今天查数据文件、控制文件、spfile的备份都是从6.8开始的，归档日志却是5.28开始，这个是什么原因了

要看你rman脚本中 delete archivelog 的方式，贴出来看看

备份脚本是这样的

rman log='/u01/app/oracle/back/db_rman.log' append <

connect target /;

RUN {

CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;

CONFIGURE CONTROLFILE AUTOBACKUP ON;

CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '+BACK/%F';

ALLOCATE CHANNEL CH1 DEVICE TYPE DISK FORMAT '+BACK/%U';

BACKUP incremental level=0 DATABASE SKIP INACCESSIBLE FILESPERSET 10 tag='level0' PLUS ARCHIVELOG FILESPERSET 20

DELETE ALL INPUT;

RELEASE CHANNEL CH1;

}

ALLOCATE CHANNEL FOR MAINTENANCE DEVICE TYPE DISK;

CROSSCHECK BACKUPSET;

DELETE NOPROMPT OBSOLETE;

没看到 delete archivelog 的内容啊

crosscheck archivelog all; 
delete expired archivelog all;

or

DELETE ARCHIVELOG ALL COMPLETED BEFORE ‘SYSDATE-7'; 

备份之后有个delete all input，不是有归档日志没删除，是归档日志的备份没被删掉，今天还有5.28的归档日志备份存在