mysql无备份恢复创建独立表空间

本篇内容主要讲解“MySQL无备份恢复创建独立表空间”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“mysql无备份恢复创建独立表空间”吧!

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创建恢复库

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1. mysql> create database helpdb default charset utf8;

2. Query OK, 1 row affected (0.01 sec)

创建恢复表

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1. mysql>

2. CREATE TABLE `newaccount` (

3.   `id` int(11) NOT NULL AUTO_INCREMENT,

4.   `username` varchar(50) DEFAULT NULL,

5.   `userpwd` varchar(50) DEFAULT NULL,

6.   `createtime` datetime DEFAULT NULL,

7.   PRIMARY KEY (`id`)

8. ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

创建对应函数

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1. DELIMITER $$

2. USE `helpdb`$$

3. DROP FUNCTION IF EXISTS `rand_string`$$

4. CREATE DEFINER=`root`@`%` FUNCTION `rand_string`(n INT) RETURNS VARCHAR(255) CHARSET latin1

5. BEGIN

6.     DECLARE chars_str VARCHAR(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';

7.     DECLARE return_str VARCHAR(255) DEFAULT '';

8.     DECLARE i INT DEFAULT 0;

9.     WHILE i < n DO

10.         SET return_str = CONCAT(return_str,SUBSTRING(chars_str , FLOOR(1 + RAND()*62 ),1));

11.         SET i = i +1;

12.     END WHILE;

13.     RETURN return_str;

14.     END$$

15. DELIMITER ;

创建存储过程

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1. DELIMITER $$

2. USE `helpdb` $$

3. DROP PROCEDURE IF EXISTS `p_repeat` $$

4. CREATE DEFINER = `root` @`%` PROCEDURE `p_repeat` ()

5. BEGIN

6.   DECLARE v INT ;

7.   SET v = 0 ;

8.   REPEAT

9.     INSERT INTO newaccount

10.     VALUES

11.       (

12.         NULL,

13.         rand_string (5),

14.         rand_string (15),

15.         NOW()

16.       ) ;

17.     SET v = v + 1 ;

18.     UNTIL v >= 1000

19.   END REPEAT ;

20. END $$

21. DELIMITER ;

调用mysql存储过程插入数据

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1. mysql> CALL p_repeat;

2. Query OK, 1 row affected (1.62 sec)

3. mysql> select count(*) from newaccount;

4. +----------+

5. | count(*) |

6. +----------+

7. | 1000 |

8. +----------+

手动插入数据

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1. mysql> insert into newaccount values(null,'netdata','pwdnetdata',now());

2. Query OK, 1 row affected (0.00 sec)

3. mysql> select * from newaccount where id=1001;

4. +------+----------+------------+---------------------+

5. | id | username | userpwd | createtime |

6. +------+----------+------------+---------------------+

7. | 1001 | netdata | pwdnetdata | 2017-11-12 01:37:52 |

8. +------+----------+------------+---------------------+

9. 1 row in set (0.00 sec)

删除表

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1. mysql> drop table newaccount;

2. Query OK, 0 rows affected (0.01 sec)

关闭库

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1. [root@mysqltest-213-2 undrop-for-innodb-master]# /etc/init.d/mysql stop

2. Shutting down MySQL.. SUCCESS!

3. [root@mysqltest-213-2 undrop-for-innodb-master]#

4. 1 row in set (0.00 sec)

5. [root@mysqltest-213-2 undrop-for-innodb-master]# ./stream_parser -f /var/lib/mysql/ibdata1

6. Opening file: /var/lib/mysql/ibdata1

7. File information:

8. ID of device containing file:        64768

9. inode number:                       393238

10. protection:                         100660 (regular file)

11. number of hard links:                    1

12. user ID of owner:                      498

13. group ID of owner:                     500

14. device ID (if special file):             0

15. blocksize for filesystem I/O:         4096

16. number of blocks allocated:         155648

17. time of last access:            1510422066 Sun Nov 12 01:41:06 2017

18. time of last modification:      1510422066 Sun Nov 12 01:41:06 2017

19. time of last status change:     1510422066 Sun Nov 12 01:41:06 2017

20. total size, in bytes:             79691776 (76.000 MiB)

