mysql无备份恢复创建独立表空间

2025-03-18 技术教程

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!

创建恢复库

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mysql> create database helpdb default charset utf8;

Query OK, 1 row affected (0.01 sec)

创建恢复表

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mysql>

CREATE TABLE `newaccount` (

`id` int(11) NOT NULL AUTO_INCREMENT,

`username` varchar(50) DEFAULT NULL,

`userpwd` varchar(50) DEFAULT NULL,

`createtime` datetime DEFAULT NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

创建对应函数

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DELIMITER $$

USE `helpdb`$$

DROP FUNCTION IF EXISTS `rand_string`$$

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

BEGIN

DECLARE chars_str VARCHAR(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';

DECLARE return_str VARCHAR(255) DEFAULT '';

DECLARE i INT DEFAULT 0;

WHILE i < n DO

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

SET i = i +1;

END WHILE;

RETURN return_str;

END$$

DELIMITER ;

创建存储过程

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DELIMITER $$

USE `helpdb` $$

DROP PROCEDURE IF EXISTS `p_repeat` $$

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

BEGIN

DECLARE v INT ;

SET v = 0 ;

REPEAT

INSERT INTO newaccount

VALUES

(

NULL,

rand_string (5),

rand_string (15),

NOW()

) ;

SET v = v + 1 ;

UNTIL v >= 1000

END REPEAT ;

END $$

DELIMITER ;

调用mysql存储过程插入数据

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mysql> CALL p_repeat;

Query OK, 1 row affected (1.62 sec)

mysql> select count(*) from newaccount;

+----------+

| count(*) |

+----------+

| 1000 |

+----------+

手动插入数据

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

Query OK, 1 row affected (0.00 sec)

mysql> select * from newaccount where id=1001;

+------+----------+------------+---------------------+

+------+----------+------------+---------------------+

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

+------+----------+------------+---------------------+

1 row in set (0.00 sec)

删除表

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mysql> drop table newaccount;

Query OK, 0 rows affected (0.01 sec)

关闭库

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

Shutting down MySQL.. SUCCESS!

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

1 row in set (0.00 sec)

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

Opening file: /var/lib/mysql/ibdata1

File information:

ID of device containing file: 64768

inode number: 393238

protection: 100660 (regular file)

number of hard links: 1

user ID of owner: 498

group ID of owner: 500

device ID (if special file): 0

blocksize for filesystem I/O: 4096

number of blocks allocated: 155648

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

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

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

total size, in bytes: 79691776 (76.000 MiB)

Size to process: 79691776 (76.000 MiB)

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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[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

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

SET FOREIGN_KEY_CHECKS=0;

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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[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

SET FOREIGN_KEY_CHECKS=0;

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`);

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

Opening file: /dev/mapper/vg_mysqltest2132-lv_root

File information:

ID of device containing file: 5

inode number: 6976

protection: 60660 (block device)

number of hard links: 1

user ID of owner: 0

group ID of owner: 6

device ID (if special file): 64768

blocksize for filesystem I/O: 4096

number of blocks allocated: 0

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

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

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

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

Size to process: 19327352832 (18.000 GiB)

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

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

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

Worker(0): 4.20% done. 2017-11-12 01:46:45 ETA(in 00:03:04). Processing speed: 95.844 MiB/sec

Worker(0): 5.24% done. 2017-11-12 01:46:45 ETA(in 00:03:02). Processing speed: 95.820 MiB/sec

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

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

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

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

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

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

Worker(0): 12.53% done. 2017-11-12 01:46:46 ETA(in 00:02:48). Processing speed: 95.883 MiB/sec

Worker(0): 13.57% done. 2017-11-12 01:45:22 ETA(in 00:01:23). Processing speed: 191.938 MiB/sec

Worker(0): 15.09% done. 2017-11-12 01:44:55 ETA(in 00:00:55). Processing speed: 280.000 MiB/sec

Worker(0): 17.13% done. 2017-11-12 01:44:41 ETA(in 00:00:40). Processing speed: 376.000 MiB/sec

Worker(0): 19.04% done. 2017-11-12 01:44:44 ETA(in 00:00:42). Processing speed: 352.000 MiB/sec

Worker(0): 20.99% done. 2017-11-12 01:44:43 ETA(in 00:00:40). Processing speed: 360.000 MiB/sec

Worker(0): 22.90% done. 2017-11-12 01:44:44 ETA(in 00:00:40). Processing speed: 352.000 MiB/sec

