二.二进制日志
二进制日志也通常被称为binlog,它记当着所有的DDL和DML，但不包括数据查询语句。
1.配置信息
--log-bin=[file-name]用来指定错误日志存放的位置。
如果没有指定[file-name]，默认为主机名后面跟-bin做为文件名，默认存放在DATADIR目录中。
也可以将log-bin配置到my.cnf文件中，这样就省去了每次在启动mysqld时都手工指定--log-bin.例如:
# The MySQL server
[mysqld]
......
log-bin = /var/lib/mysql/log-bin
......
2.查看blnlog
由于binlog以是binary方式存取，不能直接查看，需要用mysql提供的mysqlbinlog工具查看。
3.删除binlog
(1).用reset master命令删除所有日志，新日志重新从000001开始编号
(2).用purge master logs to 'mysq-bin.******' 命令可以删除指定编号前的所有日志
(3).用purge master logs to before 'YYYY-MM-DD HH24:MI:SS'命令可以删除'YYYY-MM-DD HH24:MI:SS'之前的产生的所有日志
(4).可以在my.cnf中指定--expire_logs_days=#，此参数设置了binlog日志的过期天数
4.测试案例
[mysql@test2]$ mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 18 to server version: 5.0.26-standard-log
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> use test;
Database changed
mysql> select * from pet;
+----------+--------+---------+------+------------+------------+
| name | owner | species | sex | birth | death |
+----------+--------+---------+------+------------+------------+
| Fluffy | Harold | cat | f | 1993-02-04 | NULL |
| Claws | Gwen | cat | m | 1994-03-17 | NULL |
| Buffy | Harold | dog | f | 1989-05-13 | NULL |
| Fang | Benny | dog | m | 1990-08-27 | NULL |
| Bowser | Diane | dog | m | 1979-08-31 | 1995-07-29 |
| Chirpy | Gwen | bird | f | 1998-09-11 | NULL |
| Whistler | Gwen | bird | NULL | 1997-12-09 | NULL |
| Slim | Benny | snake | m | 1996-04-29 | NULL |
+----------+--------+---------+------+------------+------------+
8 rows in set (0.06 sec)
mysql> insert into pet values('hunter','yxyup','cat','f','1996-04-29',null);
Query OK, 1 row affected (0.03 sec)
mysql> select * from pet;
+----------+--------+---------+------+------------+------------+
| name | owner | species | sex | birth | death |
+----------+--------+---------+------+------------+------------+
| Fluffy | Harold | cat | f | 1993-02-04 | NULL |
| Claws | Gwen | cat | m | 1994-03-17 | NULL |
| Buffy | Harold | dog | f | 1989-05-13 | NULL |
| Fang | Benny | dog | m | 1990-08-27 | NULL |
| Bowser | Diane | dog | m | 1979-08-31 | 1995-07-29 |
| Chirpy | Gwen | bird | f | 1998-09-11 | NULL |
| Whistler | Gwen | bird | NULL | 1997-12-09 | NULL |
| Slim | Benny | snake | m | 1996-04-29 | NULL |
| hunter | yxyup | cat | f | 1996-04-29 | NULL |
+----------+--------+---------+------+------------+------------+
9 rows in set (0.00 sec)
