昨晚，为一个客户的数据库做了一次临时性的备份留存，数据库的整体容量大约在1.5T左右,一般中低端存储：
SQL*Plus: Release 10.2.0.2.0 - Production on Thu Sep 10 14:27:39 2009
Copyright (c) 1982, 2005, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP and Data Mining options
SQL> select sum(bytes)/1024/1024/1024 GB from v$datafile;
GB
----------
1527.83266
Linux 系统，整个备份过程大约持续了5个小时左右，备份出来的容量如下：
[oracle@sms backup]$ du -sk
1448023700 .
备份脚本：
run{
allocate channel d1 type disk maxpiecesize=50G;
allocate channel d2 type disk maxpiecesize=50G;
backup full database filesperset 10 include current controlfile format '/backup/fullbak_%d_%T_%s_%p'
plus archivelog format '/backup/archbak_%d_%T_%s' delete all input;
release channel d1;
release channel d2;
}
备份自9:30开始：
Recovery Manager: Release 10.2.0.2.0 - Production on Wed Sep 9 21:30:23 2009
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: ORADB (DBID=2409970687)
RMAN> run{
2> allocate channel d1 type disk maxpiecesize=50G;
3> allocate channel d2 type disk maxpiecesize=50G;
4> backup full database filesperset 10 include current controlfile format '/backup/fullbak_%d_%T_%s_%p'
5> plus archivelog format '/backup/archbak_%d_%T_%s' delete all input;
6> release channel d1;
7> release channel d2;
8> }
9>
using target database control file instead of recovery catalog
allocated channel: d1
channel d1: sid=819 instance=oradb1 devtype=DISK
allocated channel: d2
channel d2: sid=799 instance=oradb1 devtype=DISK
Starting backup at 09-SEP-09
current log archived
channel d1: starting archive log backupset
channel d1: specifying archive log(s) in backup set
input archive log thread=1 sequence=39695 recid=82786 stamp=697023074
input archive log thread=1 sequence=39696 recid=82789 stamp=697024187
结束时间是 Sep 10 02:43,五个小时左右。