MySQL异常恢复之无主键情况下innodb数据恢复的方法

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）00000002141B0000009924F280000027133548 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"00000002141C0000009924F280000027133558 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"00000002141D0000009924F280000027133568 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"00000002141E0000009924F280000027133578 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"00000002141F0000009924F280000027133588 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"0000000214200000009924F280000027133598 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"0000000214210000009924F2800000271335A8 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"0000000214220000009924F2800000271335B8 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"0000000214230000009924F2800000271335C8 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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