这里将介绍如何从Redhat Linux 平台上将表空间cdzj,ldjc使用跨平台增量备份的传输表空间方法来迁移到Aix平台。在执行完初始化阶段后执行以下三个阶段来执行数据的迁移操作：
准备阶段
在准备阶段，要传输的表空间的数据文件会被传输到目标系统并被转换为目标系统所使用的字节序。在准备阶段应用程序是完全可以访问源数据的。准备阶段使用RMAN备份或dbms_file_transfer，后面将会详细介绍如何选择准备阶段所要使用的方法。
执行跨平台增量备份传输表空间的条件与建议
执行跨平台增量备份传输表空间的条件
在执行跨平台增量备份传输表空间之前需要检查是否满足以下条件:
.传输表空间的限制
.其它必须满足的条件
当前版本不支持windows
源数据库的compatible参数必须设置为10.2.0或更高版本
源数据库的compatible参数必须不能比目标数据库的compatible参数的值大
源数据库必须启用了archivelog模式
尽管首选目标系统是Linux操作系统（可以是64位的Oracle Linux或者是已经认证的Redhat Linux)，但这个过程也可以在其它Unix操作系统中执行。然而，对于任何non-Linux操作系统来说数据库的版本必须是11.2.0.4
源数据库的版本必须小于或等于目标数据库的版本
RMAN的缺省设备类型应该被配置为DISK
源数据库的RMAN不能对DEVICE TYPE DISK使用COMPRESSED配置。如果使用COMPRESSED配置，执行操作时可能会返回:ORA-19994: cross-platform backup of compressed backups different endianess.
源数据库中将要被迁移的表空间必须是online，并且不能包含脱机数据文件。表空间必须为read write状态。表空间为read only那么可以使用正常的XTTS方法进行迁移。
.所有步骤中执行操作的用户必须是Oracle用户并且它是OSDBA组的成员。操作系统审计被用来连接源数据库与目标数据库。
.如果准备阶段方法选择dbms_file_transfer，那么目标数据库版本必须至少为11.2.0.4。
.如果准备阶段方法选择RMAN，那么在源系统与目标系统中都要创建预备区域
.对于备库或快照备库是不支持这种操作的
.如果目标数据库版本是11.2.0.3或更低的版本，那么在目标系统中需要有一个11.2.0.4的数据库home目录来运行11.2.0.4的实例来执行增量备份的转换操作。如果目标数据库版本是11.2.0.3或更低版本，那么需要一个版本为11.2.0.4的单独的增量转换Home目录与实例。如果ASM使用11.2.0.4的转换Home，那么ASM的版本也必须是11.2.0.4，否则会触发ORA-15295(ORA-15295: ASM instance software version 11.2.0.3.0 less than client version 11.2.0.4.0)。
已知问题
1.如果源数据库包含使用键压缩的嵌套的IOTs表，那么在目标数据库home中必须安装修复Bug 14835322的补丁
2.如果想在创建增量备份时对源数据库使用块改变跟踪功能，那么需要在源数据库home中安装修复Bug 16850197的补丁
3.如果前滚阶段(xttdriver.pl -r)失败并显示以下错误信息，那么验证RMAN的DEVICE TYPE DISK不能使用COMPRESSED配置
Entering RollForward
After applySetDataFile
Done: applyDataFileTo
Done: RestoreSetPiece
DECLARE
*
ERROR at line 1:
ORA-19624: operation failed, retry possible
ORA-19870: error while restoring backup piece
/dbfs_direct/FS1/xtts/incrementals/xtts_incr_backup
ORA-19608: /dbfs_direct/FS1/xtts/incrementals/xtts_incr_backup is not a backup
piece
ORA-19837: invalid blocksize 0 in backup piece header
ORA-06512: at "SYS.X$DBMS_BACKUP_RESTORE", line 2338
ORA-06512: at line 40
[oracle@sjjh ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Tue Aug 15 17:10:58 2017
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select a.NAME,b.NAME from v$tablespace a,v$datafile b where a.TS#=b.TS# and a.NAME in('CDZJ','LDJC');
NAME NAME
------------------------------ --------------------------------------------------------------------------------
LDJC /home/app/oracle/product/11.2.0/dbs/ldjc01
CDZJ /home/app/oracle/product/11.2.0/dbs/cdzj01
SQL> create directory sourcedir as '/home/app/oracle/product/11.2.0/dbs';
Directory created.
IBMP740-2:/oracle11$sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Wed Aug 16 11:23:03 2017
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/oracle11/oradata/jycs/jycs/system01.dbf
/oracle11/oradata/jycs/jycs/sysaux01.dbf
/oracle11/oradata/jycs/jycs/undotbs01.dbf
/oracle11/oradata/jycs/jycs/users01.dbf
/oracle11/oradata/jycs/jycs/example01.dbf
SQL> create directory destdir as '/oracle11/oradata/jycs/jycs';
Directory created.
