I'm working with remote backups of large files, and found a solution that can be used when the backup file is quite similar to the previous one.
I think that it could be used to send by rsync large backups of virtual disks. Basically, you have to: * gzip --rsyncable today_backup_file (very important to use --rsyncable) * rollcut -d 65536 today_backup_file.gzip * dupemerge backup_folder (deduplication using hardlinks) * use backuppc and rsync to remote backup your backup_folder Rollcut is a tool that I've done to cut similar large files, into several small chunks with a hig probability of some being equal. After using rollcut, you deduplicate all the small chunks, using hardlinks. So, every chunk that is the same of one of the previous ones, will be hardlinked locally. As rsync knows about hardlinks, after the first backup all the hardlinked chunks will not have to be send over the network. You can find more information, and download rollcut in https://github.com/ferfebles/rollcut ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ 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/
