> -----Original Message----- > From: Sam Varshavchik > Sent: Thursday, December 02, 2004 4:43 PM
> >> Or is there another backup method I should be using? > > > > [Mitch says:] You can also tar / gzip or bzip BEFORE you back up - > > makes rsync a lot less efficient - but so does windows ;-) > > If it's all > > you got, that's your best option - another option is to buy > > a second > > hard disk for the *nix box and use it for your backups. > > I think if you intelligently tar things up, WITHOUT gzipping, > rsync should work well -- it should be able to optimize its > way past the unchanged, unencrypted, messages in the tar file. > > The trick is to make sure that the files always get tarred up > in the same order. Actually, I think that cpio would work > better, since cpio takes the filename list on standard input, > which can be sorted. I'd use this: cd destdir; rsh soucehost -c \ "cd ~user; touch .Maildir_newdate; \ find Maildir -newer .Maildir_Date -type f -print | cpio -ocB" \ | pax -r -s '/:/~/g'; rsh sourcehost -c \ "cd ~user; mv .Maildir_newdate .Maildir_Date" You may need to do a "touch -t 197001020000 .Maildir_Date" on the source host to kick things off, and obviously the rsh may need messing with, but the basic idea is to use "find" and "-newer" to collect the files that have been modified more recently than the ".Maildir_date" file, stuff them into cpio, pipe the output across the net to "pax", and use pax's "-s" command to modify the file names as they come across (the argument to -s is an "ed" style substitution command), and then once all that is complete, update the ".Maildir_Date" file. (The touch... mv thing is necessary to cover files that arrive during the backup). Every ":" in every file name will be replaced with a "~". Going the other way requires that you don't mind if all "~" characters become ":", but that's up to you! Malc. ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
