rman支持普通用户远程备份吗？

1）具备dba或者sysdba权限的用户就可以使用rman对数据库进行备份。
2）rman的backup database只能够本地备份，备份的路径设置在CONFIGURE DEFAULT DEVICE TYPE TO DISK;中；即，使用rman备份的路径是由rman的设备路径控制，用机器B rman 机器A，备份也是在机器A上的，不会再机器B上。
3）如果想在机器B上，可以使用copy的方式+auxiliary。
4）backup as copy是物理文件的复制，backup会扫描物理块，跳过空块。

测试记录如下：
rman target dbamonitor/dbamonitor_1@192.168.10.82:1521/ser_zyt
BACKUP DATABASE;
rman target dbamonitor/dbamonitor_1@192.168.10.82:1521/ser_zyt auxiliary sys/oracle@192.168.10.66:1521/test11g
BACKUP AS COPY DEVICE TYPE DISK DATABASE auxiliary format '/picclife/backup/%f';
backup as copy archivelog sequence 85 thread 2 auxiliary format '/picclife/backup/%U';

rman target dbamonitor/dbamonitor_1@192.168.10.82:1521/ser_zyt
RMAN> BACKUP DATABASE;
Starting backup at 17-NOV-21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=43 instance=zytrac2 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=+DATA/zytrac/datafile/system.256.1058372141
input datafile file number=00002 name=+DATA/zytrac/datafile/sysaux.266.1058372141
input datafile file number=00005 name=+DATA/zytrac/datafile/example.265.1058372261
input datafile file number=00003 name=+DATA/zytrac/datafile/undotbs1.257.1058372141
input datafile file number=00008 name=+DATA/zytrac/datafile/tbs_dbamonitor.276.1107907173
input datafile file number=00007 name=+DATA/zytrac/datafile/undotbs3.396.1060794123
input datafile file number=00006 name=+DATA/zytrac/datafile/undotbs2.269.1058372579
input datafile file number=00004 name=+DATA/zytrac/datafile/users.272.1058372141
channel ORA_DISK_1: starting piece 1 at 08-AUG-22
channel ORA_DISK_1: finished piece 1 at 08-AUG-22
piece handle=+DATA/zytrac/backupset/2022_08_08/nnndf0_tag20220808t203841_0.393.1112215121 tag=TAG20220808T203841 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:15
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 08-AUG-22
channel ORA_DISK_1: finished piece 1 at 08-AUG-22
piece handle=+DATA/zytrac/backupset/2022_08_08/ncsnf0_tag20220808t203841_0.288.1112215201 tag=TAG20220808T203841 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 17-NOV-21

RMAN> 
RMAN> 
RMAN> 
RMAN> 


rman target dbamonitor/dbamonitor_1@192.168.10.82:1521/ser_zyt auxiliary sys/oracle@192.168.10.66:1521/test11g
RMAN> BACKUP AS COPY DEVICE TYPE DISK DATABASE auxiliary format '/picclife/backup/%f';

Starting backup at 17-NOV-21
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00001 name=+DATA/zytrac/datafile/system.256.1058372141
output file name=/picclife/backup/1 tag=TAG20220808T205510
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:46
channel ORA_DISK_1: starting datafile copy
input datafile file number=00002 name=+DATA/zytrac/datafile/sysaux.266.1058372141
output file name=/picclife/backup/2 tag=TAG20220808T205510
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:35
channel ORA_DISK_1: starting datafile copy
input datafile file number=00005 name=+DATA/zytrac/datafile/example.265.1058372261
output file name=/picclife/backup/5 tag=TAG20220808T205510
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:25
channel ORA_DISK_1: starting datafile copy
input datafile file number=00003 name=+DATA/zytrac/datafile/undotbs1.257.1058372141
output file name=/picclife/backup/3 tag=TAG20220808T205510
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting datafile copy
input datafile file number=00008 name=+DATA/zytrac/datafile/tbs_dbamonitor.276.1107907173
output file name=/picclife/backup/8 tag=TAG20220808T205510
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting datafile copy
input datafile file number=00007 name=+DATA/zytrac/datafile/undotbs3.396.1060794123
output file name=/picclife/backup/7 tag=TAG20220808T205510
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
channel ORA_DISK_1: starting datafile copy
input datafile file number=00006 name=+DATA/zytrac/datafile/undotbs2.269.1058372579
output file name=/picclife/backup/6 tag=TAG20220808T205510
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
channel ORA_DISK_1: starting datafile copy
input datafile file number=00004 name=+DATA/zytrac/datafile/users.272.1058372141
output file name=/picclife/backup/4 tag=TAG20220808T205510
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
Finished backup at 17-NOV-21

RMAN> exit



RMAN> backup as copy archivelog sequence 85 thread 2 auxiliary format '/picclife/backup/%U';

Starting backup at 17-NOV-21
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log copy
input archived log thread=2 sequence=85 RECID=98 STAMP=1112217007
output file name=/picclife/backup/arch_D-ZYTRAC_id-3628924225_S-85_T-2_A-3628911678_1214m5kr RECID=0 STAMP=0
channel ORA_DISK_1: archived log copy complete, elapsed time: 00:00:03
Finished backup at 17-NOV-21

RMAN> 

参考：Oracle? Database Backup and Recovery User's Guide --> 9 Backing Up the Database