技术头条 - 一个快速在微博传播文章的方式     搜索本站
您现在的位置：首页 --> MySQL --> [MySQL异常恢复]无主键情况下innodb数据恢复

[MySQL异常恢复]无主键情况下innodb数据恢复

浏览:696次  出处信息

   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      "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 -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。

建议继续学习：

  1. 用 LD_PRELOAD 挽救被误删的 libc.so.6    (阅读：4162)
  2. MySQL从压缩文件恢复数据    (阅读：3696)
  3. 参数_smon_internal_errlimit与数据库恢复    (阅读：3192)
  4. MySQL 备份和其恢复机制原理简述    (阅读：3131)
  5. 用bin日志中恢复MySQL数据库    (阅读：2688)
  6. 用CloneZilla制作紧急恢复分区    (阅读：2640)
  7. Zmanda让MySQL的备份与恢复更加方便快捷灵活    (阅读：2329)
  8. InnoDB主键设计    (阅读：2297)
  9. 随机主键对InnoDB插入性能的影响    (阅读：2257)
  10. 当logfile被误删除后    (阅读：2189)
QQ技术交流群：445447336，欢迎加入！
扫一扫订阅我的微信号：IT技术博客大学习
<< 前一篇：SQL 新手指南
后一篇：MySQL索引原理与慢查询优化 >>
文章信息
© 2009 - 2024 by blogread.cn 微博：@IT技术博客大学习

京ICP备15002552号-1