User:Ng0/drafts/zpaq

zpaq is a incremental, journaling backup utility and archiver.

Emerge
Install :

app-arch/zpaq-extras
Emerging provides a set of additional compression profiles for zpaq:

Usage

 * zpaq add backup.zpaq /mnt/external/*

will only add the files whose last-modified date or size has changed since the previous backup.

A zpaq archive can contain at most 4 billion files and at most 250 terabytes of data after deduplication and before compression.

External resources

 * Official page