The big difference is that you mentioned 'tar' with your FTP. CP is probably copying a ton of files, FTP only one.
Whenever any of these transfer methods get a new file name, there is significant overhead. It's often quicker for us to tar, FTP or SFTP or CP or RSYNC, then untar on the other end than just the individual file copy. == John == > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of David McSpadden > Sent: Friday, January 9, 2015 4:44 AM > To: [email protected] > Subject: RE: [NTSysADM] RE: OT unix commands? > > Yes, very good tips. > Thank you all. > This helps me. > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Kurt Buff > Sent: Friday, January 09, 2015 1:02 AM > To: [email protected] > Subject: Re: [NTSysADM] RE: OT unix commands? > > Good tips. > > Kurt > > On Thu, Jan 8, 2015 at 2:08 PM, Edward Berner <[email protected]> > wrote: > > “cp” or “scp”? > > > > > > > > If ”scp”, then you might increase performance a bit by selecting a > > different cipher, such as blowfish, using the “-c” option, and/or > > enabling compression with the “-C” option. But I’d guess that the > > real problem is the size of the SSH receive window on the destination > > host, and I think the only fix is to update the ssh software. > > > > > > > > Here are a couple links with more information about the ssh receive > > window > > issue: > > > > > > > > High Performance SSH/SCP - HPN-SSH > > > > http://www.psc.edu/index.php/hpn-ssh > > > > > > > > SSH, SCP, and SFTP Speed Improvements > > > > http://docs.oracle.com/cd/E26505_01/html/E27003/gmdlh.html > > > > > > > > -- > > > > Edward > > > > > > > > > > > > From: [email protected] > > [mailto:[email protected]] > > On Behalf Of David McSpadden > > Sent: Thursday, January 08, 2015 9:49 AM > > To: '[email protected]' > > Subject: [NTSysADM] OT unix commands? > > > > > > > > When running a ‘cp’ from one lan to another over a 100MB circuit my > > bandwidth utilization is 3MB but when running a ‘ftp’ to the same > > destination I utilize over10MB of the same circuit? > > > > Why would an IBM AIX cp command be so different from an IBM AIX ftp > > command as far as same files to the same locations over the same > networks?? > > > > Doesn’t really make any sense to me?? > > > > > > > This e-mail and any files transmitted with it are property of Indiana Members > Credit Union, are confidential, and are intended solely for the use of the > individual or entity to whom this e-mail is addressed. If you are not one of > the named recipient(s) or otherwise have reason to believe that you have > received this message in error, please notify the sender and delete this > message immediately from your computer. Any other use, retention, > dissemination, forwarding, printing, or copying of this email is strictly > prohibited. > > Please consider the environment before printing this email.
