Mysql 独享表空间

1.查看当前的表空间:

[mysql@master ~]$ mysql -uroot -hlocalhost
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 55
Server version: 5.6.16-log Source distribution

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Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql>  show variables like 'innodb_data%';  
+-----------------------+------------------------+
| Variable_name         | Value                  |
+-----------------------+------------------------+
| innodb_data_file_path | ibdata1:12M:autoextend |
| innodb_data_home_dir  |                        |
+-----------------------+------------------------+
2 rows in set (0.07 sec)

[mysql@master data]$ ls -ltrh ibdata1 
-rw-rw----. 1 mysql mysql 460M Mar 14 13:47 ibdata1

2.
mysql> show variables like '%per_table%';    
+-----------------------+-------+
| Variable_name         | Value |
+-----------------------+-------+
| innodb_file_per_table | ON    |
+-----------------------+-------+
1 row in set (0.06 sec)

说明：OFF代表mysql是共享表空间，也就是所有库的数据都存放在一个ibdate1文件中


独享表空间存储方式使用“.ibd”文件来存放数据，且每个表一个“.ibd”文件，文件存放在和MyISAM 数据相同的位置，由datadir确定。如果选用共享存储表空间来存放数据，则会使用ibdata 文件来

存放，所有表共同使用一个（或者多个，可自行配置）ibdata 文件。ibdata 文件可以通过innodb_data_home_dir 和innodb_data_file_path