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: 0 mysql> insert into t1 select * from t1; Query OK, 163328 rows affected (2.74 sec) Records: 163328 Duplicates: 0 Warnings: 0 mysql> 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/ibdata1 File information: ID of device containing file: 2049 inode number: 1344553 protection: 100660 (regular file) number of hard links: 1 user ID of owner: 27 group ID of owner: 27 device ID (if special file): 0 blocksize for filesystem I/O: 4096 number of blocks allocated: 463312 time of last access: 1440819443 Sat Aug 29 11:37:23 2015 time of last modification: 1440819463 Sat Aug 29 11:37:43 2015 time of last status change: 1440819463 Sat Aug 29 11:37:43 2015 total size, in bytes: 236978176 (226.000 MiB) Size to process: 236978176 (226.000 MiB) Opening file: /var/lib/mysql/ibdata1 File information: ID of device containing file: 2049 inode number: 1344553 protection: 100660 (regular file) number of hard links: 1 user ID of owner: 27 group ID of owner: 27 device ID (if special file): 0 blocksize for filesystem I/O: 4096 number of blocks allocated: 463312 Opening file: /var/lib/mysql/ibdata1 File information: time of last access: 1440819443 Sat Aug 29 11:37:23 2015 time of last modification: 1440819463 Sat Aug 29 11:37:43 2015 ID of device containing file: 2049 inode number: 1344553 protection: 100660 time of last status change: 1440819463 Sat Aug 29 11:37:43 2015 total size, in bytes: 236978176 (226.000 MiB) Size to process: 236978176 (226.000 MiB) Opening file: /var/lib/mysql/ibdata1 File information: ID of device containing file: 2049 inode number: 1344553 protection: 100660 (regular file) number of hard links: 1 user ID of owner: 27 group ID of owner: 27 device ID (if special file): 0 blocksize for filesystem I/O: 4096 number of blocks allocated: 463312 time of last access: 1440819443 Sat Aug 29 11:37:23 2015 time of last modification: 1440819463 Sat Aug 29 11:37:43 2015 time of last status change: 1440819463 Sat Aug 29 11:37:43 2015 total size, in bytes: 236978176 (226.000 MiB) Size to process: 236978176 (226.000 MiB) (regular file) number of hard links: 1 user ID of owner: 27 group ID of owner: 27 device ID (if special file): 0 blocksize for filesystem I/O: 4096 number of blocks allocated: 463312 time of last access: 1440819443 Sat Aug 29 11:37:23 2015 time of last modification: 1440819463 Sat Aug 29 11:37:43 2015 time of last status change: 1440819463 Sat Aug 29 11:37:43 2015 total size, in bytes: 236978176 (226.000 MiB) Size to process: 236978176 (226.000 MiB) Opening file: /var/lib/mysql/ibdata1 File information: ID of device containing file: 2049 inode number: 1344553 protection: 100660 (regular file) number of hard links: 1 user ID of owner: 27 group ID of owner: 27 device ID (if special file): 0 blocksize for filesystem I/O: 4096 number of blocks allocated: 463312 time of last access: 1440819443 Sat Aug 29 11:37:23 2015 time of last modification: 1440819463 Sat Aug 29 11:37:43 2015 time of last status change: 1440819463 Sat Aug 29 11:37:43 2015 total size, in bytes: 236978176 (226.000 MiB) Size to process: 236978176 (226.000 MiB) Opening file: /var/lib/mysql/ibdata1 File information: ID of device containing file: 2049 inode number: 1344553 protection: 100660 (regular file) number of hard links: 1 user ID of owner: 27 group ID of owner: 27 device ID (if special file): 0 blocksize for filesystem I/O: 4096 number of blocks allocated: 463312 time of last access: 1440819443 Sat Aug 29 11:37:23 2015 time of last modification: 1440819463 Sat Aug 29 11:37:43 2015 time of last status change: 1440819463 Sat Aug 29 11:37:43 2015 Opening file: /var/lib/mysql/ibdata1 File information: ID of device containing file: 2049 inode number: 1344553 protection: 100660 (regular file) number of hard links: 1 user ID of owner: 27 group ID of owner: 27 device ID (if special file): 0 blocksize for filesystem I/O: 4096 number of blocks allocated: 463312 total 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 2015 time of last modification: 1440819463 Sat Aug 29 11:37:43 2015 time of last status change: 1440819463 Sat Aug 29 11:37:43 2015 total size, in bytes: 236978176 (226.000 MiB) Size to process: 236978176 (226.000 MiB) Opening file: /var/lib/mysql/ibdata1 File information: ID of device containing file: 2049 inode number: 1344553 protection: 100660 (regular file) number of hard links: 1 user ID of owner: 27 group ID of owner: 27 device ID (if special file): 0 blocksize for filesystem I/O: 4096 number of blocks allocated: 463312 time of last access: 1440819465 Sat Aug 29 11:37:45 2015 time of last modification: 1440819463 Sat Aug 29 11:37:43 2015 time of last status change: 1440819463 Sat Aug 29 11:37:43 2015 total 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... OK Creating test database ... OK Creating dictionary tables in database test: SYS_TABLES ... OK SYS_COLUMNS ... OK SYS_INDEXES ... OK SYS_FIELDS ... OK All OK Loading dictionary tables data: SYS_TABLES ... 48 recs OK SYS_COLUMNS ... 397 recs OK SYS_INDEXES ... 67 recs OK SYS_FIELDS ... 89 recs OK All 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 "102354211241240398235" "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 -l 380731
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
更多关于MySQL相关内容感兴趣的读者可查看本站专题：《MySQL日志操作技巧大全》、《MySQL事务操作技巧汇总》、《MySQL存储过程技巧大全》、《MySQL数据库锁相关技巧汇总》及《MySQL常用函数大汇总》
希望本文所述对大家MySQL数据库计有所帮助。
