MySQL异常恢复之无主键情况下innodb数据恢复的方法

数据库  /  管理员 发布于 6年前   188

本文讲述了MySQL异常恢复之无主键情况下innodb数据恢复的方法。分享给大家供大家参考，具体如下：

在mysql的innodb引擎的数据库异常恢复中,一般都要求有主键或者唯一index,其实这个不是必须的,当没有index信息之时,可以在整个表级别的index_id进行恢复

创建模拟表―无主键

mysql> CREATE TABLE `t1` (  ->  `messageId` varchar(30) character set utf8 NOT NULL,  ->  `tokenId` varchar(20) character set utf8 NOT NULL,  ->  `mobile` varchar(14) character set utf8 default NULL,  ->  `msgFormat` int(1) NOT NULL,  ->  `msgContent` varchar(1000) character set utf8 default NULL,  ->  `scheduleDate` timestamp NOT NULL default '0000-00-00 00:00:00',  ->  `deliverState` int(1) default NULL,  ->  `deliverdTime` timestamp NOT NULL default '0000-00-00 00:00:00'  -> ) ENGINE=INnodb DEFAULT CHARSET=utf8;Query OK, 0 rows affected (0.00 sec)mysql> insert into t1 select * from sms_service.sms_send_record;Query OK, 11 rows affected (0.00 sec)Records: 11 Duplicates: 0 Warnings: 0…………mysql> insert into t1 select * from t1;Query OK, 81664 rows affected (2.86 sec)Records: 81664 Duplicates: 0 Warnings: 0mysql> insert into t1 select * from t1;Query OK, 163328 rows affected (2.74 sec)Records: 163328 Duplicates: 0 Warnings: 0mysql> select count(*) from t1;+----------+| count(*) |+----------+|  326656 | +----------+1 row in set (0.15 sec)

