mirror of https://github.com/borgbackup/borg.git
131 lines
4.6 KiB
ReStructuredText
131 lines
4.6 KiB
ReStructuredText
What is BorgBackup?
|
|
-------------------
|
|
BorgBackup (short: Borg) is a deduplicating backup program.
|
|
Optionally, it supports compression and authenticated encryption.
|
|
|
|
The main goal of Borg is to provide an efficient and secure way to backup data.
|
|
The data deduplication technique used makes Borg suitable for daily backups
|
|
since only changes are stored.
|
|
The authenticated encryption technique makes it suitable for backups to not
|
|
fully trusted targets.
|
|
|
|
`Borg Installation docs <http://borgbackup.github.io/borgbackup/installation.html>`_
|
|
|
|
|
|
Main features
|
|
~~~~~~~~~~~~~
|
|
**Space efficient storage**
|
|
Deduplication based on content-defined chunking is used to reduce the number
|
|
of bytes stored: each file is split into a number of variable length chunks
|
|
and only chunks that have never been seen before are added to the repository.
|
|
|
|
To deduplicate, all the chunks in the same repository are considered, no
|
|
matter whether they come from different machines, from previous backups,
|
|
from the same backup or even from the same single file.
|
|
|
|
Compared to other deduplication approaches, this method does NOT depend on:
|
|
|
|
* file/directory names staying the same
|
|
|
|
So you can move your stuff around without killing the deduplication,
|
|
even between machines sharing a repo.
|
|
|
|
* complete files or time stamps staying the same
|
|
|
|
If a big file changes a little, only a few new chunks will be stored -
|
|
this is great for VMs or raw disks.
|
|
|
|
* the absolute position of a data chunk inside a file
|
|
|
|
Stuff may get shifted and will still be found by the deduplication
|
|
algorithm.
|
|
|
|
**Speed**
|
|
* performance critical code (chunking, compression, encryption) is
|
|
implemented in C/Cython
|
|
* local caching of files/chunks index data
|
|
* quick detection of unmodified files
|
|
|
|
**Data encryption**
|
|
All data can be protected using 256-bit AES encryption, data integrity and
|
|
authenticity is verified using HMAC-SHA256.
|
|
|
|
**Compression**
|
|
All data can be compressed by lz4 (super fast, low compression), zlib
|
|
(medium speed and compression) or lzma (low speed, high compression).
|
|
|
|
**Off-site backups**
|
|
Borg can store data on any remote host accessible over SSH. If Borg is
|
|
installed on the remote host, big performance gains can be achieved
|
|
compared to using a network filesystem (sshfs, nfs, ...).
|
|
|
|
**Backups mountable as filesystems**
|
|
Backup archives are mountable as userspace filesystems for easy interactive
|
|
backup examination and restores (e.g. by using a regular file manager).
|
|
|
|
**Platforms Borg works on**
|
|
* Linux
|
|
* FreeBSD
|
|
* Mac OS X
|
|
* Cygwin (unsupported)
|
|
|
|
**Free and Open Source Software**
|
|
* security and functionality can be audited independently
|
|
* licensed under the BSD (3-clause) license
|
|
|
|
|
|
Easy to use
|
|
~~~~~~~~~~~
|
|
Initialize a new backup repository and create a backup archive::
|
|
|
|
$ borg init /mnt/backup
|
|
$ borg create /mnt/backup::Monday ~/Documents
|
|
|
|
Now doing another backup, just to show off the great deduplication::
|
|
|
|
$ borg create --stats /mnt/backup::Tuesday ~/Documents
|
|
|
|
Archive name: Tuesday
|
|
Archive fingerprint: 387a5e3f9b0e792e91c...
|
|
Start time: Tue Mar 25 12:00:10 2014
|
|
End time: Tue Mar 25 12:00:10 2014
|
|
Duration: 0.08 seconds
|
|
Number of files: 358
|
|
Original size Compressed size Deduplicated size
|
|
This archive: 57.16 MB 46.78 MB 151.67 kB <--- !
|
|
All archives: 114.02 MB 93.46 MB 44.81 MB
|
|
|
|
For a graphical frontend refer to our complementary project
|
|
`BorgWeb <https://github.com/borgbackup/borgweb>`_.
|
|
|
|
|
|
Notes
|
|
-----
|
|
|
|
Borg is a fork of `Attic <https://github.com/jborg/attic>`_ and maintained by
|
|
"`The Borg Collective <https://github.com/borgbackup/borg/blob/master/AUTHORS>`_".
|
|
|
|
Read `issue #1 <https://github.com/borgbackup/borg/issues/1>`_ about the initial
|
|
considerations regarding project goals and policy of the Borg project.
|
|
|
|
BORG IS NOT COMPATIBLE WITH ORIGINAL ATTIC.
|
|
EXPECT THAT WE WILL BREAK COMPATIBILITY REPEATEDLY WHEN MAJOR RELEASE NUMBER
|
|
CHANGES (like when going from 0.x.y to 1.0.0). Please read CHANGES document.
|
|
|
|
NOT RELEASED DEVELOPMENT VERSIONS HAVE UNKNOWN COMPATIBILITY PROPERTIES.
|
|
|
|
THIS IS SOFTWARE IN DEVELOPMENT, DECIDE YOURSELF WHETHER IT FITS YOUR NEEDS.
|
|
|
|
For more information, please also see the
|
|
`LICENSE <https://github.com/borgbackup/borg/blob/master/LICENSE>`_.
|
|
|
|
|build| |coverage|
|
|
|
|
.. |build| image:: https://travis-ci.org/borgbackup/borg.svg
|
|
:alt: Build Status
|
|
:target: https://travis-ci.org/borgbackup/borg
|
|
|
|
.. |coverage| image:: http://codecov.io/github/borgbackup/borg/coverage.svg?branch=master
|
|
:alt: Test Coverage
|
|
:target: http://codecov.io/github/borgbackup/borg?branch=master
|