MySQL服务器集群介绍与配置详解_MySQL

Mysql集群

　　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，一个或本文来源gao@!dai!ma.com搞$$代^@码!网!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：

<ol class="dp-sql"><li class="alt">MySQLD]                           </li><li>ndbcluster                     # run NDB engine    </li><li class="alt">ndb-connectstring=192.168.1.251 # location of MGM node       </li><li># Options for ndbd process:  [MySQL_CLUSTER]                    </li><li class="alt">ndb-connectstring=192.168.1.251 # location of MGM node       </li><li>A: /var/lib/MySQL-cluster/config.ini  [NDBD DEFAULT]       </li><li class="alt">NoOfReplicas=1     </li><li># Number of replicas  DataMemory=80M     </li><li class="alt"># How much memory to allocate for data storage  IndexMemory=18M    </li><li># How much memory to allocate for index storage                     </li><li class="alt"># For DataMemory and IndexMemory, we have used the                    </li><li># default values. Since the "world" database takes up                     </li><li class="alt"># only about 500KB, this should be more than enough for                     </li><li># this example Cluster setup.  # TCP/IP options:  [TCP DEFAULT]        </li><li class="alt">portnumber=2202  # This the default; however, you can use any                     </li><li># port that is free for all the hosts in cluster                     </li><li class="alt"># Note: It is recommended beginning with MySQL 5.0 that                    </li><li># you do not specify the portnumber at all and simply allow                     </li><li class="alt"># the default value to be used instead  # Management process options:  [NDB_MGMD]                       hostname=192.168.1.251            </li><li># Hostname or IP address of MGM node  datadir=/var/lib/MySQL-cluster # Directory for MGM node logfiles  # Options for data node "A":  [NDBD]                             </li><li class="alt"># (one [NDBD] section per data node)  hostname=192.168.1.251           </li><li> # Hostname or IP address  datadir=/usr/local/MySQL/data    </li><li class="alt"># Directory for this data node's datafiles   </li><li># SQL node options:  [MySQLD]  hostname=192.168.1.254    </li><li class="alt">#[MySQLD] #这个相当于192.168.1.251  </li></ol>

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