oracle - 备份 Oracle db 出现错误

Question

这是我备份数据库的命令：

RMAN> backup as backupset database plus archivelog;

这是我得到的错误：

Starting backup at 18-APR-17
ORACLE error from target database:
ORA-00258: manual archiving in NOARCHIVELOG mode must identify log

using channel ORA_DISK_1
specification does not match any archived log in the repository
backup cancelled because there are no files to backup
Finished backup at 18-APR-17

Starting backup at 18-APR-17
using channel ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup plus archivelog command at 04/18/2017 11:59:03
RMAN-06149: cannot BACKUP DATABASE in NOARCHIVELOG mode

我对 Oracle 很陌生，所以我自己无法解决这个问题。你能告诉我如何解决这个问题吗？谢谢。

Answer 1

您无法备份归档日志，因为您处于“NOARCHIVELOG”模式。当您的数据库处于 NOARCHIVELOG 模式时，使用 RMAN 备份它的唯一方法是关闭它并执行冷备份。

如果要将数据库置于归档日志模式，作为 DBA 从 sqlplus 命令提示符：

shutdown immediate;
startup mount;
alter database archivelog;
alter database open;