[oracle@sjjh ~]$ cd /home/xtts_script
[oracle@sjjh xtts_script]$ $ORACLE_HOME/perl/bin/perl xttdriver.pl -p
============================================================
trace file is /home/xtts_script/prepare_Aug16_Wed_15_50_19_497//Aug16_Wed_15_50_19_497_.log
=============================================================
--------------------------------------------------------------------
Parsing properties
--------------------------------------------------------------------
--------------------------------------------------------------------
Done parsing properties
--------------------------------------------------------------------
--------------------------------------------------------------------
Checking properties
--------------------------------------------------------------------
--------------------------------------------------------------------
Done checking properties
--------------------------------------------------------------------
--------------------------------------------------------------------
Starting prepare phase
--------------------------------------------------------------------
Prepare source for Tablespaces:
'CDZJ' /oracle11/xtts
xttpreparesrc.sql for 'CDZJ' started at Wed Aug 16 15:50:19 2017
xttpreparesrc.sql for ended at Wed Aug 16 15:50:19 2017
Prepare source for Tablespaces:
'LDJC' /oracle11/xtts
xttpreparesrc.sql for 'LDJC' started at Wed Aug 16 15:51:08 2017
xttpreparesrc.sql for ended at Wed Aug 16 15:51:08 2017
Prepare source for Tablespaces:
'''' /oracle11/xtts
xttpreparesrc.sql for '''' started at Wed Aug 16 15:52:05 2017
xttpreparesrc.sql for ended at Wed Aug 16 15:52:05 2017
Prepare source for Tablespaces:
'''' /oracle11/xtts
xttpreparesrc.sql for '''' started at Wed Aug 16 15:52:06 2017
xttpreparesrc.sql for ended at Wed Aug 16 15:52:06 2017
Prepare source for Tablespaces:
'''' /oracle11/xtts
xttpreparesrc.sql for '''' started at Wed Aug 16 15:52:07 2017
xttpreparesrc.sql for ended at Wed Aug 16 15:52:07 2017
--------------------------------------------------------------------
Done with prepare phase
--------------------------------------------------------------------
--------------------------------------------------------------------
Find list of datafiles in system
--------------------------------------------------------------------
--------------------------------------------------------------------
Done finding list of datafiles in system
--------------------------------------------------------------------
IBMP740-2:/oracle11/xtts$ftp 10.138.130.101
Connected to 10.138.130.101.
220 (vsFTPd 2.2.2)
Name (10.138.130.101:root): oracle
331 Please specify the password.
Password:
230 Login successful.
ftp> cd /home/dfcopydir
250 Directory successfully changed.
ftp> ls -lrt
200 PORT command successful. Consider using PASV.
150 Here comes the directory listing.
-rw-r----- 1 501 501 2147491840 Aug 16 07:50 CDZJ_7.tf
-rw-r----- 1 501 501 5368717312 Aug 16 07:52 LDJC_6.tf
226 Directory send OK.
ftp> lcd /oracle11/xtts
Local directory now /oracle11/xtts
ftp> bin
200 Switching to Binary mode.
ftp> get LDJC_6.tf
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for LDJC_6.tf (5368717312 bytes).
226 Transfer complete.
5368717312 bytes received in 45.68 seconds (1.148e+05 Kbytes/s)
local: LDJC_6.tf remote: LDJC_6.tf
ftp> get CDZJ_7.tf
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for CDZJ_7.tf (2147491840 bytes).
226 Transfer complete.
2147491840 bytes received in 18.52 seconds (1.132e+05 Kbytes/s)
local: CDZJ_7.tf remote: CDZJ_7.tf
IBMP740-2:/oracle11/xtts$ls -lrt
total 14680112
-rw-r--r-- 1 oracle11 oinstall 5368717312 Aug 16 16:53 LDJC_6.tf
-rw-r--r-- 1 oracle11 oinstall 2147491840 Aug 16 16:54 CDZJ_7.tf
IBMP740-2:/oracle11/xtts$ftp 10.138.130.101
Connected to 10.138.130.101.
220 (vsFTPd 2.2.2)
Name (10.138.130.101:root): oracle
331 Please specify the password.
Password:
230 Login successful.
ftp> cd /home/backup
250 Directory successfully changed.
ftp> ls -lrt
200 PORT command successful. Consider using PASV.
150 Here comes the directory listing.
-rw-r----- 1 501 501 122880 Aug 16 08:39 30sc2f2u_1_1
-rw-r----- 1 501 501 786432 Aug 16 08:40 31sc2f31_1_1
226 Directory send OK.
ftp> lcd /oracle11/xtts
Local directory now /oracle11/xtts
ftp> bin
200 Switching to Binary mode.
ftp> get 30sc2f2u_1_1
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for 30sc2f2u_1_1 (122880 bytes).
