1． 先了解一下你是否应该用MySQL集群。
减少数据中心结点压力和大数据量处理，采用把MySQL分布，一个或多个application对应一个MySQL数据库。把几个MySQL数据库公用的数据做出共享数据，例如购物车，用户对象等等，存在数据结点里面。其他不共享的数据还维持在各自分布的MySQL数据库本身中。
2． 集群MySQL中名称概念.(如上图)
1）Sql结点（SQL node--上图对应为MySQLd）:分布式数据库。包括自身数据和查询中心结点数据.
2）数据结点(Data node -- ndbd):集群共享数据(内存中).
3）管理服务器(Management Server – ndb_mgmd):集群管理SQL node,Data node.
3．配置
MySQL-max版本，当然现在MySQL集群系统windonws平台上面不被支持.
安装MySQL就不多说了，网上一大堆，简明扼要。
A:192.168.1.251 – Data node和Management Server. B:192.168.1.254 – SQL node.当然，你也可以让一个机器同时为3者。
A,B my.inf加上：
| [MySQLD] ndbcluster # run NDB engine ndb-connectstring=192.168.1.251 # location of MGM node # Options for ndbd process: [MySQL_CLUSTER] ndb-connectstring=192.168.1.251 # location of MGM node A: /var/lib/MySQL-cluster/config.ini [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=192.168.1.251 # 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=192.168.1.251 # Hostname or IP address datadir=/usr/local/MySQL/data # Directory for this data node's datafiles # SQL node options: [MySQLD] hostname=192.168.1.254 #[MySQLD] #这个相当于192.168.1.251 |
4. 启动测试
在管理服务器上面(这里是192.168.1.251):
| shell>ndb_mgmd -f /var/lib/MySQL-cluster/config.ini |
在数据结点服务器上面(依然是192.168.1.251and more):
| shell>ndbd--initial |