解析innodb文件

[root@web103 mysql_recovery]# rm -rf pages-ibdata1/[root@web103 mysql_recovery]# ./stream_parser -f /var/lib/mysql/ibdata1 Opening file: /var/lib/mysql/ibdata1File information:ID of device containing file:     2049inode number:           1344553protection: 100660 (regular file)number of hard links:          1user ID of owner:27group ID of owner:           27device ID (if special file):       0blocksize for filesystem I/O:     4096number of blocks allocated:     463312time of last access:      1440819443 Sat Aug 29 11:37:23 2015time of last modification:   1440819463 Sat Aug 29 11:37:43 2015time of last status change:   1440819463 Sat Aug 29 11:37:43 2015total size, in bytes:      236978176 (226.000 MiB)Size to process:         236978176 (226.000 MiB)Opening file: /var/lib/mysql/ibdata1File information:ID of device containing file:     2049inode number:           1344553protection: 100660 (regular file)number of hard links:          1user ID of owner:27group ID of owner:           27device ID (if special file):       0blocksize for filesystem I/O:     4096number of blocks allocated:     463312Opening file: /var/lib/mysql/ibdata1File information:time of last access:      1440819443 Sat Aug 29 11:37:23 2015time of last modification:   1440819463 Sat Aug 29 11:37:43 2015ID of device containing file:     2049inode number:           1344553protection: 100660 time of last status change:   1440819463 Sat Aug 29 11:37:43 2015total size, in bytes:      236978176 (226.000 MiB)Size to process:         236978176 (226.000 MiB)Opening file: /var/lib/mysql/ibdata1File information:ID of device containing file:     2049inode number:           1344553protection: 100660 (regular file)number of hard links:          1user ID of owner:27group ID of owner:           27device ID (if special file):       0blocksize for filesystem I/O:     4096number of blocks allocated:     463312time of last access:      1440819443 Sat Aug 29 11:37:23 2015time of last modification:   1440819463 Sat Aug 29 11:37:43 2015time of last status change:   1440819463 Sat Aug 29 11:37:43 2015total size, in bytes:      236978176 (226.000 MiB)Size to process:         236978176 (226.000 MiB)(regular file)number of hard links:          1user ID of owner:27group ID of owner:           27device ID (if special file):       0blocksize for filesystem I/O:     4096number of blocks allocated:     463312time of last access:      1440819443 Sat Aug 29 11:37:23 2015time of last modification:   1440819463 Sat Aug 29 11:37:43 2015time of last status change:   1440819463 Sat Aug 29 11:37:43 2015total size, in bytes:      236978176 (226.000 MiB)Size to process:         236978176 (226.000 MiB)Opening file: /var/lib/mysql/ibdata1File information:ID of device containing file:     2049inode number:           1344553protection: 100660 (regular file)number of hard links:          1user ID of owner:27group ID of owner:           27device ID (if special file):       0blocksize for filesystem I/O:     4096number of blocks allocated:     463312time of last access:      1440819443 Sat Aug 29 11:37:23 2015time of last modification:   1440819463 Sat Aug 29 11:37:43 2015time of last status change:   1440819463 Sat Aug 29 11:37:43 2015total size, in bytes:      236978176 (226.000 MiB)Size to process:         236978176 (226.000 MiB)Opening file: /var/lib/mysql/ibdata1File information:ID of device containing file:     2049inode number:           1344553protection: 100660 (regular file)number of hard links:          1user ID of owner:27group ID of owner:           27device ID (if special file):       0blocksize for filesystem I/O:     4096number of blocks allocated:     463312time of last access:      1440819443 Sat Aug 29 11:37:23 2015time of last modification:   1440819463 Sat Aug 29 11:37:43 2015time of last status change:   1440819463 Sat Aug 29 11:37:43 2015Opening file: /var/lib/mysql/ibdata1File information:ID of device containing file:     2049inode number:           1344553protection: 100660 (regular file)number of hard links:          1user ID of owner:27group ID of owner:           27device ID (if special file):       0blocksize for filesystem I/O:     4096number of blocks allocated:     463312total size, in bytes:      236978176 (226.000 MiB)Size to process:         236978176 (226.000 MiB)time of last access:      1440819443 Sat Aug 29 11:37:23 2015time of last modification:   1440819463 Sat Aug 29 11:37:43 2015time of last status change:   1440819463 Sat Aug 29 11:37:43 2015total size, in bytes:      236978176 (226.000 MiB)Size to process:         236978176 (226.000 MiB)Opening file: /var/lib/mysql/ibdata1File information:ID of device containing file:     2049inode number:           1344553protection: 100660 (regular file)number of hard links:          1user ID of owner:27group ID of owner:           27device ID (if special file):       0blocksize for filesystem I/O:     4096number of blocks allocated:     463312time of last access:      1440819465 Sat Aug 29 11:37:45 2015time of last modification:   1440819463 Sat Aug 29 11:37:43 2015time of last status change:   1440819463 Sat Aug 29 11:37:43 2015total size, in bytes:      236978176 (226.000 MiB)Size to process:         236978176 (226.000 MiB)All workers finished in 0 sec

恢复数据字典

[root@web103 mysql_recovery]# ./recover_dictionary.sh Generating dictionary tables dumps... OKCreating test database ... OKCreating dictionary tables in database test:SYS_TABLES ... OKSYS_COLUMNS ... OKSYS_INDEXES ... OKSYS_FIELDS ... OKAll OKLoading dictionary tables data:SYS_TABLES ... 48 recs OKSYS_COLUMNS ... 397 recs OKSYS_INDEXES ... 67 recs OKSYS_FIELDS ... 89 recs OKAll OK

分析数据字典,找出来index_id

这里需要注意对于没有主键的表恢复,我们对应的类型是GEN_CLUST_INDEX

mysql> select * from SYS_TABLES where name='test/t1';+----------------------------------------+-----+-------------+------+--------+---------+--------------+-------+| NAME      | ID | N_COLS   | TYPE | MIX_ID | MIX_LEN | CLUSTER_NAME | SPACE |+----------------------------------------+-----+-------------+------+--------+---------+--------------+-------+| test/t1    | 100 |      8 |  1 |   0 |    0 |       |   0 | +----------------------------------------+-----+-------------+------+--------+---------+--------------+-------+40 rows in set (0.00 sec) mysql> SELECT * FROM SYS_INDEXES where table_id=100;+----------+-----+------------------------------+----------+------+-------+------------+| TABLE_ID | ID | NAME | N_FIELDS | TYPE | SPACE | PAGE_NO  |+----------+-----+------------------------------+----------+------+-------+------------+|   100 | 119 | GEN_CLUST_INDEX       |    0 |  1 |   0 |    2951 | +----------+-----+------------------------------+----------+------+-------+------------+67 rows in set (0.00 sec)

