sql server 事务日志备份异常恢复案例---惜分飞

有客户的sql server数据库运行在双机环境中,由于心跳网络异常导致双机频繁切换最终数据库损坏DBCC检查报大量错误

DBCC CHECKDB('OLTP') WITH NO_INFOMSGS, ALL_ERRORMSGS Msg 8909, Level 16, State 1, Line 1 Table error: Object ID 0, index ID -1, partition ID 0, alloc unit ID 28147935764938752 (typeUnknown), page ID (1:33059984) contains an incorrect page IDinits page header. The PageIdinthe page header = (68:3276868). Msg 8909, Level 16, State 1, Line 1 Table error: Object ID 0, index ID -1, partition ID 0, alloc unit ID 11540680206712832 (typeUnknown), page ID (1:33059985) contains an incorrect page IDinits page header. The PageIdinthe page header = (102:6488116). Msg 8909, Level 16, State 1, Line 1 Table error: Object ID 0, index ID -1, partition ID 0, alloc unit ID 16888988233302016 (typeUnknown), page ID (1:33059986) contains an incorrect page IDinits page header. The PageIdinthe page header = (93:6619252). Msg 8909, Level 16, State 1, Line 1 Table error: Object ID 0, index ID -1, partition ID 0, alloc unit ID 16888988233302016 (typeUnknown), page ID (1:33059987) contains an incorrect page IDinits page header. The PageIdinthe page header = (93:6619252). Msg 8909, Level 16, State 1, Line 1 Table error: Object ID 0, index ID -1, partition ID 0, alloc unit ID 16888988233302016 (typeUnknown), page ID (1:33059988) contains an incorrect page IDinits page header. The PageIdinthe page header = (93:6619252). Msg 8909, Level 16, State 1, Line 1 Table error: Object ID 0, index ID -1, partition ID 0, alloc unit ID 28147836977938432 (typeUnknown), page ID (1:33059989) contains an incorrect page IDinits page header. The PageIdinthe page header = (73:6619248). Msg 8909, Level 16, State 1, Line 1 …………………… Object ID 1961110077, index ID 0, partition ID 72057594217627648, alloc unit ID 72057594256687104 (typeIn-row data): Page (1:36535484) could not be processed. See other errorsfordetails. Msg 8928, Level 16, State 1, Line 1 Object ID 1961110077, index ID 0, partition ID 72057594217627648, alloc unit ID 72057594256687104 (typeIn-row data): Page (1:36535485) could not be processed. See other errorsfordetails. Msg 8928, Level 16, State 1, Line 1 Object ID 1961110077, index ID 0, partition ID 72057594217627648, alloc unit ID 72057594256687104 (typeIn-row data): Page (1:36535486) could not be processed. See other errorsfordetails. Msg 8928, Level 16, State 1, Line 1 Object ID 1961110077, index ID 0, partition ID 72057594217627648, alloc unit ID 72057594256687104 (typeIn-row data): Page (1:36535487) could not be processed. See other errorsfordetails. CHECKDB found 0 allocation errors and 24 consistency errorsintable'CIOMessage'(object ID 1961110077). CHECKDB found 0 allocation errors and 17955 consistency errorsindatabase'OLTP'. Completiontime: 2025-11-19T17:13:03.2762122+08:00

客户每天做全库备份,每4小时做事务日志备份,备份类似这样的情况

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客户尝试使用全备进行恢复,结果发现只有13日的全备是好的,可以还原出来数据库,其他备份还原直接报错,基于这样的情况,可以希望把数据恢复到11月19日.我接手这个故障之后,先尝试还原13日的备份

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然后尝试人工应用事务日志备份,类似命令

RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_13_030001_7745248.trn'WITH NORECOVERY RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_13_060001_3581210.trn'WITH NORECOVERY RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_13_090001_2856408.trn'WITH NORECOVERY RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_13_120002_0713663.trn'WITH NORECOVERY RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_13_150001_7305524.trn'WITH NORECOVERY RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_13_180000_9123036.trn'WITH NORECOVERY RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_13_210001_3663138.trn'WITH NORECOVERY RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_14_000001_1605695.trn'WITH NORECOVERY RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_14_030001_7280782.trn'WITH NORECOVERY ……………… RESTORE LOG OLTP1121 FROM DISK ='D:\share\OLTP_backup_2025_11_17_180001_1343952.trn'WITH NORECOVERY

结果在OLTP_backup_2025_11_17_180001_1343952文件位置报错

Processed 0 pagesfordatabase'OLTP_1121',file'OLTP'onfile1. Processed 10388 pagesfordatabase'OLTP1121',file'OLTP_log'onfile1. Msg 9004, Level 16, State 3, Line 1 An error occurredwhileprocessing the logfordatabase'OLTP_1121'. If possible, restore from backup. If a backup is not available, it might be necessary to rebuild the log. Msg 3013, Level 16, State 1, Line 1 RESTORE LOG is terminating abnormally. Completiontime: 2025-11-21T13:41:54.2352031+08:00

通过图形化界面进行事务日志恢复也报错

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基于这样的情况,数据库层面的正常恢复途径只能恢复到11月17日18时左右数据,因为后面的日志发生了损坏,无法继续正常恢复,对于这种情况,我们这边使用日志解析工具对剩余事务日志备份进行解析,生成.sql文件

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然后客户把解析出来的.sql文件依次在会到11月17日18时的库上面去执行,这样顺利吧客户整体数据库恢复到最新状态,完成本次恢复任务(注意后续可能一些类似序列值需要调整)