No Description
Thomas Waldmann f541d6e689 display msgpack version as part of sysinfo (e.g. in tracebacks) 1 day ago
.github Create ISSUE_TEMPLATE.md 11 months ago
.travis remove already commented cflags / ldflags 1 week ago
docs build_man 1 day ago
requirements.d add pkg-config support, fixes #1925 1 week ago
scripts Shell completions: removed deprecated and added new options 1 week ago
src/borg display msgpack version as part of sysinfo (e.g. in tracebacks) 1 day ago
.coafile coala: exclude some more stuff, move ignores to "all" section 8 months ago
.coveragerc fix packaging/git/coverage for src/ path 2 years ago
.editorconfig add a basic .editorconfig, fixes #2734 1 year ago
.gitattributes gitattributes: docs/usage/*.rst.INC merge=ours 1 year ago
.gitignore python 3.5+ does not generate .pyo any more 1 year ago
.mailmap Add .mailmap 1 year ago
.travis.yml Revert "drop support for python 3.5, fixes #3919" 3 months ago
AUTHORS file_integrity: use xxh64 1 year ago
CHANGES.rst remove unneeded rst boilerplate 3 years ago
LICENSE Update copyright year 1 month ago
MANIFEST.in include .coveragerc, needed by tox.ini 10 months ago
README.rst Fix tiny typo in README 3 months ago
Vagrantfile Vagrantfile: add zstd, reorder, build env vars, fixes #4444 1 week ago
conftest.py Explicitly convert environment variable to str to address #4136 4 months ago
setup.cfg flake8: use separate lines for different classes of flake8 ignores 4 months ago
setup.py lib/header locating: add docs, move env vars querying to setup.py 1 week ago
setup_compress.py lib/header locating: add docs, move env vars querying to setup.py 1 week ago
setup_crypto.py lib/header locating: add docs, move env vars querying to setup.py 1 week ago
setup_docs.py setup.py: move long_description generation to setup_docs 1 week ago
tox.ini add pkg-config support, fixes #1925 1 week ago

README.rst

|screencast_basic|

More screencasts: `installation`_, `advanced usage`_

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.

See the `installation manual`_ or, if you have already
downloaded Borg, ``docs/installation.rst`` to get started with Borg.
There is also an `offline documentation`_ available, in multiple formats.

.. _installation manual: https://borgbackup.readthedocs.org/en/stable/installation.html
.. _offline documentation: https://readthedocs.org/projects/borgbackup/downloads

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.

A chunk is considered duplicate if its id_hash value is identical.
A cryptographically strong hash or MAC function is used as id_hash, e.g.
(hmac-)sha256.

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 need to 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. Data is encrypted clientside.

**Compression**
All data can be optionally compressed:

* lz4 (super fast, low compression)
* zstd (wide range from high speed and low compression to high compression
and lower speed)
* zlib (medium speed and compression)
* 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).

**Easy installation on multiple platforms**
We offer single-file binaries that do not require installing anything -
you can just run them on these platforms:

* Linux
* Mac OS X
* FreeBSD
* OpenBSD and NetBSD (no xattrs/ACLs support or binaries yet)
* Cygwin (experimental, no binaries yet)
* Linux Subsystem of Windows 10 (experimental)

**Free and Open Source Software**
* security and functionality can be audited independently
* licensed under the BSD (3-clause) license, see `License`_ for the
complete license

