本文将为大家介绍MySQL群集双机模拟方案。
硬件配置
普通PC server * 2 (最小集群环境需要4台服务器)
模拟环境
red hat linux9 for x86 (or red hat AS 2以上版本),glibc-2.2, static, gcc
MySQL版本4.1.12 binares
mysql-max binary版本目前只支持linux、max os x和solaris
本方案不涉及从源代码编译安装
主机 IP地址 用途
ndb1_mgmd_sqld 1192.168.1.100 Ndb node1+mgmd node1+sqld node1
ndb2_sqld2 192.168.1.200 Ndb node2+sqld node2
Mgmd:management server
sqld:mysql server
ndb:storaged node (share-nothing,base in memory)
安装
从http://dev.mysql.com/downloads/mysql/4.1.html下载mysql-max-4.1.12-pc-linux-gnu-i686.tar.gz到/var/tmp
Storage and SQL Node Installation
在两台主机上执行如下过程
shell>groupadd mysql
shell>useradd -g mysql mysql
shell>tar zxfv mysql-max-4.1.12-pc-linux-gnu-i686.tar.gz
shell>cp -vr mysql-max-4.1.12-pc-linux-gnu-i686 /usr/local/mysql-max-4.1.12-pc-linux-gnu-i686
shell>cd /usr/local
shell>ln -s mysql-max-4.1.12-pc-linux-gnu-i686 mysql
shell>cd mysql;scripts/mysql_install_db –user=mysql
shell>chown -R root .;chown -R mysql data;chgrp -R mysql .
shell>cp support-files/mysql.server /etc/rc.d/init.d/
shell>chmod +x /etc/rc.d/init.d/mysql.server
shell>chkconfig --add mysql.server
shell>chkconfig –level 3 mysql.server off
Management Node Installation
在主机ndb1_mgmd_sqld1上执行如下过程
shell>cd /var/tmp
shell>tar -zxvf mysql-max-4.1.12a-pc-linux-gnu-i686.tar.gz /usr/local/bin '*/bin/ndb_mgm*'
Configuration
Configuring the Storage and SQL Nodes
在两台主机上执行如下过程:
shell>vi /etc/my.cnf
[MYSQLD] # Options for mysqld process:
ndbcluster # run NDB engine
ndb-connectstring=192.168.1.100 # location of MGM node
[MYSQL_CLUSTER] # Options for ndbd process:
ndb-connectstring=192.168.1.100 # location of MGM node
Configuring the Management Node
在主机ndb1_mgmd_sqld1上执行如下过程
shell>mkdir /var/lib/mysql-cluster
shell>cd /var/lib/mysql-cluster
shell>vi config.ini
[NDBD DEFAULT] # Options affecting ndbd processes on all data nodes:
NoOfReplicas=2 # Number of replicas
DataMemory=80M # How much memory to allocate for data storage
IndexMemory=52M # 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 DEFAULT]
[NDB_MGMD] # Management process options:
hostname=192.168.1.100 # Hostname or IP address of MGM node
datadir=/var/lib/mysql-cluster # Directory for MGM node logfiles
[NDBD] # Options for data node "A":
# (one [NDBD] section per data node)
HostName=192.168.1.100 # Hostname or IP address
DataDir=/usr/local/mysql/data # Directory for this data node's datafiles
[NDBD] # Options for data node "B":
hostname=192.168.1.200 # Hostname or IP address
datadir=/usr/local/mysql/data # Directory for this data node's datafiles
[MYSQLD] # SQL node options:
hostname=192.168.1.100 # Hostname or IP address
# Directory for SQL node's datafiles
# (additional mysqld connections can be
# specified for this node for various
# purposes such as running ndb_restore)
[MYSQLD] # SQL node options:
hostname=192.168.1.200 # Hostname or IP address
# Directory for SQL node's datafiles
# (additional mysqld connections can be
# specified for this node for various
# purposes such as running ndb_restore)
第一次启动
在主机ndb1_mgmd_sqld1上执行如下过程
shell> ndb_mgmd -f /var/lib/mysql-cluster/config.ini
在两台主机上执行如下过程
shell>ndbd –initial (note:--initial选项只能在第一次启动的时候使用)
shell>/etc/init.d/mysql.server start