Awesome

BlobSnap

BlobSnap is a snapshot-based backup system built on top of BlobStash, designed to provide "time machine" like features.

Features

Content addressed (with BLAKE2b as hashing algorithm), files are split into blobs, and retrieved by hash, blobs are deduplicated (incremental backups by default).
Read-only FUSE file system to navigate backups/snapshots.
Take snapshot automatically every x minutes, using a separate client-side scheduler (provides Arq/time machine like backup).
Possibility to incrementally archive blobs to AWS Glacier (see BlobStash docs).
Support for backing-up multiple hosts (you can force a different host to split backups into "different buckets").

Draws inspiration from Camlistore and bup (files are split into multiple blobs using a rolling checksum).

Components

Fuse file system

The (read-only) Fuse file system is the most convenient way to restore/navigate snapshots.

There is two magic directories at the root:

latest: it contains the latest version of every snapshots/backups.
snapshots: it let you navigate for every snapshots, you can see every versions.

$ blobsnap mount /backups
2014/05/12 17:26:34 Mounting read-only filesystem on /backups
Ctrl+C to unmount.

$ ls /backups
tomt0m
$ ls /backups/tomt0m
latest  snapshots
$ ls /backups/tomt0m/latest
writing
$ ls /backups/tomt0m/latest/writing
file1  file2  file3
$ ls /backups/tomt0m/snapshots/writing
2014-05-11T11:01:07+02:00  2014-05-11T18:36:06+02:00  2014-05-12T17:25:47+02:00
$ ls /backups/tomt0m/snapshots/writing/2014-05-11T18:36:06+02:00/writing
file1  file2  file3

Command-line client

blobsnap is the command-line client to perform/restore snapshots/backups.

$ blobsnap put /path/to/dir/or/file

Backup scheduler

The backup scheduler allows you to perform snapshots on a given basis.

The spec expect a cron-like spec, or a custom spec supported by http://godoc.org/github.com/robfig/cron.

The scheduler support a special anacron-like mode, designed for laptop users.

{
    "anacron_mode": false,
    "snapshots": [
        {
            "path": "/path/to/backup",
            "spec": "0 30 * * * *"
        },
        {
            "path": "/path/to/another/backup",
            "spec": "@every 12h"
        }
    ]
}

$ blobsnap sched