Le 03/06/2011 14:54, Andrew Schulman a écrit : >> I'm about to set up a remote backup server to backup images of virtual >> machines. >> >> What would the data transfer be (after the intial "sneakernet" transfer) >> when a remote image gets updated/changed? Filename would not change, but >> contents and maybe size would. > > An entire new copy of that day's VM disk image will be created each day. > BackupPC doesn't compute or store diffs, if that's what you were thinking. > All it can do is store a new copy of the entire disk image, if even one > byte has changed in it. > > This is likely to be infeasible unless you have a very large amount of > storage and transfer bandwidth. When I set up BackupPC I quickly realized > that the daily VM images were going to consume all of my backup storage in > a very short time, so I added rules to exclude all of them.
The VM disk image are a binary file, they should be treated with a binary diff tool like xdelta. But I do not know if it's integrated into backuppc... ? Regards. ------------------------------------------------------------------------------ Simplify data backup and recovery for your virtual environment with vRanger. Installation's a snap, and flexible recovery options mean your data is safe, secure and there when you need it. Discover what all the cheering's about. Get your free trial download today. http://p.sf.net/sfu/quest-dev2dev2 _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
