$ mysql -V #查看mysql版本
mysql Ver 14.14 Distrib 5.5.62, for debian-linux-gnu (x86_64) using readline 6.3***
1.MySQL搭建集群的原因？
a.磁盘瓶颈（数据持久化就是将数据存入磁盘也称落盘） 100W/180s = 5500
b.
//将事务分离 采用集群的方式来做。
//对比MySQL插入量和MongoDB插入量
600事务 50000条 100数量级别
读写分离 读 --binlog--> 写
数据同步 ---binlog //binlog 是sql语句；这是做集群的基础，错误语句不会记录到binlog
2.分库分表
每一个表里的数据是一个BTree
#创建数据库 create database db_name_0;
#使用库 use db_name_0;
#创建表 create table tab_name_0;
# 修改配置文件 /etc/mysql/my.cnf
[mysqld]
#127.0.0.1 限制只能本地连接数据库
#bind-address = 127.0.0.1
bind-address = 0.0.0.0
#启动mysql服务
sudo /etc/init.d/mysql start
#重启
sudo /etc/init.d/mysql restart
#登录
mysql -u root -p
# input password
#1.创建用户
mysql> create user 'aicken'@'%' identified by '123456';
#2.为用户授予权限
mysql> grant all privileges on *.* to 'aicken'@'%' identified by '123456' with grant option;
#刷新数据库 此步骤不要也行，了解有这个即可
flush privileges；
#3.重启mysql
sudo /etc/init.d/mysql restart
# 134 是master 165 是slave
###先配置master
#1.开启logbin
sudo vim /etc/mysql/my.cnf
[mysqld]
log-bin =mysql-bin
server-id = 101
#2.重启mysql
sudo /etc/init.d/mysql restart
# aicken -> mysql
#3.创建复制角色创建复制用户
mysql> create user 'replication'@'%' identified by '123456';
mysql> grant all privileges on *.* to 'replication'@'%' identified by '123456' with grant option;
mysql> flush privileges;
#4.查看master状态
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 | 457 | | |
+------------------+----------+--------------+------------------+
文件|当前的位置
## 配置从新增server-id
[mysqld]
server-id = 102
#2.重启mysql
sudo /etc/init.d/mysql restart
mysql -u root -p
# 改变数据库的状态，不是事务语句，不会记录到binlog文件
mysql> change master to master_host='192.168.215.134',master_port=3306, master_user='replication', master_password='123456',master_log_file='mysql-bin.000001', master_log_pos=457;
# 开始slave
mysql> start slave;
# 查看slave 状态 \G竖排
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.215.134
Master_User: replication
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 457
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 457
Relay_Log_Space: 410
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 101
1 row in set (0.00 sec)
# 现在master和slave可以同步了。