前言：
有一个mysql学生说他们因为binlog产生太大了，需要把日志路径放到另外的磁盘上面去，问我有啥时机的操作方案，share弄了一个mysql的binlog的日志路径切换的例子给他。正好今天有空，就拿mysql5.6.12来做个实例，给大家演示一下。
1，查看binlog地址
[root@mysql5612 ~]# more /usr/local/mysql/my.cnf |grep log-binlog-bin =/home/data/mysql/binlog/mysql-bin.log[root@mysql5612 ~]# 2，验证binlog的正常使用
[root@mysql5612 binlog]# pwd/home/data/mysql/binlog[root@mysql5612 binlog]# mysqlWarning: Using a password on the command line interface can be insecure.Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 390217Server version: 5.6.12-log Source distributionCopyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> create table z2 select 2 as a;ERROR 1046 (3D000): No database selectedmysql> create table test.z2 select 2 as a;Query OK, 1 row affected (0.04 sec)Records: 1 Duplicates: 0 Warnings: 0mysql> exitBye[root@mysql5612 binlog]# ll总用量 6240204-rw-rw----. 1 mysql mysql 1073742187 6月 8 2015 mysql-bin.000048-rw-rw----. 1 mysql mysql 1073741968 6月 8 2015 mysql-bin.000049-rw-rw----. 1 mysql mysql 1073742063 6月 8 2015 mysql-bin.000050-rw-rw----. 1 mysql mysql 1073741957 6月 8 2015 mysql-bin.000051-rw-rw----. 1 mysql mysql 1073742142 6月 8 2015 mysql-bin.000052-rw-rw----. 1 mysql mysql 1021194604 12月 10 20:44 mysql-bin.000053-rw-rw----. 1 mysql mysql 615 6月 8 2015 mysql-bin.index[root@mysql5612 binlog]# 看到binlog日志更新了，在20:44时间处，binlog日志mysql-bin.000053有更新记录。然后冲洗mysql服务，看看binlog是否会重新生成：
[root@mysql5612 binlog]# service mysqld56 restartShutting down MySQL................. [确定]Starting MySQL..... [确定][root@mysql5612 binlog]# [root@mysql5612 binlog]# ll总用量 997276-rw-rw----. 1 mysql mysql 1021194627 12月 10 20:46 mysql-bin.000053-rw-rw----. 1 mysql mysql 399 12月 10 20:47 mysql-bin.000054-rw-rw----. 1 mysql mysql 82 12月 10 20:46 mysql-bin.index[root@mysql5612 binlog]# 果然，有新的mysql-bin.000054日志生成了。
原csdn的blog地址：blog.csdn.net/mchdba/article/details/50254903，未经过原作者黄杉(mchdba)允许，不得转载
3，去修改binlog日志路径
建立新的binlog日志路径：
[root@mysql5612 binlog]# mkdir -p /home/data/mysql/binlog_new[root@mysql5612 binlog]# [root@mysql5612 binlog]# chown -R mysql.mysql /home/data/mysql/binlog_new[root@mysql5612 binlog]# 然后修改my.cnf，设置新的log-bin路径：
[root@mysql5612 binlog]# vim /usr/local/mysql/my.cnflog-bin =/home/data/mysql/binlog_new/mysql-bin查看配置文件的binlog路径：
[root@mysql5612 mysql]# more /usr/local/mysql/my.cnf |grep log-binlog-bin =/home/data/mysql/binlog_new/mysql-bin[root@mysql5612 mysql]# 4，重启mysql服务
[root@mysql5612 mysql]# service mysqld56 restartShutting down MySQL.. [确定]Starting MySQL..... [确定][root@mysql5612 mysql]# 5，验证新的binlog
查看生成的日志，有新的如下所示：
[root@mysql5612 mysql]# cd /home/data/mysql/binlog_new/[root@mysql5612 binlog_new]# ll总用量 12-rw-rw----. 1 mysql mysql 143 12月 10 21:09 mysql-bin.000001-rw-rw----. 1 mysql mysql 399 12月 10 21:10 mysql-bin.000002-rw-rw----. 1 mysql mysql 90 12月 10 21:10 mysql-bin.index[root@mysql5612 binlog_new]# 建立新表，录入数据：
[root@mysql5612 binlog_new]# mysqlWarning: Using a password on the command line interface can be insecure.Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 2Server version: 5.6.12-log Source distributionCopyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> use test;Reading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedmysql> create table z3 select 3 as a;Query OK, 1 row affected (0.01 sec)Records: 1 Duplicates: 0 Warnings: 0mysql> insert into z3 select 4;Query OK, 1 row affected (0.00 sec)Records: 1 Duplicates: 0 Warnings: 0mysql> insert into z3 select 5;Query OK, 1 row affected (0.00 sec)Records: 1 Duplicates: 0 Warnings: 0mysql> select * from z4;ERROR 1146 (42S02): Table 'test.z4' doesn't existmysql> select * from z3;+---+| a |+---+| 3 || 4 || 5 |+---+3 rows in set (0.00 sec)mysql> 再去查看binlog，mysql-bin.000002从399增大到1085，表示有新的二进制日志产生了：
