4 ms·
In this case, it accomplishes efficient backups.
by makeworld 3y ago
In this case, it accomplishes efficient backups.
- Hackbraten 3y agoWhat's efficient (or less efficient) about backing up two identical files vs. two different files with comparable sizes? If one has a backup scheme where files are stored in a content-adressable store, I can see the efficiency. But I have never heard of such a scheme in the context of backups. If one has a backup scheme with automatic deduplication over arbitrary byte ranges (such as ZFS's deduplication feature), I can see the efficiency. But I have never seen anyone enable that feature in the context of backups due to its massive RAM usage requirements.
- cesarb 3y ago> If one has a backup scheme where files are stored in a content-adressable store, I can see the efficiency. But I have never heard of such a scheme in the context of backups. One example of a system which does that is borgbackup. But even a simple "rsync with snapshots" benefits from identical files, since with common rsync options identical files are not transferred again (which means the data is kept shared between the snapshots).