226 Transfer complete.
122880 bytes received in 0.001414 seconds (8.487e+04 Kbytes/s)
local: 30sc2f2u_1_1 remote: 30sc2f2u_1_1
ftp> get 31sc2f31_1_1
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for 31sc2f31_1_1 (786432 bytes).
226 Transfer complete.
786432 bytes received in 0.007007 seconds (1.096e+05 Kbytes/s)
local: 31sc2f31_1_1 remote: 31sc2f31_1_1
IBMP740-2:/oracle11/xtts$ls -lrt
total 1776
-rw-r--r-- 1 oracle11 oinstall 122880 Aug 16 17:37 30sc2f2u_1_1
-rw-r--r-- 1 oracle11 oinstall 786432 Aug 16 17:37 31sc2f31_1_1
Error:
------
The incremental backup was not taken as a datafile has been added to the tablespace:
Please Do the following:
--------------------------
1. Copy fixnewdf.txt from source to destination temp dir
2. Copy backups:
from to the in destination
3. On Destination, run $ORACLE_HOME/perl/bin/perl xttdriver.pl --fixnewdf
4. Re-execute the incremental backup in source:
$ORACLE_HOME/perl/bin/perl xttdriver.pl --bkpincr
NOTE: Before running incremental backup, delete FAILED in source temp dir or
run xttdriver.pl with -L option:
$ORACLE_HOME/perl/bin/perl xttdriver.pl -L --bkpincr
These instructions must be followed exactly as listed. The next incremental backup will include the new datafile.
SQL> create public database link ttslink
2 connect to system identified by "xxzx7817600"
3 using '(DESCRIPTION =
4 (ADDRESS_LIST =
5 (ADDRESS = (PROTOCOL = TCP)(HOST =10.138.130.101)(PORT = 1521))
6 )
7 (CONNECT_DATA =
8 (SERVER = DEDICATED)
9 (SERVICE_NAME =sjjh)
10 )
11 )';
Database link created.
创建dblink后验证是否可以能过dblink访问源数据库
SQL> select * from dual@ttslink;
D
-
X
在目标数据库中创建用户方案LDJC,CDZJ
SQL> create user ldjc identified by "ldjc";
User created.
SQL> grant dba,connect,resource to ldjc;
Grant succeeded.
SQL> create user cdzj identified by "cdzj";
User created.
SQL> grant dba,connect,resource to cdzj;
Grant succeeded.
IBMP740-2:/oracle11/xtts_script$impdp system/abcd directory=dump_dir logfile=tts_imp.log network_link=ttslink transport_full_check=no transport_tablespaces=CDZJ,LDJC transport_datafiles='/oracle11/oradata/jycs/jycs/CDZJ_7.dbf','/oracle11/oradata/jycs/jycs/LDJC_6.dbf'
Import: Release 11.2.0.4.0 - Production on Wed Aug 16 19:49:01 2017
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYSTEM"."SYS_IMPORT_TRANSPORTABLE_01": system/******** directory=dump_dir logfile=tts_imp.log network_link=ttslink transport_full_check=no transport_tablespaces=CDZJ,LDJC transport_datafiles=/oracle11/oradata/jycs/jycs/CDZJ_7.dbf,/oracle11/oradata/jycs/jycs/LDJC_6.dbf
Processing object type TRANSPORTABLE_EXPORT/PLUGTS_BLK
Processing object type TRANSPORTABLE_EXPORT/TABLE
Processing object type TRANSPORTABLE_EXPORT/INDEX/INDEX
Processing object type TRANSPORTABLE_EXPORT/CONSTRAINT/CONSTRAINT
Processing object type TRANSPORTABLE_EXPORT/INDEX_STATISTICS
Processing object type TRANSPORTABLE_EXPORT/COMMENT
Processing object type TRANSPORTABLE_EXPORT/CONSTRAINT/REF_CONSTRAINT
Processing object type TRANSPORTABLE_EXPORT/TABLE_STATISTICS
Processing object type TRANSPORTABLE_EXPORT/POST_INSTANCE/PLUGTS_BLK
Job "SYSTEM"."SYS_IMPORT_TRANSPORTABLE_01" successfully completed at Wed Aug 16 19:50:19 2017 elapsed 0 00:01:17
IBMP740-2:/home/oracle11$impdp system/abcd directory=dump_dir logfile=ysj.log schemas=ldjc,cdzj content=metadata_only exclude=table,index network_link=ttslink
Import: Release 11.2.0.4.0 - Production on Fri Aug 18 08:40:01 2017
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYSTEM"."SYS_IMPORT_SCHEMA_01": system/******** directory=dump_dir logfile=ysj.log schemas=ldjc,cdzj content=metadata_only exclude=table,index network_link=ttslink
Processing object type SCHEMA_EXPORT/USER
ORA-31684: Object type USER:"LDJC" already exists
ORA-31684: Object type USER:"CDZJ" already exists
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/SYNONYM/SYNONYM
Processing object type SCHEMA_EXPORT/TYPE/TYPE_SPEC
Processing object type SCHEMA_EXPORT/DB_LINK
Processing object type SCHEMA_EXPORT/SEQUENCE/SEQUENCE
Processing object type SCHEMA_EXPORT/PACKAGE/PACKAGE_SPEC
Processing object type SCHEMA_EXPORT/FUNCTION/FUNCTION
Processing object type SCHEMA_EXPORT/PACKAGE/COMPILE_PACKAGE/PACKAGE_SPEC/ALTER_PACKAGE_SPEC
Processing object type SCHEMA_EXPORT/FUNCTION/ALTER_FUNCTION
Processing object type SCHEMA_EXPORT/VIEW/VIEW
