Mercurial > hg > Papers > 2022 > ikki-master

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tweak slide
author ichikitakahiro <e165713@ie.u-ryukyu.ac.jp>
date Sat, 12 Feb 2022 23:16:05 +0900
parents ab77a291294d
children 668692d92e6e
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10 <title>GearsOSの分散ファイルシステムの設計</title>
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12 <meta name="generator" content="Slide Show (S9) v4.1.0 on Ruby 2.6.8 (2021-07-07) [universal.x86_64-darwin21]">
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13 <meta name="author" content="Takahiro Ikki, Shinji Kono" >
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28 <!-- prettify -->
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32 <style>
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33 .slide {page-break-after: always;}
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34 </style>
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39 </head>
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40 <body>
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42 <div class="layout">
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43 <div id="header"></div>
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46 <img src="s6/images/logo.svg" width="200px">
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47 </div>
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51 <div class="presentation">
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53 <div class='slide cover'>
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54 <table width="90%" height="90%" border="0" align="center">
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55 <tr>
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56 <td>
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57 <div align="center">
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58 <h1><font color="#808db5">GearsOSの分散ファイルシステムの設計</font></h1>
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59 </div>
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60 </td>
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61 </tr>
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62 <tr>
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63 <td>
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64 <div align="left">
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65 Takahiro Ikki, Shinji Kono
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66 琉球大学理工学研究科情報工学専攻
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67 <hr style="color:#ffcc00;background-color:#ffcc00;text-align:left;border:none;width:100%;height:0.2em;">
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68 </div>
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69 </td>
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70 </tr>
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71 </table>
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72 </div>
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75 <div class='slide'>
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77 <!-- _S9SLIDE_ -->
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78 <h2 id="概要">概要</h2>
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79 <ul>
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80 <li>GearsOSの分散ファイルシステムの設計と実装を行った
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81 <ul>
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82 <li>ファイル構造の設計</li>
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83 <li>APIの定義</li>
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84 <li>遠隔のファイルのアクセスと保存</li>
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85 </ul>
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86 </li>
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87 <li>GearsOS同様の記述単位による構成</li>
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88 <li>ファイルは複数のstreamを持ち、通信も行う</li>
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89 </ul>
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93 </div>
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95 <div class='slide'>
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96 <!-- _S9SLIDE_ -->
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97 <h2 id="gearsos">GearsOS</h2>
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98 <ul>
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99 <li>CodeGear/DataGearという単位で記述されるOS</li>
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100 <li>OSの信頼性の保証と拡張性を目指している</li>
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101 <li>ノーマルレベルとメタレベルを分離して記述できる
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102 <ul>
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103 <li>ユーザーが実装したプログラムをメタレベルから検証する</li>
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104 <li>定理支援証明系やモデル検査が用いられる</li>
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105 </ul>
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106 </li>
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107 </ul>
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111 </div>
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112
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113 <div class='slide'>
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114 <!-- _S9SLIDE_ -->
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115 <h2 id="codegearとdatagear">CodeGearとDataGear</h2>
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116 <ul>
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117 <li>CodeGear
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118 <ul>
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119 <li>実行Codeの単位</li>
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120 <li>入力DataGearと出力DataGearを持つ</li>
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121 <li>goto文(jump命令)を使って遷移する</li>
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122 <li>実行単位は途中で割り込みされない(Atmocity)</li>
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123 </ul>
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124 </li>
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125 <li>DataGear
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126 <ul>
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127 <li>変数にあたり、構造体の型を持つ</li>
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128 <li>ノーマルレベルでは変更されない(関数型プログラミング)</li>
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129 </ul>
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130 </li>
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131 <li>C言語を拡張する形でCbC言語により実装される</li>
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132 </ul>
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134
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135
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136 </div>
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137
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138 <div class='slide'>
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139 <!-- _S9SLIDE_ -->
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140 <h2 id="codegearとdatagear-1">CodeGearとDataGear</h2>
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141 <ul>
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142 <li>InputDataGearを受け取って、CodeGearが処理し、OutputDataGearを出力する</li>
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143 <li>OutputDataGearは次のCodeGearのInputDataGearとなる</li>
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144 </ul>
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145 <div style="text-align: center;">
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146 　<img src="images/cg-dg.pdf" alt="cgdgの関係図" width="600" />
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147 </div>
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148
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149
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150
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151 </div>
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152
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153 <div class='slide'>
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154 <!-- _S9SLIDE_ -->
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155 <h2 id="gearsosにおけるファイル">GearsOSにおけるファイル</h2>
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156 <ul>
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157 <li>ファイルデータの最小単位はDataGearとなる
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158 <ul>
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159 <li>任意の構造体で構成できる</li>
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160 </ul>
