mysql集群拾掇版

mysql集群拾掇版

mysql集群整理版


mysql集群架构主要分为:数据节点(ndbd),管理节点(mgmd),服务节点(mysqld)

附件是mysql集群整体架构图

1. 下载:http://dev.mysql.com/downloads/mysql/5.0.html#linux 可以从这里下载 mysql-5.0.45-linux-i686.tar.gz

此包里已经包含了mysql-max包(mysql集群需要安装mysql-max包)。

2. 解压:

tar -zxvf apache-tomcat-5.5.25.tar.gz

  

下载的这个.tar.gz是编译后的文件,只需要解压即可。

3. 配置

比如解压后的文件都放在:/home/mahaibo/mysql-5.0.45-linux-i686目录下。

数据节点(ndbd),管理节点(mgmd),服务节点(mysqld) 三个启动顺序是

mgmd —> ndbd —> mysqld

可以在同一台电脑上做个简单的配置和测试。
以在同一台电脑上不同端口为例。实际中肯定是需要分布在不同的服务器上的。

A: 配置mgmd,并启动

在/home/mahaibo/mysql-5.0.45-linux-i686建立一个mgmd.cnf和mgmd的数据目录mgmddata  ,编辑mgmd.cnf文件:

 

# Options affecting ndbd processes on all data nodes:
[NDBD DEFAULT]    
NoOfReplicas=1    # 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=127.0.0.1           # Hostname or IP address of MGM node ,mgmd's hostname
datadir=/home/mahaibo/mysql-5.0.45-linux-i686/mgmddata  # Directory for MGM node logfiles
PortNumber=2203            #default value: 1186

# Options for data node "A":
[NDBD]                          
                                # (one [NDBD] section per data node)
hostname=127.0.0.1           # Hostname or IP address ,allow to access
datadir=/home/mahaibo/mysql-5.0.45-linux-i686/mgmddata   # Directory for this data node's datafiles

# Options for data node "B":
[NDBD]                          
hostname=127.0.0.1           # Hostname or IP address
datadir=/home/mahaibo/mysql-5.0.45-linux-i686/mgmddata   # Directory for this data node's datafiles

[MYSQLD]                        
hostname=127.0.0.1           # Hostname or IP address
                                # (additional mysqld connections can be
                                # specified for this node for various
                                # purposes such as running ndb_restore)

可以看到配置了2个数据节点ndbd,也就是说改管理节点可以管理小于或等于2个数据节点。管理节点mgmd的端口为2203。

启动mgmd服务:

bin/ndb_mgmd -f mgmd.cnf 

启动后,登录mgmd的客户端mgm可以查看具体信息:

bin/ndb_mgm 127.0.0.1 2203 //因为mgmd服务用的端口是2203,所以要通过该端口链接
[mahaibo@client mysql-5.0.45-linux-i686]$ bin/ndb_mgm 127.0.0.1 2203
-- NDB Cluster -- Management Client --
ndb_mgm> show
Connected to Management Server at: 127.0.0.1:2203
Cluster Configuration
---------------------
[ndbd(NDB)]     2 node(s)
id=2 (not connected, accepting connect from 127.0.0.1)
id=3 (not connected, accepting connect from 127.0.0.1)

[ndb_mgmd(MGM)] 1 node(s)
id=1    @127.0.0.1  (Version: 5.0.45)

[mysqld(API)]   1 node(s)
id=4 (not connected, accepting connect from 127.0.0.1)

ndb_mgm> 

可以看到ndbd和mysqld都是
not connected状态,因为这2个服务都还没有启动。


B: 启动数据节点(ndbd)

以启动2个数据节点为例。

mysql集群拾掇版

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