MySQL群集需要有一组计算机,每台计算机的角色可能是不一样的。MySQL群集中有三种节点:管理节点、数据节点和SQL节点。群集中的某
Mysql群集(Cluster)简介
数据节点用于存储数据。
下图中画出了三种群集节点及应用程序间的关系:
一、配置环境:
MySQL:mysql-cluster-gpl-7.2.12-linux2.6-x86_64.tar.gz
节点配置情况:
hostname IP地址应用服务
DB1 172.16.10.160 MGM
DB2 172.16.10.161 NDBD1,MYSQLD
DB3 172.16.10.162 NDBD2, MYSQLD
DB4 172.16.10.254 MYSQLD
二、管理节点:
(一)安装管理节点MGM
#groupadd mysql
#useradd mysql -g mysql
#mv mysql-cluster-gpl-7.0.8a-linux-i686-glibc23.tar.gz/usr/local/
#cd /usr/local/
#tar zxvfmysql-cluster-gpl-7.0.8a-linux-i686-glibc23.tar.gz
#rm -fmysql-cluster-gpl-7.0.8a-linux-i686-glibc23.tar.gz
#mv mysql-cluster-gpl-7.0.8a-linux-i686-glibc23mysql
#chown -R mysql:mysql mysql
(二)配置装管理节点MGM
#mkdir/var/lib/mysql-cluster
#cd /var/lib/mysql-cluster
[NDBD DEFAULT]
NoOfReplicas=2 #副本数量,建议使用默认的2
DataMemory=600M #每个数据节点中给数据分配的内存
IndexMemory=100M #每个数据节点中给索引分配的内存
BackupMemory: 20M
Nodeid= 1
[NDBD]
HostName=172.16.10.162
DataDir=/usr/local/mysql/data
HostName=172.16.10.161
[mysqld]
HostName=172.16.10.162
[mysqld]
HostName=172.16.10.254
[mysqld] #建议保留一个SQL节点配置口
(三)管理节点启动相关服务及测试:
#/usr/local/mysql/bin/ndb_mgmd -f /var/lib/mysql-cluster/config.ini
#netstat -lntpu
tcp 0 0 0.0.0.0:1186 0.0.0.0:* LISTEN 22907/ndb_mgmd
看到1186端口开放了说明启动是正常的.
ndb_mgmd -f /var/lib/mysql-cluster/config.ini --initial
#/usr/local/mysql/bin/ndb_mgm -e show
关闭管理节点,如下:
#/usr/local/mysql/bin/ndb_mgm -e shutdown
三、数据节点和SQL节点:
#groupadd mysql
#useradd mysql -g mysql
#mvmysql-cluster-gpl-7.0.8a-linux-i686-glibc23.tar.gz /usr/local/
#cd /usr/local/
#tar zxvfmysql-cluster-gpl-7.0.8a-linux-i686-glibc23.tar.gz
#rm -fmysql-cluster-gpl-7.0.8a-linux-i686-glibc23.tar.gz
#mv mysql-cluster-gpl-7.0.8a-linux-i686-glibc23mysql
#chown -R mysql:mysql mysql
#cd mysql
#scripts/mysql_install_db --user=mysql
#cp support-files/my-medium.cnf /etc/my.cnf
#cp support-files/mysql.server /etc/init.d/mysqld
(二)配置数据节点和SQL节点
[mysqld]
(三)数据节点和SQL节点服务:
启动数据节点
#/usr/local/mysql/bin/ndbd –initial #/usr/local/mysql/bin/ndbd
启动SQL节点
Service mysqld start

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