MySQL Cluster 是 MySQL 適合於分佈式計算環境的高實用、高冗餘版本。它採用了NDB Cluster 存儲引擎，允許在1個 Cluster 中運行多個MySQL服務器。MySQL Cluster 能夠使用多種故障切換和負載平衡選項配置NDB存儲引擎，但在 Cluster 級別上的存儲引擎上做這個最簡單。下面我們簡單介紹MySQL Cluster如何安裝與配置。
基本設定
管理(MGM)節點:192.168.0.111
MySQL服務器(SQL)節點:192.168.0.110
數據(NDBD)節點”A”:192.168.0.112
數據(NDBD)節點”B”:192.168.0.113 一、mysql集羣安裝mysql的集羣安裝可以有三種方式，一是直接下載二進制使用，二是使用rpm安裝，三是源碼編譯。我們這裏使用第一種安裝。
1、每個節點做相同的操作 cd /tmp wget http://cdn.mysql.com/Downloads/MySQL-Cluster-7.2/mysql-cluster-gpl-7.2.8-linux2.6-i686.tar.gz tar xzf mysql-cluster-gpl-7.2.8-linux2.6-i686.tar.gz mv mysql-cluster-gpl-7.2.8-linux2.6-i686 /usr/local/mysql
注意：這裏下載的是32位的二進制包，如果你的系統是64位，需要下載64位的包。
2、存儲節點和SQL節點安裝 groupadd mysql useradd -g mysql mysql /usr/local/mysql/scripts/mysql_install_db --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --user=mysql chown -R root /usr/local/mysql chown -R mysql /usr/local/mysql/data chgrp -R mysql /usr/local/mysql cp /usr/local/mysql/support-files/my-medium.cnf /etc/my.cnf
二、節點配置1、配置存儲節點和SQL節點 vi /etc/my.cnf 類似於： # Options for mysqld process: [MYSQLD] ndbcluster # run NDB engine ndb-connectstring=198.168.0.111 # location of MGM node
# Options for ndbd process: [MYSQL_CLUSTER] ndb-connectstring=198.168.0.111 # location of MGM node
2、配置管理節點 mkdir /var/lib/mysql-cluster cd /var/lib/mysql-cluster vi config.ini
config.ini文件應類似於：
# Options affecting ndbd processes on all data nodes: [NDBD DEFAULT] NoOfReplicas=2 # Number of replicas DataMemory=80M # How much memory to allocate for data storage IndexMemory=18M # How much memory to allocate for index storage # For DataMemory and IndexMemory, we have used the # default values. Since the "world" database takes up # only about 500KB, this should be more than enough for # this example Cluster setup.
# TCP/IP options: [TCP DEFAULT] portnumber=2202 # This the default; however, you can use any # port that is free for all the hosts in cluster # Note: It is recommended beginning with MySQL 5.0 that # you do not specify the portnumber at all and simply allow # the default value to be used instead
# Management process options: [NDB_MGMD] hostname=198.168.0.111 # Hostname or IP address of MGM node datadir=/var/lib/mysql-cluster # Directory for MGM node logfiles
# Options for data node "A": [NDBD] # (one [NDBD] section per data node) hostname=198.168.0.112 # Hostname or IP address datadir=/usr/local/mysql/data # Directory for this data node's datafiles
# Options for data node "B": [NDBD] hostname=198.168.0.113 # Hostname or IP address datadir=/usr/local/mysql/data # Directory for this data node's datafiles
# SQL node options: [MYSQLD] hostname=198.168.0.110 # Hostname or IP address # (additional mysqld connections can be # specified for this node for various # purposes such as running ndb_restore)
三、首次啓動節點1、啓動管理節點
2、啓動數據節點
首次啓動需要–initial參數初始化，下一次啓動就不需要了。
3、啓動SQL節點
4、檢查狀態
如果一切正常，執行命令 /usr/local/mysql/bin/ndb_mgm -e show應該會輸出類似信息： [root@localhost mysql-cluster]# /usr/local/mysql/bin/ndb_mgm -e show
Connected to Management Server at: localhost:1186
Cluster Configuration
———————
[ndbd(NDB)] 2 node(s)
id=2 @192.168.0.112 (mysql-5.5.27 ndb-7.2.8, Nodegroup: 0, Master)
id=3 @192.168.0.113 (mysql-5.5.27 ndb-7.2.8, Nodegroup: 0) [ndb_mgmd(MGM)] 1 node(s)
id=1 @192.168.0.111 (mysql-5.5.27 ndb-7.2.8) [mysqld(API)] 1 node(s)
id=4 @192.168.0.110 (mysql-5.5.27 ndb-7.2.8) 四、測試服務是否正常在SQL節點上執行如下數據庫操作： /usr/local/mysql/bin/mysql -uroot -p mysql> create database clusterdb;use clusterdb; mysql> create table simples (id int not null primary key) engine=ndb; mysql> insert into simples values (1),(2),(3),(4); mysql> select * from simples;
如果出現：
+—-+
| id |
+—-+
| 1 |
| 2 |
| 4 |
| 3 |
+—-+
則表示工作正常。 五、安全關閉和重啓1、關閉mysql集羣，可在管理節點在執行如下命令：
2、重啓管理節點
3、重啓數據節點 | 