恢复数据

root@web103 mysql_recovery]# ./c_parser -5f pages-ibdata1/FIL_PAGE_INDEX/0000000000000119.page -t dictionary/t1.sql >/tmp/2.txt 2>2.sql[root@web103 mysql_recovery]# more /tmp/2.txt-- Page id: 10848, Format: COMPACT, Records list: Valid, Expected records: (73 73)00000002141B  0000009924F2  80000027133548 t1   "82334502212106951"   "SDK-BBX-010-18681"   "13718311436"  8    "尊敬的用户您好：您的手机验证码为916515如非本人操作，请拨打奥斯卡客服：400-620-7575。"    "2010-01-01 00:00:00"  0    "1970-01-01 07:00:00"00000002141C  0000009924F2  80000027133558 t1   "82339012756833423"   "SDK-BBX-010-18681"   "13718311436"  8    "尊敬的用户您好：您的手机验证码为396108如非本人操作，请拨打奥斯卡客服：400-620-7575。"    "2010-01-01 00:00:00"  0    "1970-01-01 07:00:00"00000002141D  0000009924F2  80000027133568 t1   "8234322198577796"   "SDK-BBX-010-18681"   "13718311436"  8    "尊敬的用户您好：您的手机验证码为935297如非本人操作，请拨打奥斯卡客服：400-620-7575。"    "2010-01-01 00:00:00"  0    "1970-01-01 07:00:00"00000002141E  0000009924F2  80000027133578 t1   "10235259536125650"   "SDK-BBX-010-18681"   "13718311436"  8    "尊敬的用户您好：您的手机验证码为474851如非本人操作，请拨打奥斯卡客服：400-620-7575。"    "2010-01-01 00:00:00"  0    "1970-01-01 07:00:00"00000002141F  0000009924F2  80000027133588 t1   "10235353811295807"   "SDK-BBX-010-18681"   "13718311436"  8    "尊敬的用户您好：您的手机验证码为444632如非本人操作，请拨打奥斯卡客服：400-620-7575。"    "2010-01-01 00:00:00"  0    "1970-01-01 07:00:00"000000021420  0000009924F2  80000027133598 t1   "102354211240398235"  "SDK-BBX-010-18681"   "13718311436"  8    "尊敬的用户您好：您的手机验证码为478503如非本人操作，请拨打奥斯卡客服：400-620-7575。"    "2010-01-01 00:00:00"  0    "1970-01-01 07:00:00"000000021421  0000009924F2  800000271335A8 t1   "102354554052884567"  "SDK-BBX-010-18681"   "13718311436"  8    "尊敬的用户您好：您的手机验证码为216825如非本人操作，请拨打奥斯卡客服：400-620-7575。"    "2010-01-01 00:00:00"  0    "1970-01-01 07:00:00"000000021422  0000009924F2  800000271335B8 t1   "132213454294519126"  "SDK-BBX-010-18681"   "13718311436"  8    "尊敬的用户您好：您的手机验证码为854812如非本人操作，请拨打奥斯卡客服：400-620-7575。"    "2010-01-01 00:00:00"  0    "1970-01-01 07:00:00"000000021423  0000009924F2  800000271335C8 t1   "82329022242584577"   "SDK-BBX-010-18681"   "13718311436"  8    "尊敬的用户您好：您的手机验证码为253127如非本人操作，请拨打奥斯卡客服：400-620-7575。"    "2010-01-01 00:00:00"  0    "2015-08-26 22:02:17"…………[root@web103 mysql_recovery]# cat /tmp/2.txt|grep -v "Page id:"|wc -l380731

因为没有主键,使得恢复出来记录可能有一些重复,整体而言,可以较为完美的恢复数据

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