Easy to use
~~~~~~~~~~~

Initialize a new backup repository (see ``borg init --help`` for encryption options)::

$ borg init -e repokey /path/to/repo

Create a backup archive::

$ borg create /path/to/repo::Saturday1 ~/Documents

Now doing another backup, just to show off the great deduplication::

$ borg create -v --stats /path/to/repo::Saturday2 ~/Documents
-----------------------------------------------------------------------------
Archive name: Saturday2
Archive fingerprint: 622b7c53c...
Time (start): Sat, 2016-02-27 14:48:13
Time (end): Sat, 2016-02-27 14:48:14
Duration: 0.88 seconds
Number of files: 163
-----------------------------------------------------------------------------
Original size Compressed size Deduplicated size
This archive: 6.85 MB 6.85 MB 30.79 kB <-- !
All archives: 13.69 MB 13.71 MB 6.88 MB

Unique chunks Total chunks
Chunk index: 167 330
-----------------------------------------------------------------------------


For a graphical frontend refer to our complementary project `BorgWeb <https://borgweb.readthedocs.io/>`_.

Helping, Donations and Bounties
-------------------------------

Your help is always welcome!
Spread the word, give feedback, help with documentation, testing or development.

You can also give monetary support to the project, see there for details:

https://www.borgbackup.org/support/free.html#bounties-and-fundraisers

Links
-----

* `Main Web Site <https://borgbackup.readthedocs.org/>`_
* `Releases <https://github.com/borgbackup/borg/releases>`_,
`PyPI packages <https://pypi.python.org/pypi/borgbackup>`_ and
`ChangeLog <https://github.com/borgbackup/borg/blob/master/docs/changes.rst>`_
* `Offline Documentation <https://readthedocs.org/projects/borgbackup/downloads>`_
* `GitHub <https://github.com/borgbackup/borg>`_ and
`Issue Tracker <https://github.com/borgbackup/borg/issues>`_.
* `Web-Chat (IRC) <http://webchat.freenode.net/?randomnick=1&channels=%23borgbackup&uio=MTY9dHJ1ZSY5PXRydWUa8>`_ and
`Mailing List <https://mail.python.org/mailman/listinfo/borgbackup>`_
* `License <https://borgbackup.readthedocs.org/en/stable/authors.html#license>`_
* `Security contact <https://borgbackup.readthedocs.io/en/latest/support.html#security-contact>`_

Compatibility notes
-------------------

EXPECT THAT WE WILL BREAK COMPATIBILITY REPEATEDLY WHEN MAJOR RELEASE NUMBER
CHANGES (like when going from 0.x.y to 1.0.0 or from 1.x.y to 2.0.0).

NOT RELEASED DEVELOPMENT VERSIONS HAVE UNKNOWN COMPATIBILITY PROPERTIES.

THIS IS SOFTWARE IN DEVELOPMENT, DECIDE YOURSELF WHETHER IT FITS YOUR NEEDS.

Security issues should be reported to the `Security contact`_ (or
see ``docs/suppport.rst`` in the source distribution).

.. start-badges

|doc| |build| |coverage| |bestpractices| |bounties|

.. |bounties| image:: https://api.bountysource.com/badge/team?team_id=78284&style=bounties_posted
:alt: Bounty Source
:target: https://www.bountysource.com/teams/borgbackup

.. |doc| image:: https://readthedocs.org/projects/borgbackup/badge/?version=stable
:alt: Documentation
:target: https://borgbackup.readthedocs.org/en/stable/

.. |build| image:: https://api.travis-ci.org/borgbackup/borg.svg
:alt: Build Status
:target: https://travis-ci.org/borgbackup/borg

.. |coverage| image:: https://codecov.io/github/borgbackup/borg/coverage.svg?branch=master
:alt: Test Coverage
:target: https://codecov.io/github/borgbackup/borg?branch=master

.. |screencast_basic| image:: https://asciinema.org/a/133292.png
:alt: BorgBackup Basic Usage
:target: https://asciinema.org/a/133292?autoplay=1&speed=1

.. _installation: https://asciinema.org/a/133291?autoplay=1&speed=1

.. _advanced usage: https://asciinema.org/a/133293?autoplay=1&speed=1

.. |bestpractices| image:: https://bestpractices.coreinfrastructure.org/projects/271/badge
:alt: Best Practices Score
:target: https://bestpractices.coreinfrastructure.org/projects/271

.. end-badges