Attic是一个deduplicating备份程序。Attic的主要目的是提供一种有效和安全的方式来备份数据。使用重复数据删除技术使得Attic适合日常备份，因为只存储有更改的部分。

易于使用

初始化备份库，并创建一个备份存档：

$ attic init /usbdrive/my-backup.attic  $ attic create -v /usbdrive/my-backup.attic::documents ~/Documents

主要特性：

Space efficient storage

Variable block size deduplication is used to reduce the number of bytes stored by detecting redundant data. Each file is split into a number of variable length chunks and only chunks that have never been seen before are compressed and added to the repository.

Optional data encryption

All data can be protected using 256-bit AES encryption and data integrity and authenticity is verified using HMAC-SHA256.

Off-site backups

Attic can store data on any remote host accessible over SSH. This is most efficient if Attic is also installed on the remote host.

Backups mountable as filesystems

Backup archives are mountable as userspace filesystems for easy backup verification and restores.

项目主页：http://www.open-open.com/lib/view/home/1416493633930