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161 </li>
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162 <li>ファイルデータとなるDataGearはQueueに格納される</li>
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163 </ul>
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164 <div style="text-align: center;">
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165 　<img src="images/QueueElement.pdf" alt="Queue" width="800" />
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166 </div>
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167
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168
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169
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170 </div>
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171
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172 <div class='slide'>
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173 <!-- _S9SLIDE_ -->
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174 <h2 id="gearsosにおけるファイル-1">GearsOSにおけるファイル</h2>
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175 <ul>
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176 <li>ファイルは複数のQueueを持つ赤黒木である
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177 <ul>
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178 <li>Queueはkeyでアクセスされる</li>
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179 <li>Queueはstreamの役割を持つ</li>
31
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180 </ul>
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181 </li>
33
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182 </ul>
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183
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184 <div style="text-align: center;">
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185 　<img src="images/newGearsFile.pdf" alt="Queue" width="400" />
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186 </div>
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187
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188
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189
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190 </div>
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191
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192 <div class='slide'>
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193 <!-- _S9SLIDE_ -->
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194 <h2 id="fileapi">FileAPI</h2>
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195 <ul>
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196 <li>ファイルのAPIは三種類となる</li>
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197 <li>Put
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198 <ul>
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199 <li>Queueに対してデータを挿入する</li>
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200 </ul>
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201 </li>
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202 <li>Take
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203 <ul>
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204 <li>Queueからデータを取り出す</li>
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205 </ul>
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206 </li>
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207 <li>Peek
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208 <ul>
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209 <li>Queueからデータを”読み”だす</li>
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210 <li>Takeの先読みに相当する</li>
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211 </ul>
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212 </li>
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213 <li>APIは対象のstreamをkeyで指定する</li>
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214 </ul>
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215
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216
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217
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218 </div>
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219
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220 <div class='slide'>
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221 <!-- _S9SLIDE_ -->
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222 <h2 id="gearsosの分散ファイルシステム">GearsOSの分散ファイルシステム</h2>
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223 <ul>
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224 <li>GearsOSのファイルは通信の役割も持つ</li>
34
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225 <li>遠隔上のファイルに対応するproxyを作成して通信を行う
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226 <ul>
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227 <li>対象ファイルとproxyはsocketで接続される</li>
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228 <li>proxyの操作はLocalなファイルと相違なく行える</li>
33
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229 </ul>
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230 </li>
34
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231 <li>記録デバイスへの保存も同様な仕組みで行う</li>
33
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232 <li>将来的にAPIと通信プロセスは定理支援証明系Agdaで検証を行う</li>
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233 </ul>
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234
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235
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236
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237 </div>
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238
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239 <div class='slide'>
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240 <!-- _S9SLIDE_ -->
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241 <h2 id="gearsfsの展望">GearsFSの展望</h2>
33
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242 <ul>
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243 <li>ノードの配線を担当するTopologyManagerの実装
33
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244 <ul>
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245 <li>参加表明したノードを任意の形のTopologyへ配線する</li>
33
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246 </ul>
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247 </li>
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248 <li>複数streamにより制御を行う分散ファイル通信手法としての検証
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249 <ul>
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250 <li>Dataのみで通信を行う通信(規格があるプロトコルを用いない)</li>
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251 <li>自律分散通信の見通し確保</li>
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252 </ul>
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253 </li>
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254 <li>OSレベルなTransactionを搭載するアプリケーションとしての評価
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255 <ul>
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256 <li>GearsOSのCodeGearはTransactionとなる</li>
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257 <li>従来ではアプリケーションレベルにより実装される</li>
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258 <li>GearsOSによるOSレベルTransactionの信頼性/実用性調査</li>
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259 </ul>
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260 </li>
33
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261 </ul>
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262
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263
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264
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265 </div>
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266
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267 <div class='slide'>
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268 <!-- _S9SLIDE_ -->
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269 <h2 id="ポスターセッション">ポスターセッション</h2>
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270 <ul>
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271 <li>より詳細なGearsOSのファイル構造</li>
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272 <li>ファイルの読み出し</li>
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273 <li>proxyを用いたファイル通信の構成解説</li>
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274 <li>研究のまとめと課題</li>
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275 </ul>
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276
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277 </div>
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278
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280 </div><!-- presentation -->
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281 </body>
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282 </html>