21. Size to process:                  79691776 (76.000 MiB)

22. Worker(0): 21.03% done. 2017-11-12 01:41:49 ETA(in 00:00:07). Processing speed: 7.984 MiB/sec

All workers finished in 1 sec
解析数据文件，得到table_id=228

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1. [root@mysqltest-213-2 undrop-for-innodb-master]# ./c_parser -4Df pages-ibdata1/FIL_PAGE_INDEX/0000000000000001.page -t dictionary/SYS_TABLES.sql |grep newaccount

2. 00000007A50E 030000024B0D54 SYS_TABLES "helpdb/newaccount" 71 4 1 0 80 "" 57

3. 00000007A50E 030000024B0D54 SYS_TABLES "helpdb/newaccount" 71 4 1 0 80 "" 57

4. SET FOREIGN_KEY_CHECKS=0;

5. LOAD DATA LOCAL INFILE '/usr/local/tools/undrop-for-innodb-master/dumps/default/SYS_TABLES' REPLACE INTO TABLE `SYS_TABLES` FIELDS TERMINATED BY '\t' OPTIONALLY ENCLOSED BY '"' LINES STARTING BY 'SYS_TABLES\t' (`NAME`, `ID`, `N_COLS`, `TYPE`, `MIX_ID`, `MIX_LEN`, `CLUSTER_NAME`, `SPACE`);

根据table_id得到index_id，index_id对应恢复数据文件

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1. [root@mysqltest-213-2 undrop-for-innodb-master]# ./c_parser -4Df pages-ibdata1/FIL_PAGE_INDEX/0000000000000003.page -t dictionary/SYS_INDEXES.sql |grep 71

2. SET FOREIGN_KEY_CHECKS=0;

3. LOAD DATA LOCAL INFILE '/usr/local/tools/undrop-for-innodb-master/dumps/default/SYS_INDEXES' REPLACE INTO TABLE `SYS_INDEXES` FIELDS TERMINATED BY '\t' OPTIONALLY ENCLOSED BY '"' LINES STARTING BY 'SYS_INDEXES\t' (`TABLE_ID`, `ID`, `NAME`, `N_FIELDS`, `TYPE`, `SPACE`, `PAGE_NO`);

4. 00000007A50E 030000024B0BFF SYS_INDEXES 71 74 "PRIMARY" 1 3 57 4294967295

5. 00000007A50E 030000024B0BFF SYS_INDEXES 71 74 "PRIMARY" 1 3 57 4294967295

注意这里还要扫描逻辑卷一遍跟共享表空间恢复不一样的地方

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1. [root@mysqltest-213-2 undrop-for-innodb-master]# ./stream_parser -f /dev/mapper/vg_mysqltest2132-lv_root -t 18G

2. Opening file: /dev/mapper/vg_mysqltest2132-lv_root

3. File information:

4. ID of device containing file:            5

5. inode number:                         6976

6. protection:                          60660 (block device)

7. number of hard links:                    1

8. user ID of owner:                        0

9. group ID of owner:                       6

10. device ID (if special file):         64768

11. blocksize for filesystem I/O:         4096

12. number of blocks allocated:              0

13. time of last access:            1510407590 Sat Nov 11 21:39:50 2017

14. time of last modification:      1510407590 Sat Nov 11 21:39:50 2017

15. time of last status change:     1510407590 Sat Nov 11 21:39:50 2017

16. total size, in bytes:                    0 (0.000 exp(+0))

19. Size to process:               19327352832 (18.000 GiB)

20. Worker(0): 1.08% done. 2017-11-12 01:46:39 ETA(in 00:03:10). Processing speed: 95.945 MiB/sec

21. Worker(0): 2.12% done. 2017-11-12 01:48:14 ETA(in 00:04:42). Processing speed: 63.880 MiB/sec

22. Worker(0): 3.16% done. 2017-11-12 01:54:30 ETA(in 00:10:51). Processing speed: 27.377 MiB/sec

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25. Worker(0): 6.28% done. 2017-11-12 01:48:16 ETA(in 00:04:30). Processing speed: 63.880 MiB/sec

