Okay, this response is a bit delayed, so I'm including a recap: > > > > I'm using it to backup files from one computer to another, and it > > > > works exactly as I thought it would, except that it seems to be > > > > copying entire files over when they've change rather than the > > > > differences. > > > > > > What specifically leads you to that conclusion? > > > > I have it set to extra verbose, and I've been watching the files transfer > > over. When I append 2K to a 100MB text file and re-rsync, it's pretty > > obvious it's transferring 100MB, not 2K + whatever overhead the diff takes > > up. > > I wouldn't be so sure. Add the option --stats to the rsync command line > and see what it says. AFAIK those numbers are correct.
Today I did a very specific test and I'm positive it's behaving that way. Here's a transcript, sorry for the length: ------------------------------------------------------------------------------ JINX: /root# ls -l /home/sluggo/temp total 1904 -rw------- 1 sluggo wheel 1934600 Mar 17 19:49 asciifile JINX: /root# rsync -vvaRbS --backup-dir=/backups/rsync/old --delete \ --rsh=ssh --exclude="*.core" --exclude=/etc/namedb/secondary \ --exclude=/var/run --numeric-ids --stats --progress --bwlimit=100 \ /home/sluggo/temp remoteserver:/backups/rsync/current rsync: open connection using ssh remoteserver rsync --server -vvblogDtprRS --bwlimit=100 --delete --numeric-ids --backup-dir /backups/rsync/old . /backups/rsync/current rsync: building file list... rsync: expand file_list to 4000 bytes, did move rsync: 4 files to consider. expand file_list to 4000 bytes, did move deleting in home/sluggo/temp home is uptodate home/sluggo/temp/ /home/sluggo/temp/asciifile 131072 6% 76.13kB/s 0:00:23 524288 27% 76.18kB/s 0:00:18 1212416 62% 76.19kB/s 0:00:09 1605632 82% 76.18kB/s 0:00:04 1934600 100% 76.01kB/s 0:00:00 backup_dir is /backups/rsync/old total: matches=0 tag_hits=0 false_alarms=0 data=1934600 Number of files: 4 Number of files transferred: 1 Total file size: 1934608 bytes Total transferred file size: 1934600 bytes Literal data: 1934600 bytes Matched data: 0 bytes File list size: 103 Total bytes written: 1935042 Total bytes read: 36 wrote 1935042 bytes read 36 bytes 73021.81 bytes/sec total size is 1934608 speedup is 1.00 JINX: /root# echo "13 more chars" >> /home/sluggo/temp/asciifile JINX: /root# rsync -vvaRbS --backup-dir=/backups/rsync/old --delete \ --rsh=ssh --exclude="*.core" --exclude=/etc/namedb/secondary \ --exclude=/var/run --numeric-ids --stats --progress --bwlimit=100 \ /home/sluggo/temp remoteserver:/backups/rsync/current rsync: open connection using ssh remoteserver rsync --server -vvblogDtprRS --bwlimit=100 --delete --numeric-ids --backup-dir /backups/rsync/old . /backups/rsync/current rsync: building file list... rsync: expand file_list to 4000 bytes, did move rsync: 4 files to consider. expand file_list to 4000 bytes, did move deleting in home/sluggo/temp home is uptodate /home/sluggo/temp/asciifile 131072 6% 76.19kB/s 0:00:23 425984 22% 76.19kB/s 0:00:19 851968 44% 76.18kB/s 0:00:14 1376256 71% 76.19kB/s 0:00:07 1934614 100% 76.02kB/s 0:00:00 backup_dir is /backups/rsync/old keep_backup home/sluggo/temp/asciifile -> /backups/rsync/old/home/sluggo/temp/asciifile total: matches=0 tag_hits=0 false_alarms=0 data=1934614 Number of files: 4 Number of files transferred: 1 Total file size: 1934622 bytes Total transferred file size: 1934614 bytes Literal data: 1934614 bytes Matched data: 0 bytes File list size: 103 Total bytes written: 1935056 Total bytes read: 36 wrote 1935056 bytes read 36 bytes 70366.98 bytes/sec total size is 1934622 speedup is 1.00 -------------------------------------------------------------- Note the "Total bytes written". All I added was that one line at the end of the file. I also hit enter a couple times during the transfer so that snapshots of the timings would be logged; note that it took about the same amount of time both times. So unless I'm completely on drugs here, it seems to be transferring the entire file, not a diff. ------------------------------------------------------------------------------- Kim Scarborough http://www.unknown.nu/kim/ ------------------------------------------------------------------------------- "I was so naive as a kid, I used to sneak behind the barn and do nothing." -Johnny Carson ------------------------------------------------------------------------------- -- To unsubscribe or change options: http://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.tuxedo.org/~esr/faqs/smart-questions.html