I took a quick truss against the expdp's background process and it showed many kaio() and pwrite() calls... Tanel. _____ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Mark W. Farnham Sent: Thursday, January 11, 2007 12:44 To: tanel.poder.003@xxxxxxx; rjamya@xxxxxxxxx Cc: mark.powell@xxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: RE: Data Pump and compress on the fly in Unix Valid point - is that the behavior?