You are using the flash recovery area (fast recovery area in 11g Release 2) to store backup related files in your database. After regular monitoring of space usage in the Mash recovery area.
You realize that the flash recovery area is (jetting filled up very fast and it is running out of space.
Your database flash recovery area is low on specie and you have no more room on disk.
Proactively, which two options could you use to make more space available in the flash recovery
[Choose two]
A. Change the RMAN archived log deletion policy.
B. Use the RMAN CROSSCHECK command to reclaim the archived log space.
C. Change the RMAN retention policy to retain backups for a shorter period of time.
D. Use OS command to move files from the flash recovery area to some other location
您正在使用闪回恢复区（11g 第 2 版中的快速恢复区）在你的数据库中存储与备份相关的文件。在定期监测在糊状恢复区的空间使用情况之后。你会意识到，闪回恢复区被喷射似地非常快地填充起来且运行空间不足， 你的数据库闪回恢复区空间不足，你没有更多的空间在磁盘上。
你可以主动使用哪两个选项以在闪回恢复区上腾出更多可用空间
B. Use the RMAN CROSSCHECK command to reclaim the archived log space. 使用 RMAN 交叉
检查命令回收归档记录空间。 (自动)
D. Use OS command to move files from the flash recovery area to some other location 使用操作
系统命令将文件从闪回恢复区移动到其他位置
Use the CROSSCHECK command to synchronize the physical reality of backups and copies with their logical records in the RMAN repository.
The CROSSCHECK command does not delete the repository records of the files that it does notfind, but updates their repository records to EXPIRED. You can run DELETE EXPIRED to remove the repository records for expired files and any existing physical files whose status is EXPIRED.
使用 OS 命令来移动备份文件，再使用 CROSSCHECK 来检查物理与逻辑备份是否一致，如果出现 EXPIRED 状态，则通过 DELETE EXPIRED 删除过期的备份，即在物理磁盘上没有备份文件。这样就可以个 FRA 腾出更多的空间。