$ 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.磁盤瓶頸（數(shù)據(jù)持久化就是將數(shù)據(jù)存入磁盤也稱落盤）   100W/180s = 5500
b.
//將事務(wù)分離 采用集群的方式來做。
//對(duì)比MySQL插入量和MongoDB插入量
    600事務(wù)         50000條   100數(shù)量級(jí)別

讀寫分離    讀 --binlog--> 寫

數(shù)據(jù)同步 ---binlog  //binlog 是sql語(yǔ)句；這是做集群的基礎(chǔ)，錯(cuò)誤語(yǔ)句不會(huì)記錄到binlog
2.分庫(kù)分表
每一個(gè)表里的數(shù)據(jù)是一個(gè)BTree
#創(chuàng)建數(shù)據(jù)庫(kù)   create database db_name_0;
#使用庫(kù)  use db_name_0;
#創(chuàng)建表  create table tab_name_0;

# 修改配置文件 /etc/mysql/my.cnf
[mysqld]
#127.0.0.1 限制只能本地連接數(shù)據(jù)庫(kù)
#bind-address            = 127.0.0.1 
bind-address            = 0.0.0.0
#啟動(dòng)mysql服務(wù) 
sudo /etc/init.d/mysql start
#重啟
sudo /etc/init.d/mysql restart
#登錄 
mysql -u root -p 
# input password
#1.創(chuàng)建用戶
mysql> create user 'aicken'@'%' identified by '123456';
#2.為用戶授予權(quán)限
mysql> grant all privileges on *.* to 'aicken'@'%' identified by '123456' with grant option;
#刷新數(shù)據(jù)庫(kù) 此步驟不要也行，了解有這個(gè)即可
flush privileges；
#3.重啟mysql
sudo /etc/init.d/mysql restart
# 134 是master 165 是slave
###先配置master
#1.開啟logbin
sudo vim /etc/mysql/my.cnf
[mysqld]
log-bin =mysql-bin
server-id = 101
#2.重啟mysql
sudo /etc/init.d/mysql restart
# aicken -> mysql
#3.創(chuàng)建復(fù)制角色創(chuàng)建復(fù)制用戶
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狀態(tài)
mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 |      457 |              |                  |
+------------------+----------+--------------+------------------+
文件|當(dāng)前的位置
## 配置從新增server-id
[mysqld]
server-id = 102
#2.重啟mysql
sudo /etc/init.d/mysql restart
mysql -u root -p
# 改變數(shù)據(jù)庫(kù)的狀態(tài)，不是事務(wù)語(yǔ)句，不會(huì)記錄到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;
# 開始slave
mysql> start slave;
# 查看slave 狀態(tài) \G豎排
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)
# 現(xiàn)在master和slave可以同步了。