Antonio da Silva Martins Junior wrote:
----- "Andreas Kuntzagk" andreas.kuntzagk@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.