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 07:00:0000000002141c 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 07:00:0000000002141d 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 07:00:0000000002141e 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 07:00:0000000002141f 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 07:00:00000000021420 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 07:00:00000000021421 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 07:00:00000000021422 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 07:00:00000000021423 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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