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This is the comment you were replying to, attached to the article Introduction BackupPC part 1:

#4 Re: Introduction BackupPC part 1 Posted by Anonymous (136.173.xx.xx) on Thu 27 Mar 2008 at 15:24 Hi ! Thanks for the article ! I have to insist on major BackupPC features, which makes it unique: - BackupPC is disk based backup and not tape based. - It can use smb, ssh, rsync, etc to backup clients, so no client agent has to be installed. - It has a nice web interface. - It has a clever pooling scheme which minimizes disk storage and disk I/O. Identical files across multiple backups of the same or different PC are stored only once resulting in substantial savings in disk storage and disk writes. Also known as "data deduplication". This "data deduplication" is very interesting and only possible on disk based backups: If you backup 200 Windows PCs, only a single copy of the system will be on the backup disk (e.g. not 2x200GB=400GB but only 2GB + compression). It's as if BackupPC only stored the differences, so that you can also have a very long backup retention policy without needing lots of disks. A must try ! Ludovic (BackupPC Debian package maintainer :-)

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