mysql主主搭建配置：
這裏我們的主主架構爲192.168.1.12 192.168.1.13
在192.168.1.12服務器上執行以下：
vim /etc/my.cnf
[mysqld]
server-id = 11
log-bin = mysql-bin
auto-increment-increment = 2
auto-increment-offset = 1
relay-log=mysql-relay
relay-log-index=mysql-relay.index
mysql>grant replication client,replication slave on *.* to [email protected] identified by '135246';
mysql>flush privileges;
在192.168.1.13服務器上執行以下：
vim /etc/my.cnf
[mysqld]
server-id = 12
log-bin = mysql-bin
auto-increment-increment = 2
auto-increment-offset = 2
relay-log=mysql-relay
relay-log-index=mysql-relay.index
mysql>grant replication client,replication slave on *.* to [email protected] identified by '135246';
mysql>flush privileges;
如果此時兩臺服務器均爲新建立，且無其它寫入操作，各服務器只需記錄當前自己二進制日誌文件及事件位置，以之作爲另外的服務器複製起始位置即可
192.168.1.12上
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000004 | 360 | | |
+------------------+----------+--------------
192.168.1.13
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000005 | 107 | | |
+------------------+----------+--------------+------------------+
各服務器接下來指定對另一臺服務器爲自己的主服務器即可：
192.168.1.12
mysql>change master to \
master_host='192.168.1.13',
master_user='mysql0',
master_password='135246',
master_log_file='mysql-bin.000005',
master_log_pos=107;
192.168.1.13
mysql>change master to \
master_host='192.168.1.12',
master_user='mysql0',
master_password='135246',
master_log_file='mysql-bin.000004',
master_log_pos=360;
然後mysql> start slave;
到此主主機構已經完成！
mysql>show tables；
mysql> create table user( id int auto_increment, name varchar(20), primary key (id));
Query OK, 0 rows affected (0.03 sec)
mysql> insert into user(name) values ('zhangsan'), ('lisi');
Query OK, 2 rows affected (0.03 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> insert into user(name) values ('zhang'), ('li');
Query OK, 2 rows affected (0.03 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> select id from user;
+----+
| id |
+----+
| 1 |
| 3 |
| 5 |
| 7 |
+----+
mysql> show variables like '%auto_incr%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| auto_increment_increment | 2 |
| auto_increment_offset | 1 |
+--------------------------+-------+
2 rows in set (0.00 sec)
修改AUTO_INCREMENT_OFFSET 值，改變自增器起始值
mysql > set auto_increment_offset=60;
Query OK, 0 rows affected (0.00 sec)
是否啓用了日誌
mysql>show variables like 'log_%';
怎樣知道當前的日誌
mysql> show master status;
顯示二進制日誌數目
mysql> show master logs;
看二進制日誌文件用mysqlbinlog
shell>mysqlbinlog mail-bin.000001
或者shell>mysqlbinlog mail-bin.000001 | tail
在配置文件中指定log的輸出位置.
Linux 的配置文件爲 my.cnf ，一般在 /etc 下。
在linux下：
Sql代碼
# 在[mysqld] 中輸入
#log
log-error=/usr/local/mysql/log/error.log
log=/usr/local/mysql/log/mysql.log
long_query_time=2
log-slow-queries= /usr/local/mysql/log/slowquery.log
# 在[mysqld] 中輸入 #log
log-error=/usr/local/mysql/log/error.log
log=/usr/local/mysql/log/mysql.log
long_query_time=2
log-slow-queries= /usr/local/mysql/log/slowquery.log
注：
在配置中會遇到的問題：
[root@www ~]# service mysqld restart
MySQL server PID file could not be found! [FAILED]
這裏由於數據是空的我採用的解決方案是：
cd /usr/local/mysql
[root@www mysql]# ./scripts/mysql_install_db --user=mysql --datadir=/mydata/data
Installing MySQL system tables...
120718 15:17:51 [Warning] You need to use --log-bin to make --binlog-format work.
OK
Filling help tables...
120718 15:17:52 [Warning] You need to use --log-bin to make --binlog-format work.
OK
當然由於此mysql以前做過mysql的從服務器所以出現warning
這裏的解決方案是：
vim /etc/my.cnf
把原來註釋掉的二進制日誌打開即可
UTF-8是UNICODE的一種變長字符編碼又稱萬國碼，由Ken Thompson於1992年創建。現在已經標準化爲RFC 3629。UTF-8用1到6個字節編碼UNICODE字符。用在網頁上可以同一頁面顯示中文簡體繁體及其它語言(如日文，韓文)
這裏我們將mysql的字符集修改爲utf8
修改my.cnf配置文件在【mysqld】下加
character-set-server=utf8