ORA-39082: Object type VIEW:"LDJC"."DB03" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AA10" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AA12" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AB01" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AB01H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AB01_LOG" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AB01_USER" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AB01_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AB01_WEB_NSLOG" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AB02" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AB02H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."AB02_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB01" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB01H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB01_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB02" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB02H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB02_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB03" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB03H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB03_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB04" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB04H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB04_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB05" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB05H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BB05_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BC02" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BC02H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BC02_LOG" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BD01_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BD02_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BD03_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BF01" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BF01H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ01" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ01H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ01_1" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ02" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ02H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ02_1" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ03" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ03H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ04" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ04H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ04_1" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ05" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ05H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ05_1" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ06" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ06H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ07" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ07H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ07_1" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ08" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ08H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ09" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ09H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ09_TEMP" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ10" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ10H" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ10_LOG" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."BZ11_WEB" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."OAE300_LOG" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."TEMP_AAB002" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."V_JCXT_AJGL_JABP" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."JCXT_AJGL_ZWNR" created with compilation warnings
ORA-39082: Object type VIEW:"LDJC"."V_JCXT_AJGL_LABP" created with compilation warnings
Processing object type SCHEMA_EXPORT/PACKAGE/PACKAGE_BODY
ORA-39082: Object type PACKAGE_BODY:"LDJC"."QUEST_SOO_PKG" created with compilation warnings
ORA-39082: Object type PACKAGE_BODY:"LDJC"."QUEST_SOO_SQLTRACE" created with compilation warnings
Processing object type SCHEMA_EXPORT/JOB
Processing object type SCHEMA_EXPORT/POST_SCHEMA/PROCOBJ
Job "SYSTEM"."SYS_IMPORT_SCHEMA_01" completed with 72 error(s) at Fri Aug 18 08:40:22 2017 elapsed 0 00:00:20
SQL> select * from ldjc.jy_test;
USER_ID
----------
1
2
3
SQL> select * from cdzj.jy_test;
USER_ID
----------
1
2
3
在元数据导入后，可以将源数据库中的表空间ldjc,cdzj修改为read write状态
SQL> alter tablespace ldjc read write;
Tablespace altered.
SQL> alter tablespace cdzj read write;
Tablespace altered.
dfcopydir:源系统中用来存储xttdriver.pl -p操作所生成的数据文件副本目录。这个目录要有足够的空间来存储所有被传输表空间的数据文件副本。这个目录可以是目标系统上通过NFS-mounted文件系统所挂载到源系统中的一个目录，在这种情况下，目标系统中的stageondest参数也引用这个相同的NFS目录。可以参考See Note 359515.1 for mount option guidelines。 这个参数只有使用RMAN备份生成数据文件副本时才使用，例如dfcopydir=/stage_source
stageondest:目标系统中存储从源系统中手动传输过来的数据文件副本。这个目录要有足够的空间来存储数据文件副本。这个目录同时也是用来存储从源系统传输过来的增量备份文件的目录。在目标系统上执行xttdriver.pl -c转换数据文件与执行xttdriver.pl -r前滚数据文件时会从这个目录中读取数据文件副本与增量备份文件。这个目标也可以是一个DBFS-mounted文件系统。个目录可以是源系统上通过NFS-mounted文件系统所挂载到目标系统中的一个目录，在这种情况下，源系统中的backupformat参数与dfcopydir参数就会引用这个相同的NFS目录。可以参考See Note 359515.1 for mount option guidelines。例如stageondest=/stage_dest