Checked for relevance on 14-May-2009"

PURPOSE
-------

To further document a known DataPump restriction.


SCOPE & APPLICATION
-------------------

This applies to Database Administrators who have traditionally used UNIX 
named pipes with the original Export and Import to 'compress', 'gzip' or 
'split' Export dump files.


DATAPUMP EXPORT/IMPORT DOES NOT WORK WITH UNIX NAMED PIPES
----------------------------------------------------------


EXPLANATION
-----------

Since Datapump Export is optimized to work from within the server, 
the export dumpfile information is no longer processed in a sequential 
manner. As a result, sequential media, such as tapes and pipes, are 
no longer supported with Export DataPump (expdp) and Import DataPump (impdp).

For details, see the manual "Oracle Database Utilities 10g Release 1 (10.1)",
Part 1 "Oracle Data Pump", Chapter 1 "Overview of Oracle Data Pump", section
"Original Export and Import Versus Data Pump Export and Import".


RELATED DOCUMENTS
-----------------

Part No. B10825-01:  "Oracle Database Utilities 10g Release 1 (10.1)"
(available on the Documentation CD)

Note 463336.1 Is it possible to use EXPDP directly with GZIP?