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Oracle10g Grid Computing with RAC
Chapter 17 -
Oracle’s Grid Integration Technologies

Data Pump Export

CONTENT – This specifies what export unloads.  The default value is ALL, which is equivalent to the old export utility’s ROWS=Y.  This option allows unloading of both data and metadata.  If the option is set to METADATA (equivalent to ROWS=N in the old export utility), only object definitions will be exported.  Now, you can also specify data_only to unload table row data only without unloading database object definitions.

DIRECTORY – Unlike the previous export utility, you must specify a default database directory in which to place dump file set and log file before you perform any export or import operation.  Failure to create a directory before performing an export will result in an error (see the example below):

$ /dba/oracle/admin/grid/pfile :) expdp
Export: Release - 64bit Beta on Sun Sep 14 17:09:00 2003
(c) Copyright 2002 Oracle Corporation. All rights reserved.
Username: oracle
Connected to: Oracle10i Enterprise Edition Release - 64bit Beta
With the Partitioning, OLAP and Oracle Data Mining options
ORA-39002: invalid operation
ORA-39070: Unable to open the log file.
ORA-39087: directory name DPUMP_DIR is invalid

Here are the two steps you must take to prepare the directory:

Grant “create any directory” privilege to  the export/import administrator.
SQL> grant create any directory to dliu;

Grant succeeded.

Create a directory for dump file set and log file.
SQL> create directory dpump_dir as '/dba/export/grid';

Directory created.

For more information, see the book Oracle 11g Grid and Real Application Clusters 30% off if you buy it directly from Rampant TechPress . 

Written by top Oracle experts, this RAC book has a complete online code depot with ready to use RAC scripts.

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