If the date and timestamps on the two sets of files match, rsync will not transfer any data. This can (and does) tremendously speed up the process of making sure the two copies are the same. If there is ever some sort of issue, you may want to make one special run using the -c switch to force the checking of md5sums, even if the dates and times match.
I use rsync to backup a lot of stuff, and it saves me a lot of time, I/O, and bandwidth. Mark Post -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of McKown, John Sent: Thursday, April 28, 2005 4:42 PM To: [email protected] Subject: Which is better "cp -av src dest" or "rsync -a src dest"? Assuming that I want to do "incremental" backups from one filesystem to another on a nightly basis, which is better (started by cron) cp -axv src dest or rsync -axv src dest or is there really no difference? I don't want to use the daemon, nor do I want to backup on a different server. -- John McKown Senior Systems Programmer UICI Insurance Center Information Technology This message (including any attachments) contains confidential information intended for a specific individual and purpose, and its' content is protected by law. If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this transmission, or taking any action based on it, is strictly prohibited. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
