Restore archivelog from ASM to filesystem

RMAN> run

2> {

3> set archivelog destination to ‘/tmp‘;

4> restore archivelog sequence 142 thread 2;

5> }

executing command: SET ARCHIVELOG DESTINATION

Starting restore at 2015-03-12 00:22:25

using channel ORA_DISK_1

archived log for thread 2 with sequence 142 is already on disk as file +FRA/rac/archivelog/2015_03_11/thread_2_seq_142.717.874033939

restore not done; all files read only, offline, or already restored

Finished restore at 2015-03-12 00:22:25

注，这里因为原本的归档日志还存在，导致restore archivelog到/tmp下失败。

如果log_archive_dest_1或log_archive_dest未设置，归档日志默认放到闪回区。如果要restore的归档日志在闪回区还存在的话，则无法restore。

手工去除后，restore到/tmp了

RMAN> delete archivelog sequence 142 thread 2;

RMAN> run

2> {

3> set archivelog destination to ‘/tmp‘;

4> restore archivelog sequence 142 thread 2;

5> }

[[email protected] ~]$ ll -ltar /tmp

total 48904

drwx------  2 root   root         4096 Sep 21 15:54 keyring-PiyxKA

。。。

-rw-r-----  1 oracle asmadmin 49039872 Mar 12 00:24 2_142_870389881.dbf