It seems in my Unix (SunOS 5.10) there is no -C option for scp Never know that option before :-) Yu "Denis" Sun Oracle DBA ________________________________ From: Mark W. Farnham <mwf@xxxxxxxx> To: denis.sun@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx Sent: Thu, February 25, 2010 11:31:43 AM Subject: RE: ** ssh to copy/ftp files with compress Is that comparison with or without the –C flag on scp? ________________________________ From:oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Denis Sent: Wednesday, February 24, 2010 11:27 PM To: oracle-l@xxxxxxxxxxxxx Subject: Re: ** ssh to copy/ftp files with compress I usually find the following (executed at the target server) is able to transfer a file much faster than directly scp. However, gzip will consume some CPU. ssh2 source_server 'cat ${FNAME}| gzip -c' | gunzip -c > ${FILELOC}/${FNAME}