Worker(0): 24.81% done. 2017-11-12 01:44:44 ETA(in 00:00:39). Processing speed: 352.000 MiB/sec

Worker(0): 26.46% done. 2017-11-12 01:44:50 ETA(in 00:00:44). Processing speed: 304.000 MiB/sec

Worker(0): 28.54% done. 2017-11-12 01:44:41 ETA(in 00:00:34). Processing speed: 384.000 MiB/sec

Worker(0): 30.54% done. 2017-11-12 01:44:42 ETA(in 00:00:34). Processing speed: 368.000 MiB/sec

Worker(0): 32.45% done. 2017-11-12 01:44:44 ETA(in 00:00:35). Processing speed: 352.000 MiB/sec

Worker(0): 34.05% done. 2017-11-12 01:44:51 ETA(in 00:00:41). Processing speed: 296.000 MiB/sec

Worker(0): 35.49% done. 2017-11-12 01:44:56 ETA(in 00:00:45). Processing speed: 263.930 MiB/sec

Worker(0): 37.44% done. 2017-11-12 01:44:44 ETA(in 00:00:32). Processing speed: 360.000 MiB/sec

Worker(0): 39.39% done. 2017-11-12 01:44:44 ETA(in 00:00:31). Processing speed: 360.000 MiB/sec

Worker(0): 40.95% done. 2017-11-12 01:44:51 ETA(in 00:00:37). Processing speed: 288.000 MiB/sec

Worker(0): 42.95% done. 2017-11-12 01:44:43 ETA(in 00:00:28). Processing speed: 368.000 MiB/sec

Worker(0): 44.86% done. 2017-11-12 01:44:44 ETA(in 00:00:28). Processing speed: 352.000 MiB/sec

Worker(0): 45.90% done. 2017-11-12 01:45:09 ETA(in 00:00:52). Processing speed: 191.750 MiB/sec

Worker(0): 46.94% done. 2017-11-12 01:45:08 ETA(in 00:00:50). Processing speed: 192.000 MiB/sec

Worker(0): 48.90% done. 2017-11-12 01:44:45 ETA(in 00:00:26). Processing speed: 360.000 MiB/sec

Worker(0): 50.89% done. 2017-11-12 01:44:44 ETA(in 00:00:24). Processing speed: 368.000 MiB/sec

Worker(0): 52.80% done. 2017-11-12 01:44:45 ETA(in 00:00:24). Processing speed: 352.000 MiB/sec

Worker(0): 54.71% done. 2017-11-12 01:44:45 ETA(in 00:00:23). Processing speed: 352.000 MiB/sec

Worker(0): 56.27% done. 2017-11-12 01:44:50 ETA(in 00:00:27). Processing speed: 288.000 MiB/sec

Worker(0): 57.66% done. 2017-11-12 01:44:54 ETA(in 00:00:30). Processing speed: 255.937 MiB/sec

Worker(0): 59.70% done. 2017-11-12 01:44:44 ETA(in 00:00:19). Processing speed: 376.000 MiB/sec

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Worker(0): 76.02% done. 2017-11-12 01:44:45 ETA(in 00:00:11). Processing speed: 376.000 MiB/sec

Worker(0): 77.76% done. 2017-11-12 01:44:47 ETA(in 00:00:12). Processing speed: 320.000 MiB/sec

Worker(0): 78.80% done. 2017-11-12 01:44:56 ETA(in 00:00:20). Processing speed: 191.891 MiB/sec

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Worker(0): 97.11% done. 2017-11-12 01:44:51 ETA(in 00:00:01). Processing speed: 336.000 MiB/sec

All workers finished in 83 sec

查看对应数据页文件

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

pages-vg_mysqltest2132-lv_root/FIL_PAGE_INDEX/0000000000000074.page

恢复表结构

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

CREATE TABLE `newaccount` (

`id` int(11) NOT NULL AUTO_INCREMENT,

`username` varchar(50) DEFAULT NULL,

`userpwd` varchar(50) DEFAULT NULL,

`createtime` datetime DEFAULT NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

抽取数据

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

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

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

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

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

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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[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

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

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

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

恢复数据

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mysql> source dumps/default/newaccount.sql;

Query OK, 0 rows affected (0.00 sec)

Query OK, 6002 rows affected (0.06 sec)

Records: 6002 Deleted: 0 Skipped: 0 Warnings: 0

mysql> select count(*) from newaccount;

+----------+

| count(*) |