From owner-freebsd-hackers Sun Jun 30 07:03:08 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id HAA13837 for hackers-outgoing; Sun, 30 Jun 1996 07:03:08 -0700 (PDT) Received: from pdx1 (pdx1.world.net [192.243.32.18]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id HAA13831 for ; Sun, 30 Jun 1996 07:03:05 -0700 (PDT) Received: from suburbia.net (suburbia.net [203.4.184.1]) by pdx1 (8.6.9/8.6.9) with ESMTP id HAA00809 for ; Sun, 30 Jun 1996 07:04:03 -0700 Received: (proff@localhost) by suburbia.net (8.7.4/Proff-950810) id AAA14509 for freebsd-hackers@freebsd.org; Mon, 1 Jul 1996 00:01:57 +1000 From: Julian Assange Message-Id: <199606301401.AAA14509@suburbia.net> Subject: rsync To: freebsd-hackers@freebsd.org Date: Mon, 1 Jul 1996 00:01:56 +1000 (EST) X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk The below looks like a phenominally useful replacement for sup. According to the tech report, total uncompressed transfer between two kernel trees was around half the size of the *diffs*. It also streams data in both directions, effectively removing rtt as an important consideration. WHAT IS RSYNC? -------------- rsync is a replacement for rcp that has many more features. rsyns uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand. At first glance this may seem impossible because the calculation of diffs between two files normally requires local access to both files. A technical report describing the rsync algorithm is included with this package. USAGE ----- Basically you use rsync just like rcp, but rsync has many additional options. Here is a brief description of available options: -v, --verbose increase verbosity -c, --checksum always checksum -a, --archive archive mode (same as -rlptDog) -r, --recursive recurse into directories -b, --backup make backups (default ~ extension) -u, --update update only (don't overwrite newer files) -l, --links preserve soft links -H, --hard-links preserve hard links -p, --perms preserve permissions -o, --owner preserve owner (root only) -g, --group preserve group -D, --devices preserve devices (root only) -t, --times preserve times -S, --sparse handle sparse files efficiently -n, --dry-run show what would have been transferred -x, --one-file-system don't cross filesystem boundaries -B, --block-size SIZE checksum blocking size -e, --rsh COMMAND specify rsh replacement --rsync-path PATH specify path to rsync on the remote machine -C, --cvs-exclude auto ignore files in the same way CVS does --delete delete files that don't exist on the sending side -I, --ignore-times don't exclude files that match length and time --exclude FILE exclude file FILE --exclude-from FILE exclude files listed in FILE --suffix SUFFIX override backup suffix --csum-length LENGTH set the checksum length --version print version number SETUP ----- Rsync uses rsh or ssh for communication. It does not need to be setuid and requires no special privilages for installation. It does not require a inetd entry or a daemon. You must, however, have a working rsh or ssh system. Using ssh is recommended for its security and compression features. To install rsync, first run the "configure" script. This will create a Makefile and config.h appropriate for your system. Then type "make". Once built put a copy of rsync in your search path on the local and remote systems (or use "make install"). That's it! COPYRIGHT --------- Rsync was written by Andrew Tridgell and Paul Mackerras, and is available under the GPL. Andrew.Tridgell@anu.edu.au paulus@cs.anu.edu.au AVAILABILITY ------------ The main ftp site for rsync is ftp://samba.anu.edu.au/pub/rsync -- "Of all tyrannies a tyranny sincerely exercised for the good of its victims may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies, The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for own good will torment us without end, for they do so with the approval of their own conscience." - C.S. Lewis, _God in the Dock_ +---------------------+--------------------+----------------------------------+ |Julian Assange RSO | PO Box 2031 BARKER | Secret Analytic Guy Union | |proff@suburbia.net | VIC 3122 AUSTRALIA | finger for PGP key hash ID = | |proff@gnu.ai.mit.edu | FAX +61-3-98199066 | 0619737CCC143F6DEA73E27378933690 | +---------------------+--------------------+----------------------------------+