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changeset 2:e9887bbffea4 default tip

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author Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
date Mon, 13 Sep 2010 01:45:07 +0900
parents b92265fabc51
children
files eps/corei7_read.eps eps/corei7_write.eps eps/macmini_cluster_read.eps eps/macmini_cluster_write.eps eps/macmini_read.eps eps/macmini_write.eps graffle/benchmark.graffle index.html pics/benchmark.png pics/corei7_read.png pics/corei7_write.png pics/macmini_cluster_read.png pics/macmini_cluster_write.png pics/macmini_read.png pics/macmini_write.png
diffstat 15 files changed, 894 insertions(+), 975 deletions(-) [+]
line wrap: on
line diff
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+++ b/eps/corei7_read.eps	Mon Sep 13 01:45:07 2010 +0900
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 </div>
 
 <div class="slide">
-<h1>はじめに</h1>
-<p>Cassandraという分散Key-Value Storeがある．Cassandraを用いることにより複数のノードにデータを分散させて管理することができる．本研究では，スケーラビリティの高いCMSの開発をするために，８０台のPCクラスタを用いてCassandraの検証環境を構築し，スケーラビリティの検証とMySQLとの比較を行った．<br/><br/>その結果，Cassandraの特徴や性能を発揮できる条件、他のデータベースとの違いを発見することができた．</p>
+<h1>概要</h1>
+<!--
+<div align="center">
+	<img src="./pics/benchmark.png"/>
+</div>
+-->
+<p>Cassandraという分散Key-Value Storeがある．Cassandraを用いることにより複数のサーバーでデータを分散させて管理することができる．<br/>本研究では，スケーラビリティの高いCMSの開発をするため，PCクラスタを用いた検証環境を構築し，Cassandraのスケーラビリティの検証とMySQLとの比較を行った．<br/><br/>その結果，クラスタを用いたスケーラビリティの検証方法や，Cassandraの特徴や性能を発揮できる条件、他のデータベースとの違いを発見することができた．</p>
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 <!--
@@ -82,7 +87,7 @@
 <li>FaceBookが自社のために使うデータベースとして開発し，2008年にオープンソースになる．</li>
 <li>現在，Apacheのトップレベルプロジェクトで，盛んにアップデートが行われている．</li>
 <li><span style="color:red">ConsistencyLevel</span>というパラメータがあり，データの整合性とレイテンシを調整することができる．</li>
-<li><span style="color:red">Stage based Event Driven Architecture</span>というスレッドプールを複数用意して利用する形のマルチスレッドを採用している．</li>
+<li><span style="color:red">Stage based Event Driven Architecture</span>というスレッドプールを複数用意して利用する形のマルチスレッドを採用しており特徴として，並列に負荷をかけると性能を発揮する．</li>
 </ul>
 </div>
 
@@ -114,23 +119,42 @@
 -->
 
 <div class="slide">
-<h1>Cassandraの使用例</h1>
+<h1>Cassandraを利用したアプリケーション</h1>
 <ul>
-<li>Twissandra</li>
+<li style="color: red;">Twissandra</li>
 <ul>
 	<li>TwitterのようなミニブログをCassandraで実装</li>
+	<li>Cassandra公式サイトで紹介されている</li>
 </ul>
-<li>YukiWiki on Cassandra</h1>
+<li style="color: red;">YukiWiki on Cassandra</li>
 <ul>
-	<li>YukiWikiのデータ保存部分を変更しCassandra用にしたもの．</li>
+	<li>Cassandra上で動作するCMSのサンプルを作成するためにYukiWikiを改造した．</li>
+	<li>データ構造がTIEHASHを使用しているため，容易に移植することができた．</li>
 </ul>
-<li>WordPress</li>
+<li style="color: red;">WordPress</li>
 <ul>
+	<li>YukiWikiと同じようにCassandraに移植を試みたCMS．</li>
 	<li>コード全体にSQL文が直に埋め込まれていたため移植が困難．</li>
 </ul>
 </ul>
 </div>
 
