Oracle RMAN备份删除几种常用方法总结

-- 连接到RMAN
rman target /

-- 删除所有备份集
DELETE BACKUP;

-- 删除所有归档日志备份
DELETE ARCHIVELOG ALL;

-- 或者一次性删除所有备份和归档日志
DELETE BACKUP DEVICE TYPE ALL;

-- 查看当前保留策略
SHOW RETENTION POLICY;

-- 删除已过期的备份（根据保留策略）
DELETE OBSOLETE;

-- 强制删除所有过期备份
DELETE OBSOLETE DEVICE TYPE ALL;

-- 删除数据文件备份
DELETE BACKUP OF DATABASE;

-- 删除控制文件备份
DELETE BACKUP OF CONTROLFILE;

-- 删除spfile备份
DELETE BACKUP OF SPFILE;

-- 删除指定设备的备份
DELETE BACKUP DEVICE TYPE DISK;  -- 磁盘备份
DELETE BACKUP DEVICE TYPE SBT;   -- 磁带备份

-- 删除所有备份集和镜像副本
DELETE BACKUP DEVICE TYPE ALL;
DELETE COPY DEVICE TYPE ALL;

-- 删除所有归档日志备份和副本
DELETE ARCHIVELOG ALL BACKED UP 1 TIMES TO DEVICE TYPE DISK;

-- 不提示确认，直接删除
DELETE NOPROMPT BACKUP;
DELETE NOPROMPT ARCHIVELOG ALL;
DELETE NOPROMPT OBSOLETE;

#!/bin/bash
# 删除所有RMAN备份的脚本

export ORACLE_SID=your_sid
export ORACLE_HOME=/u01/app/oracle/product/19.0.0/dbhome_1

rman target / << EOF
RUN {
    # 交叉检查备份
    CROSSCHECK BACKUP;
    CROSSCHECK ARCHIVELOG ALL;
    
    # 删除所有过期备份
    DELETE EXPIRED BACKUP;
    DELETE EXPIRED ARCHIVELOG ALL;
    
    # 删除所有备份
    DELETE NOPROMPT BACKUP;
    DELETE NOPROMPT ARCHIVELOG ALL;
    
    # 删除所有镜像副本
    DELETE NOPROMPT COPY;
}
EXIT;
EOF

-- 查看是否还有备份存在
LIST BACKUP SUMMARY;
LIST ARCHIVELOG ALL;
LIST COPY;

-- 查看恢复区域使用情况
SELECT * FROM V$RECOVERY_FILE_DEST;

-- 安全的删除步骤
1. 首先交叉检查备份
   CROSSCHECK BACKUP;
   
2. 标记过期备份
   DELETE EXPIRED BACKUP;
   
3. 根据保留策略删除陈旧备份
   DELETE OBSOLETE;
   
4. 最后再考虑删除所有备份
   DELETE BACKUP;