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在标准版中，做热备时系统报错：
Recovery Manager: Release 11.1.0.6.0 - Production on Mon Mar 8 23:00:19 2010 Copyright (c) 1982, 2007, Oracle. All rights reserved.
RMAN> connect catalog *
2> connect target *
3> run {
4> allocate channel t1 type disk;
5> allocate channel t2 type disk;
6> sql'alter system archive log current' ;
7> backup
8> DATABASE
9> format 'D:\oracle\expdata\PPM\%d_df_%f_%t_%s_%p';
10> #sql 'alter system archive log current' ;
11> #backup
12> #skip inaccessible
13> #filesperset 5
14> #format '%d_arc_%e_%t_%s_%p'
15> #archivelog all delete input;
16> release channel t1;
17> release channel t2;
18> }
19>
20>
connected to recovery catalog database
connected to target database: PPMD (DBID=4265181898)
allocated channel: t1
channel t1: SID=292 device type=DISK
RMAN-06908: WARNING: operation will not run in parallel on the allocated channels
RMAN-06909: WARNING: parallelism require Enterprise Edition
allocated channel: t2
channel t2: SID=301 device type=DISK
错误信息为：RMAN-06908 和RMAN-06909
提示为并行运行需要企业版。
把分配的channel从2个改为1个，不再出现错误。
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