Mercurial > hg > Papers > 2014 > nobuyasu-master

annotate paper/chapter1.tex @ 13:22c48f2b344a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
chapter1.tex
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jan 2014 07:52:11 +0900
parents d42d2acf5d1d
children df59b2af84e6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4
d42d2acf5d1d Added some tex files
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
1 \chapter{既存の分散データベース}
d42d2acf5d1d Added some tex files
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
2
13
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
3 % NoSQL の説明はどこかで必要。
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
4
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
5 \section{Cassandra}
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
6
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
7
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
8 \section{Neo4j}
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
9 No4j は, グラフデータベースと呼ばれる NoSQL のデータベースである.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
10
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
11
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
12
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
13 \section{MongoDB}
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
14 MongoDB は2009年に公開された NoSQL のデータベースである.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
15 JSON フォーマットのドキュメントデータベースであり, こはスキーマが無い
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
16 リレーショナルテーブルに例えられる.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
17 スキーマが無いため, 事前にデータの定義を行う必要がない.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
18 そのためリレーショナルデータベースに比べてデータの追加・削除
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
19 が行いやすい.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
20
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
21 MongoDB は保存したデータを複数のサーバに複製をとる(replicate).
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
22 これはレプリケーション(replication)と呼ばれる.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
23 また, 1つのサーバが全てのデータを持つのでなく, ある範囲の値を別々の
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
24 サーバに分割(シャード)させて保持する.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
25 これをシャーディング(sharding)という.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
26 MongoDB はレプリケーションとシャーディングにより分散データベースとして機能する.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
27
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
28
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
29
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
30
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
31 % クエリ言語として JavaScript を採用しており, 演算子を自分作れるという利点を持つ.
22c48f2b344a chapter1.tex
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 4
diff changeset
32 % スペルミスに弱い