eXdupe is a fast file archiver that supports deduplication and differential backups.
It's easy to use. Let's backup the entire D drive on Windows:
exdupe d:\ d.full
Each day we can then create a new backup that only stores the changes compared to the initial backup:
exdupe -D d:\ d.full d1.diff
exdupe -D d:\ d.full d2.diff
It finds identical data blocks of 4 KB at byte grannularity positions across terabytes. Example of a backup of a Windows and a Linux virtual machine of 57,776 MB in total:
| exdupe 1.1.0 | zpaq64 | 7-Zip-flzma2 | restic | tar+zstd | |
|---|---|---|---|---|---|
| Size | 28,005 MB | 29,633 MB | 32,331 MB | 33,518 MB | 35,982 MB |
| Time | 24 s | 366 s | 562 s | 72 s | 35 s |
| Options | -g1 -t10 | -m1 -t12 | fastest | default | -1 -T0 |
Try the latest development version (backwards compatibility broken often!) that doubles the speed and improves compression ratio: Windows and Linux amd64.
Or get the latest stable version.
