Mysql下传输表空间

源库 test
目标库 tes
把test库下的 t3表，传输到tes库下面

步骤
1 目标库上建立与原库一样的表t3
2 卸载目标库下的t3的表空间
3 在源库执行表空间导出
4 将源库上的导出文件复制到目标库，并修改权限
5 源库上执行解锁操作
6 目标库上执行表空间导入

-- 源库，test下的t3表

mysql> select * from t3;
+------+-------+------+
| year | month | day  |
+------+-------+------+
| 2018 |     1 |    1 |
| 2018 |     1 |    2 |
| 2018 |     1 |    3 |
| 2018 |     1 |    4 |
| 2018 |     1 |    5 |
+------+-------+------+
5 rows in set (0.00 sec)


mysql> select database();
+------------+
| database() |
+------------+
| test       |
+------------+
1 row in set (0.00 sec)

mysql>

--目标库tes下，创建与源库一样的表t3

use tes; 
create table t3(year int,month int,day int);

-- 卸载目标库tes下t3表的表空间,然后发现 tes库下面的t3.idb不见了

use tes;
alter table t3 discard tablespace;

mysql> alter table t3 discard tablespace;
Query OK, 0 rows affected (0.01 sec)

mysql>

[root@test tes]# ls t3*
t3.frm  t3.ibd
[root@test tes]# ls t3*
t3.frm
[root@test tes]#

-- 然后在源库test执行表空间导出操作

use test;
flush table t3 for export;


mysql> select database();
+------------+
| database() |
+------------+
| test       |
+------------+
1 row in set (0.00 sec)

mysql> flush table t3 for export;
Query OK, 0 rows affected (0.00 sec)

mysql>

-- 导出后，会发现源库test下多了一个t3.cfg文件

[root@test test]# ls t3*
t3.cfg  t3.frm  t3.ibd
[root@test test]#

-- 将源库test下的t3.ibd和t3.cfg文件复制到目标库tes下并修改权限

[root@test test]# cp t3.cfg ../tes/
[root@test test]# cp t3.ibd ../tes/
[root@test tes]# ls -l t3.*
-rw-r-----. 1 root  root    481 Nov 14 11:19 t3.cfg
-rw-rw----. 1 mysql mysql  8620 Nov 14 11:08 t3.frm
-rw-r-----. 1 root  root  98304 Nov 14 11:19 t3.ibd
[root@test tes]#

[root@test tes]# ls -l t3.*
-rw-rw----. 1 mysql mysql   481 Nov 14 11:19 t3.cfg
-rw-rw----. 1 mysql mysql  8620 Nov 14 11:08 t3.frm
-rw-rw----. 1 mysql mysql 98304 Nov 14 11:19 t3.ibd
[root@test tes]#

-- 将源库test 执行解锁操作

unlock tables;

mysql> unlock tables;
Query OK, 0 rows affected (0.00 sec)

mysql>

-- 在目标库，执行表空间导入操作

alter table t3 import tablespace;

mysql> use tes;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select * from t3;
ERROR 1814 (HY000): Tablespace has been discarded for table 't3'
mysql> select database();
+------------+
| database() |
+------------+
| tes        |
+------------+
1 row in set (0.00 sec)

mysql> alter table t3 import tablespace;
Query OK, 0 rows affected (0.18 sec)

mysql> select * from t3;
+------+-------+------+
| year | month | day  |
+------+-------+------+
| 2018 |     1 |    1 |
| 2018 |     1 |    2 |
| 2018 |     1 |    3 |
| 2018 |     1 |    4 |
| 2018 |     1 |    5 |
+------+-------+------+
5 rows in set (0.00 sec)

mysql>

END

Mysql下传输表空间

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