数据库|mysql教程
数据库,用户
数据库-mysql教程
Mysql集群
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1. 先了解一下你是否应该用MySQL集群。
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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。
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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 nodes datafiles # SQL node options: [MySQLD] hostname=192.168.1.254 #[MySQLD] #这个相当于192.168.1.251
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