26. Worker(0): 7.32% done. 2017-11-12 01:48:16 ETA(in 00:04:27). Processing speed: 63.896 MiB/sec

27. Worker(0): 8.36% done. 2017-11-12 01:46:47 ETA(in 00:02:56). Processing speed: 95.828 MiB/sec

28. Worker(0): 9.40% done. 2017-11-12 01:46:47 ETA(in 00:02:54). Processing speed: 95.906 MiB/sec

29. Worker(0): 10.44% done. 2017-11-12 01:46:47 ETA(in 00:02:52). Processing speed: 95.891 MiB/sec

30. Worker(0): 11.49% done. 2017-11-12 01:45:20 ETA(in 00:01:24). Processing speed: 192.000 MiB/sec

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83. All workers finished in 83 sec

查看对应数据页文件

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1. [root@mysqltest-213-2 undrop-for-innodb-master]# ls pages-vg_mysqltest2132-lv_root/FIL_PAGE_INDEX/0000000000000074.page

2. pages-vg_mysqltest2132-lv_root/FIL_PAGE_INDEX/0000000000000074.page

恢复表结构

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1. [root@mysqltest-213-2 undrop-for-innodb-master]# cat newaccount.sql

2. CREATE TABLE `newaccount` (

3.   `id` int(11) NOT NULL AUTO_INCREMENT,

4.   `username` varchar(50) DEFAULT NULL,

5.   `userpwd` varchar(50) DEFAULT NULL,

6.   `createtime` datetime DEFAULT NULL,

7.   PRIMARY KEY (`id`)

8. ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

抽取数据

点击(此处)折叠或打开

1. [root@mysqltest-213-2 undrop-for-innodb-master]# ./c_parser -6f pages-ibdata1/FIL_PAGE_INDEX/0000000000000074.page -t newaccount.sql |  head -5

2. -- Page id: 5, Format: COMPACT, Records list: Valid, Expected records: (301 301)

3. 00000007A1B5 AC0000015F0110 newaccount 151 "0GdUH" "DTo9njhkAO9adoc" "2017-11-12 01:36:10.0"

4. 00000007A1B6 AD000001600110 newaccount 152 "CoT8Q" "DtjZQ4Iaz9UVKOD" "2017-11-12 01:36:10.0"

5. 00000007A1B7 AE000001610110 newaccount 153 "CZWzT" "z1f1aEyGzEnLzo7" "2017-11-12 01:36:10.0"

6. 00000007A1B8 AF000001620110 newaccount 154 "eEpWh" "p50DYNW9J41Hkkv" "2017-11-12 01:36:10.0"

恢复数据
抽取数据转换成文件

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1. [root@mysqltest-213-2 undrop-for-innodb-master]# ./c_parser -6f pages-vg_mysqltest2132-lv_root/FIL_PAGE_INDEX/0000000000000074.page -t newaccount.sql -o dumps/default/newaccount.dump -l dumps/default/newaccount.sql

2. [root@mysqltest-213-2 undrop-for-innodb-master]# ls -alh dumps/default/newaccount.*

3. -rw-r--r--. 1 root root 92K Nov 12 01:48 dumps/default/newaccount.dump

4. -rw-r--r--. 1 root root 244 Nov 12 01:48 dumps/default/newaccount.sql

恢复数据

点击(此处)折叠或打开

1. mysql> source dumps/default/newaccount.sql;

2. Query OK, 0 rows affected (0.00 sec)

3. Query OK, 6002 rows affected (0.06 sec)

4. Records: 6002  Deleted: 0  Skipped: 0  Warnings: 0

5. mysql> select count(*) from newaccount;

6. +----------+

7. | count(*) |

8. +----------+

9. | 1001 |

10. +----------+

11. 1 row in set (0.00 sec)

12. mysql> checksum table newaccount;

13. +-------------------+------------+

14. | Table | Checksum |

15. +-------------------+------------+

16. | helpdb.newaccount | 2512700176 |

17. +-------------------+------------+

18. 1 row in set (0.03 sec)

到此，相信大家对“mysql无备份恢复创建独立表空间”有了更深的了解，不妨来实际操作一番吧！这里是创新互联网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！