mysql共享表空间转独立表空间
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使用innodb_export_import.py脚本：
https://github.com/thecpaneladmin/innodb-tools
安装mysql-python模块:
shell > yum install MySQL-python -y
步骤一：修改my.cnf文件
增加innodb_force_recovery = 4参数，重启mysql，阻塞所有读写操作，
步骤二：执行脚本导出innodb表的数据（脚本没有用户和密码选项，需要写在my.cnf文件中，即user=xxx和password=xxx参数）：
shell > python innodb_export_import.py --export --dir=/data/mysql.bak --config=/usr/local/services/mysql/my.cnf
备份过程：
Getting a list of databases...
Checking for InnoDB tables...
Database performance_schema... No InnoDB tables
Database sbtest... Detected 1 InnoDB tables
Database test... No InnoDB tables
Database xiaoboluo... Detected 2 InnoDB tables
Dumping tables...
Dumped table xiaoboluo.t1 (1 / 3)
Dumped table xiaoboluo.t2 (2 / 3)
Dumped table sbtest.sbtest (3 / 3)
SUMMARY:
Tables Exported: 3
Tables Failed: 0
Databases Total: 2
Tables Total: 3
Log file: /data/mysql.bak/201510140221/innodb_export.log
Tables were dumped to: /data/mysql.bak/201510140221
此时可以查看export日志文件：
shell > cat /data/mysql.bak/201510140221/innodb_export.log
查看备份文件：
shell > ll /data/mysql.bak/201510140221/
总用量 12
-rw-r--r-- 1 root root 211 10月 14 02:21 innodb_export.log
drwxr-xr-x 2 root root 4096 10月 14 02:21 sbtest
drwxr-xr-x 2 root root 4096 10月 14 02:21 xiaoboluo
步骤三：停止mysql，在my.cnf中添加独立表空间参数：innodb_file_per_table=1，删掉my.cnf中的innodb_force_recovery=4参数，备份原来的数据目录,并删掉ibdata1和ib_logfile*文件，启动mysql
shell > cp -ar /data/mysql/data /data/mysql/data.bak
shell > rm -rf /data/mysql/data/ibdata1 /data/mysql/data/ib_logfile*
shell > service mysqld start
步骤四：并执行恢复innodb表操作：
shell > python innodb_export_import.py --import --dir=/data/mysql.bak/201510140221/ --config=/usr/local/services/mysql/my.cnf
Checking sbtest...
/var/lib/mysql/sbtest/sbtest.ibd
Imported table sbtest.sbtest
MySQL Error 1049: Unknown database ‘201510140246‘
MySQL Error 1049: Unknown database ‘201510140253‘
Checking xiaoboluo...
/var/lib/mysql/xiaoboluo/t1.ibd
Imported table xiaoboluo.t1
/var/lib/mysql/xiaoboluo/t2.ibd
Imported table xiaoboluo.t2
SUMMARY:
Tables Failed: 0
Tables Imported: 3
Databases Total: 4
Tables Total: 3
Tables Skipped: 0
Log file: /data/mysql.bak/201510140221/innodb_import.log
此时可以查看import日志：
shell > cat /data/mysql.bak/201510140221/innodb_import.log
步骤五：进行检测：
shell > python innodb_export_import.py --verify --dir=/data/mysql.bak/201510140221/ --config=/usr/local/services/mysql/my.cnf
Getting a list of databases...
Checking for InnoDB tables...
Database performance_schema... No InnoDB tables
Database sbtest... Detected 1 InnoDB tables
Database test... No InnoDB tables
Database xiaoboluo... Detected 2 InnoDB tables
Checking tables...
Checking xiaoboluo.t1...
Table xiaoboluo.t1 is OK
Checking xiaoboluo.t2...
Table xiaoboluo.t2 is OK
Checking sbtest.sbtest...
Table sbtest.sbtest is OK
SUMMARY:
Tables Ok: 3
Databases Total: 2
Tables Checked: 3
Tables Total: 3
Tables Bad: 0
Log file: /data/mysql.bak/201510140221/201510140259/innodb_check.log
此时可以查看check日志：
shell > cat /data/mysql.bak/201510140221/201510140259/innodb_check.log
参考链接：http://thecpaneladmin.com/how-to-convert-innodb-to-innodb_file_per_table-and-shrink-ibdata1/
除了这个方法，还可以使用mysqldump来备份数据
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