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【DM版本】: 03134284294-20241009-244896-20119
【操作系统】：银河麒麟v10sp3
【CPU】:
【问题描述】*：已提交未归档的事务不能恢复

我每周1次 全量备份，每天一次增量备份， 每隔1小时做一次 归档日志备份，
在最后一次归档备份后，
按时间顺序， 事务A提交 -->切换日志 --> 事务B提交了， 但没有切换日志，
这时候如果宕机， 但备份齐全，归档日志也齐全， 恢复的话事务B丢失， 怎么才能实现恢复到宕机前的一刻？

备份演示如下：

create table T1 ( A char(200));  insert into T1 VALUES('1.before full backup'); COMMIT; ALTER system switch logfile;
BACKUP DATABASE FULL BACKUPSET '/bak/full' BACKUPINFO 'full';

insert into T1 VALUES('2.before inc1 backup'); COMMIT; ALTER system switch logfile;
BACKUP DATABASE INCREMENT WITH BACKUPDIR '/bak/full' BACKUPSET '/bak/inc1' BACKUPINFO 'inc1';

insert into T1 VALUES('6.before archlog backup'); COMMIT; ALTER system switch logfile;  
BACKUP ARCHIVELOG ALL NOT BACKED UP BACKUPSET '/bak/arch' BACKUPINFO 'arch';

insert into T1 VALUES('7.after archlog backup, before switch logfile'); COMMIT; alter system switch logfile;
insert into T1 VALUES('8.after archlog backup, after switch logfile'); COMMIT; 
insert into T1 VALUES('9.before crash'); 

异机恢复演示如下

RESTORE DATABASE '/dmdata/DAMENG/dm.ini' FROM BACKUPSET '/bak/full'; 
RESTORE DATABASE '/dmdata/DAMENG/dm.ini' FROM BACKUPSET '/bak/inc1' WITH BACKUPDIR '/bak/full'; 
RESTORE ARCHIVE LOG FROM BACKUPSET '/bak/arch' TO ARCHIVEDIR '/dmdata/arch' OVERWRITE 3;

源主机可用，比较归档日志，复制未备份归档日志到新环境 /dmdata/arch

RECOVER DATABASE '/dmdata/DAMENG/dm.ini' WITH ARCHIVEDIR '/dmdata/arch';

RECOVER DATABASE '/dmdata/DAMENG/dm.ini' UPDATE DB_MAGIC;

此时， 恢复后的数据库，只有 ‘7.after archlog backup, before switch logfile’
怎么恢复到已提交的 ‘8.after archlog backup, after switch logfile’
即使我把源环境的dameng01.log , dameng02.log 覆盖新环境的dameng01.log , dameng02.log ， 也不行。

信息