[root@mysql5612 binlog_new]# ll总用量 12-rw-rw----. 1 mysql mysql 143 12月 10 21:09 mysql-bin.000001-rw-rw----. 1 mysql mysql 1085 12月 10 21:11 mysql-bin.000002-rw-rw----. 1 mysql mysql 90 12月 10 21:10 mysql-bin.index[root@mysql5612 binlog_new]# 再使用mysqlbinlog工具去看下产生的新日志是否刚在建立的z3表记录，看到有所有关于test库建立的z3表的操作记录，如下所示：
[root@mysql5612 binlog_new]# /usr/local/mysql/bin/mysqlbinlog --base64-output=DECODE-ROWS -v mysql-bin.000002;;;DELIMITER ;# at 4#151210 21:10:05 server id 72 end_log_pos 120 CRC32 0xa723f142 Start: binlog v 4, server v 5.6.12-log created 151210 21:10:05 at startup# Warning: this binlog is either in use or was not closed properly.ROLLBACK;# at 120#151210 21:10:07 server id 72 end_log_pos 206 CRC32 0x447f5733 Query thread_id=1 exec_time=0 error_code=0SET TIMESTAMP=1449753007;SET @@session.pseudo_thread_id=1;SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1;SET @@session.sql_mode=1075838976;SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1;;SET @@session.character_set_client=45,@@session.collation_connection=45,@@session.collation_server=45;SET @@session.time_zone='SYSTEM';SET @@session.lc_time_names=0;SET @@session.collation_database=DEFAULT;BEGIN;# at 206#151210 21:10:07 server id 72 end_log_pos 274 CRC32 0xde0b7250 Table_map: `access_log`.`access_log` mapped to number 70# at 274#151210 21:10:07 server id 72 end_log_pos 368 CRC32 0xa03a9659 Write_rows: table id 70 flags: STMT_END_F### INSERT INTO `access_log`.`access_log`### SET### @1=10534### @2=1### @3=1449753007### @4='park_user@192.168.121.243'### @5='park_user@192.168.%'# at 368#151210 21:10:07 server id 72 end_log_pos 399 CRC32 0x3ccf3c72 Xid = 3COMMIT;# at 399#151210 21:10:58 server id 72 end_log_pos 471 CRC32 0xef9ce950 Query thread_id=2 exec_time=0 error_code=0SET TIMESTAMP=1449753058;BEGIN;# at 471#151210 21:10:58 server id 72 end_log_pos 593 CRC32 0x92e79f36 Query thread_id=2 exec_time=0 error_code=0use `test`;SET TIMESTAMP=1449753058;CREATE TABLE `z3` ( `a` int(1) NOT NULL DEFAULT '0');# at 593#151210 21:10:58 server id 72 end_log_pos 638 CRC32 0x65f13b58 Table_map: `test`.`z3` mapped to number 107# at 638#151210 21:10:58 server id 72 end_log_pos 678 CRC32 0xaa7fb7e1 Write_rows: table id 107 flags: STMT_END_F### INSERT INTO `test`.`z3`### SET### @1=3# at 678#151210 21:10:58 server id 72 end_log_pos 709 CRC32 0x218a319c Xid = 60COMMIT;# at 709#151210 21:11:04 server id 72 end_log_pos 781 CRC32 0x9662b95e Query thread_id=2 exec_time=0 error_code=0SET TIMESTAMP=1449753064;BEGIN;# at 781#151210 21:11:04 server id 72 end_log_pos 826 CRC32 0x46f32822 Table_map: `test`.`z3` mapped to number 107# at 826#151210 21:11:04 server id 72 end_log_pos 866 CRC32 0xafb27f1e Write_rows: table id 107 flags: STMT_END_F### INSERT INTO `test`.`z3`### SET### @1=4# at 866#151210 21:11:04 server id 72 end_log_pos 897 CRC32 0x351c7718 Xid = 63COMMIT;# at 897#151210 21:11:10 server id 72 end_log_pos 969 CRC32 0x76931e05 Query thread_id=2 exec_time=0 error_code=0SET TIMESTAMP=1449753070;BEGIN;# at 969#151210 21:11:10 server id 72 end_log_pos 1014 CRC32 0xe7e8947b Table_map: `test`.`z3` mapped to number 107# at 1014#151210 21:11:10 server id 72 end_log_pos 1054 CRC32 0xbdafa096 Write_rows: table id 107 flags: STMT_END_F### INSERT INTO `test`.`z3`### SET### @1=5# at 1054#151210 21:11:10 server id 72 end_log_pos 1085 CRC32 0x831695c0 Xid = 64COMMIT;DELIMITER ;# End of log fileROLLBACK ;;;[root@mysql5612 binlog_new]# 这表明我们的binlog路径切换操作成功完成了。