+
+<div class="slide">
+<h1>実験</h1>
+<div align="center">
+	<img width="600px" src="./pics/benchmark.png"/>
+</div>
+<small>
+<ul>
+<li>Torqueを利用して，任意台数のクラスタ（クライアント）に同時にスクリプトを実行させる</li>
+<li>スクリプトは，ある時間になると一斉に目的のサーバーに１００００回のアクセスを開始する</li>
+<li>クラスタの台数を変動させCassandraとMySQLサーバーに負荷をかける．</li>
+<li>複数台のクラスタが処理に要した時間の平均をグラフ化し比較する．</li>
+</ul>
+</small>
+</div>
+
 <div class="slide">
 <h1>実験環境</h1>
 <p>ベンチマークを取るために構築した環境</p>
@@ -172,22 +196,10 @@
 <li>Torque (クラスタリソース管理ツール)</li>
 <li>特定の１台のサーバーに負荷をかけるスクリプト</li>
 </ul>
-<small>
 <p>MySQLとの比較のため，MySQLにはCassandraと似たテーブルを定義した．</p>
 <blockquote>
-CREATE TABLE tbl_benchmark(name VARCHAR(100) UNIQUE,value VARCHAR(100),timeuuid long)
+CREATE TABLE tbl_benchmark(name VARCHAR(100) UNIQUE,<br/>value VARCHAR(100),timeuuid long)
 </blockquote>
-</small>
-</div>
-
-<div class="slide">
-<h1>実験方法</h1>
-<ul>
-<li>Torqueを利用して，任意台数のクラスタ（クライアント）に同時にスクリプトを実行させる</li>
-<li>スクリプトは，ある時間になると一斉に目的のサーバーに１００００回のアクセスを開始する</li>
-<li>クラスタの台数を変動させCassandraとMySQLサーバーに負荷をかける．</li>
-<li>複数台のクラスタが処理に要した時間の平均をグラフ化し比較する．</li>
-</ul>
 </div>
 
 <div class="slide">
@@ -198,8 +210,8 @@
 	<th>WRITE</th>
 </tr>
 <tr>
-	<td><img src="./pics/macmini_read.png"/></td>
-	<td><img src="./pics/macmini_write.png"/></td>
+	<td><img width="500px" src="./pics/macmini_read.png"/></td>
+	<td><img width="500px" src="./pics/macmini_write.png"/></td>
 </tr>
 </table>
 <small>
@@ -229,8 +241,8 @@
 	<th>WRITE</th>
 </tr>
 <tr>
-	<td><img src="./pics/corei7_read.png"/></td>
-	<td><img src="./pics/corei7_write.png"/></td>
+	<td><img width="500px" src="./pics/corei7_read.png"/></td>
+	<td><img width="500px" src="./pics/corei7_write.png"/></td>
 </tr>
 </table>
 <small>
@@ -260,8 +272,8 @@
 	<th>WRITE</th>
 </tr>
 <tr>
-	<td><img src="./pics/macmini_cluster_read.png"/></td>
-	<td><img src="./pics/macmini_cluster_write.png"/></td>
+	<td><img width="500px" src="./pics/macmini_cluster_read.png"/></td>
+	<td><img width="500px" src="./pics/macmini_cluster_write.png"/></td>
 </tr>
 </table>
 <small>
@@ -299,9 +311,9 @@
 <div class="slide">
 <h1>これからの課題</h1>
 <ul>
-<li>Cassandraの台数を増やして性能を向上させる方法を考える．</li>
+<li>Cassandraの台数を増やして性能を向上させる方法の検討．</li>
 <li>YukiWiki on Cassandraを利用した実験．</li>
-<li>Cassandraの性能を発揮できるスケーラビリティの高いCMSの開発．</li>
+<li>スケーラビリティを検証することのできるクラスタ環境を用いた，スケーラビリティの高いCMSの開発．</li>
 </ul>
 </div>
 
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