Datapump REUSE_DUMPFILES parameter

REUSE_DUMPFILES parameter is using for overwriting preexisting dump file.

It  default parameter is NO.

Data Pump Export will return an error if you specify a dump file name that already exists. The REUSE_DUMPFILES parameter allows you to override that behavior and reuse a dump file name.

This is compatabile for Oracle 11g Version, Not in Oracle 10g version.

see below Example :

C:\Users\mazar>expdp scott/tiger@azardb dumpfile=reusedump.dmp directory=data_pump_dir

Export: Release 11.2.0.1.0 - Production on Sat Dec 11 12:17:12 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SCOTT"."SYS_EXPORT_SCHEMA_01":  scott/********@azardb dumpfile=reusedump.dmp directory=data_pump_dir
Estimate in progress using BLOCKS method...
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 256 KB
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/COMMENT
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/REF_CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
. . exported "SCOTT"."DEPT"                              5.945 KB       4 rows
. . exported "SCOTT"."EMP"                               8.578 KB      14 rows
. . exported "SCOTT"."MYTEST"                            5.429 KB       1 rows
. . exported "SCOTT"."SALGRADE"                          5.875 KB       5 rows
. . exported "SCOTT"."BONUS"                                 0 KB       0 rows
Master table "SCOTT"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded
******************************************************************************
Dump file set for SCOTT.SYS_EXPORT_SCHEMA_01 is:
  C:\APP\ORACLE\MAZAR\ADMIN\AZARDB\DPDUMP\REUSEDUMP.DMP
Job "SCOTT"."SYS_EXPORT_SCHEMA_01" successfully completed at 12:18:05

C:\Users\mazar>expdp scott/tiger@azardb dumpfile=reusedump.dmp directory=data_pump_dir

Export: Release 11.2.0.1.0 - Production on Sat Dec 11 12:18:17 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORA-39001: invalid argument value
ORA-39000: bad dump file specification
ORA-31641: unable to create dump file "C:\app\oracle\mazar\admin\azardb\dpdump\reusedump.dmp"
ORA-27038: created file already exists
OSD-04010: <create> option specified, file already exists

 

C:\Users\mazar>expdp scott/tiger@azardb dumpfile=reusedump.dmp directory=data_pump_dir reuse_dumpfiles=y

Export: Release 11.2.0.1.0 - Production on Sat Dec 11 12:18:31 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SCOTT"."SYS_EXPORT_SCHEMA_01":  scott/********@azardb dumpfile=reusedump.dmp directory=data_pump_dir reuse_dumpfiles=y
Estimate in progress using BLOCKS method...
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 256 KB
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/COMMENT
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/REF_CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
. . exported "SCOTT"."DEPT"                              5.945 KB       4 rows
. . exported "SCOTT"."EMP"                               8.578 KB      14 rows
. . exported "SCOTT"."MYTEST"                            5.429 KB       1 rows
. . exported "SCOTT"."SALGRADE"                          5.875 KB       5 rows
. . exported "SCOTT"."BONUS"                                 0 KB       0 rows
Master table "SCOTT"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded
******************************************************************************
Dump file set for SCOTT.SYS_EXPORT_SCHEMA_01 is:
  C:\APP\ORACLE\MAZAR\ADMIN\AZARDB\DPDUMP\REUSEDUMP.DMP
Job "SCOTT"."SYS_EXPORT_SCHEMA_01" successfully completed at 12:19:10

Ref :

http://download.oracle.com/docs/cd/E11882_01/server.112/e16536/dp_export.htm