ASM上的备份集如何转移到文件系统中

刚看到一个有关asm备份集的迁移的问题。特地整理了一下 方法有两个。 方法一：使用rman，rman是一个非常好的工具，不仅仅是备份的作用，如果你只用rman作备份的话，有些浪费了。 通过rman里的backup backupset可以达到用户的要求。 下面是演示过程。 先准备一个backupset。 这里我备份了单个的archivelog来做演示。 RMAN> backup archivelog sequence 83294; Starting backup at 06-MAY-10 using channel ORA_DISK_1 channel ORA_DISK_1: starting archive log backupset channel ORA_DISK_1: specifying archive log(s) in backup set input archive log thread=1 sequence=83294 recid=83294 stamp=718324431 channel ORA_DISK_1: starting piece 1 at 06-MAY-10 channel ORA_DISK_1: finished piece 1 at 06-MAY-10 piece handle=+DG1/soldb/backup/0dld1gpq_1_1_718324538_20100506 tag=TAG20100506T223536 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:02 Finished backup at 06-MAY-10 查看该backupset RMAN> list backup of archivelog sequence 83294; List of Backup Sets =================== BS Key Size Device Type Elapsed Time Completion Time ——- ———- ———– ———— ————— 8 97.50K DISK 00:00:01 06-MAY-10 BP Key: 3 Status: AVAILABLE Compressed: NO Tag: TAG20100506T223536 Piece Name: +DG1/soldb/backup/0dld1gpq_1_1_718324538_20100506 List of Archived Logs in backup set 8 Thrd Seq Low SCN Low Time Next SCN Next Time —- ——- ———- ——— ———- ——— 1 83294 3111066080 06-MAY-10 3111066263 06-MAY-10 下面我们使用rman把这个在asm里的备份集做到文件系统上使用 backup backupset就可以了 如下 RMAN> backup backupset 8 format ‘/export/home/oracle/1.dbf’; Starting backup at 06-MAY-10 using channel ORA_DISK_1 input backupset count=13 stamp=718324538 creation_time=06-MAY-10 channel ORA_DISK_1: starting piece 1 at 06-MAY-10 channel ORA_DISK_1: backup piece +DG1/soldb/backup/0dld1gpq_1_1_718324538_20100506 piece handle=/export/home/oracle/1.dbf comment=NONE channel ORA_DISK_1: finished piece 1 at 06-MAY-10 channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01 Finished backup at 06-MAY-10 下面到文件系统下查看 [oracle@solaris ~]pwd /export/home/oracle [oracle@solaris ~]ls -al 1.dbf -rw-r—– 1 oracle oinstall 100352 May 6 22:40 1.dbf 可以看到backupset已经在文件系统了，这里只有100K，这是我手工archive的一个日志，拿来做实验用的，没必要写满。 除了使用rman，我们还可以使用dbms_file_transfer这个包的copy_file来实现同样的过程，下面看看这个过程 先建立directory SQL> create directory sourcedir as ‘+DG1/soldb/backup/’; Directory created SQL> create directory destdir as ‘/export/home/oracle/’;/0dld1gpq_1_1_718324538_20100506 Directory created SQL> exec dbms_file_transfer.copy_file(’sourcedir’, ‘0dld1gpq_1_1_718324538_20100506′, ‘destdir’, ‘2.dbf’); PL/SQL procedure successfully completed 这样我们已经完成了我们的目标了。 在目录下查看查看 [oracle@solaris ~]pwd /export/home/oracle [oracle@solaris ~]ls -al 2.dbf -rw-r—– 1 oracle oinstall 100352 May 6 22:45 2.dbf 这两种方法都可以达到目的，但是还是有差异的，毕竟前一种方法是用rman的，所以rman里留下了记录 List of Backup Sets =================== BS Key Size ——- ———- 8 97.50K List of Archived Logs in backup set 8 Thrd Seq Low SCN Low Time Next SCN Next Time —- ——- ———- ——— ———- ——— 1 83294 3111066080 06-MAY-10 3111066263 06-MAY-10 Backup Set Copy #2 of backup set 8 Device Type Elapsed Time Completion Time Compressed Tag ———– ———— ————— ———- — DISK 00:00:01 06-MAY-10 NO TAG20100506T223536 List of Backup Pieces for backup set 8 Copy #2 BP Key Pc# Status Piece Name ——- — ———– ———- 4 1 AVAILABLE /export/home/oracle/1.dbf Backup Set Copy #1 of backup set 8 Device Type Elapsed Time Completion Time Compressed Tag ———– ———— ————— ———- — DISK 00:00:01 06-MAY-10 NO TAG20100506T223536 List of Backup Pieces for backup set 8 Copy #1 BP Key Pc# Status Piece Name ——- — ———– ———- 3 1 AVAILABLE +DG1/soldb/backup/0dld1gpq_1_1_718324538_20100506 这里是没有第二个方法的记录的