Antonio da Silva Martins Junior wrote: > ----- "Andreas Kuntzagk" <andreas.kuntzagk at mdc-berlin.de> escreveu: >>>> So to reduce load I'd like to have a script that: >>>> >>>> identifies changed files only (using md5?) >>>> copies them >>>> and compresses them >>>> >>> Well, I'm using "rsync --link-dest" to do this. This article >>> "http://www.rootprompt.org/article.php3?article=8976" had the >>> principle but didn't use "--link-dest". >> Well, but rsync doesn't compress, does it? >> So I would need to compress first and then rsync - meaning I need to >> keep the compressed files around twice. > > Well, rsync can "compress on the wire" (the data travels compressed), but > rsync will do the first two items: identifies changed files and copy them. > The compress to tape part will need to be done after that :) On the other > hand, with the prices of tapes and HD today, I had chose to buy two servers > with a lot of HD on each, put each one on a different building, and make a > backups on them. > Oh yeah. Since it is a Sun box too might as well run Solaris 10 or OpenSolaris and use zfs which comes with compression and snapshot capabilities among others.