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データベースとはなんぞや
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宏介 小畑
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データベースとはなんぞや
1.
データベースとはなんぞや 大西 佑紀 小畑 宏介
2.
ひとことで言うと… 管理されたデータの集合
3.
はじまりは アドレス帳
4.
管理 検索 分析 メリットは…
5.
効率UP!!
6.
Coffee Break 何が違う? ・情報 ・データ
7.
データベースの種類 ・階層型 ・リレーショナル ・オブジェクト指向 ・XML ・NoSQL
8.
そもそも リレーションとは … 二次元の表で表す
9.
テーブル ・行 ・列
10.
Example 社員番号 名前 部署コード
部署名 10010 田中 裕也 101 営業部 10011 山崎 達也 101 営業部 10012 佐藤 茂 102 広報部 → 行 列 ↓
11.
アーキテクチャ
12.
アーキテクチャの歴史 ・スタンドアロン ・クライアント / サーバ ・Web3層
13.
スタンドアロン AB
14.
メリット デメリット ・構築が簡単 ・セキュリティが高い ・物理的に離れた場所からアクセスできない ・複数ユーザによる同時アクセスができない
15.
アプリ アプリ アプリ クライアント / サーバ
16.
メリット デメリット ・直接DB接続するセキュリティリスク ・アプリケーションの管理コスト ・物理的に離れた場所からアクセスできる ・複数ユーザによる同時アクセスができる
17.
Web3層 Internet Webサーバ (Webサーバ層) アプリケーションサーバ (アプリケーション層) DBサーバ (DB層) サーバサイド (Web3層) Apache など Tomcat など
18.
1台しかないサーバに 障害が起きると サービスが停止する
19.
冗長化
20.
クラスタリング DBサーバ1号機 DBサーバ2号機 ストレージ
21.
レプリケーション DBサーバ DBサーバ ストレージ ストレージ 同期
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