mysql无备份恢复搭建独立表空间
发布时间：2022-01-15 19:47:12 所属栏目：MySql教程 来源：互联网
导读：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 点击(此处)折叠或打开 mysql create database helpdb default char
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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 点击(此处)折叠或打开 mysql> create database helpdb default charset utf8; Query OK, 1 row affected (0.01 sec) 创建恢复表 点击(此处)折叠或打开 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 点击(此处)折叠或打开 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 点击(此处)折叠或打开 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 点击(此处)折叠或打开 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 点击(此处)折叠或打开 mysql> insert into newaccount values(null,'netdata','pwdnetdata',now()); Query OK, 1 row affected (0.00 sec) mysql> select * from newaccount where id=1001; +------+----------+------------+---------------------+ | id | username | userpwd | createtime | +------+----------+------------+---------------------+ | 1001 | netdata | pwdnetdata | 2017-11-12 01:37:52 | +------+----------+------------+---------------------+ 1 row in set (0.00 sec) 删除表 点击(此处)折叠或打开 mysql> drop table newaccount; Query OK, 0 rows affected (0.01 sec) 关闭库 点击(此处)折叠或打开 [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 点击(此处)折叠或打开 [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 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_TABLESt' (`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 点击(此处)折叠或打开 [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_INDEXESt' (`TABLE_ID`, `ID`, `NAME`, `N_FIELDS`, `TYPE`, `SPACE`, `PAGE_NO`); 00000007A50E 030000024B0BFF SYS_INDEXES 71 74 "PRIMARY" 1 3 57 4294967295 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 点击(此处)折叠或打开 [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). 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Processing speed: 336.000 MiB/sec All workers finished in 83 sec 查看对应数据页文件 点击(此处)折叠或打开 [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 点击(此处)折叠或打开 [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 点击(此处)折叠或打开 [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 点击(此处)折叠或打开 [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 点击(此处)折叠或打开 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(*) | +----------+ | 1001 | +----------+ 1 row in set (0.00 sec) mysql> checksum table newaccount; +-------------------+------------+ | Table | Checksum | +-------------------+------------+ | helpdb.newaccount | 2512700176 | +-------------------+------------+ 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！ （编辑：晋中站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
