158 <p>Scalability を測定する実験環境<br>
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159 <p>システム構成 (WWW Server, Memcache, Database)<br>
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160 <p></li>
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161 <li class="slide">
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162 <h1>Cassandra 実験環境</h1>
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163 琉球大学情報工学科のPCクラスタ<br>
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164 <p><pre> NEC Express Server 180 台<br>
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165 CoreDuo 2GHz, Memory 1GB, HD 160GB x 2<br>
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166 Gigabit Ether, AlaxalA switch<br>
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167 TORQUE/Maui によるjob管理 (自動実験投入)<br>
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168 90 台使えるが、落ちているものも多く 70-80台が使用可能<br>
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169 </pre>
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170 </li>
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171 <li class="slide">
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172 <h1>現在迄の成果</h1>
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173 <p>次の発表で...<br>
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174 <p>