ZBackup – versatile deduplicating backup tool

Last Updated on July 13, 2021

ZBackup is a versatile globally-deduplicating backup tool, based on the ideas found in rsync.

Feed a large .tar into it, and it will store duplicate regions of it only once, then compress and optionally encrypt the result. Feed another .tar file, and it will also re-use any data found in any previous backups.

This way only new changes are stored, and as long as the files are not very different, the amount of storage required is very low.

Features include:

• Parallel LZMA or LZO compression of the stored data. You can mix LZMA and LZO in a repository.
• Built-in AES encryption of the stored data.
• Possibility to delete old backup data.
• Use of a 64-bit rolling hash, keeping the amount of soft collisions to zero.
• Repository consists of immutable files. No existing files are ever modified.
• Written in C++ only with only modest library dependencies.
• Safe to use in production.
• Possibility to exchange data between repos without recompression.
• Uses a 64-bit modified Rabin-Karp rolling hash.

Website: zbackup.org
Support: GitHub
Developer: Konstantin Isakov, Vladimir Stackov and contributors
License: GNU GPL v2

ZBackup is written in C++. Learn C++ with our recommended free books and free tutorials.

Return to Backup Home Page | Return to Deduplicating Encryption Backup Tools Home Page

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