pyhardlinkbackup 0.1.1

HardLink/Deduplication Backups with Python

PyHardLinkBackup

Hardlink/Deduplication Backups with Python.

• Backups should be saved as normal files in filesystem:

  • accessible without any extra software or extra meta files

  • non-proprietary format

• Create backups with versioning

  • every backup run creates a complete filesystem snapshot tree

  • every snapshot tree can be deleted, without affecting the other snapshots

• Deduplication with hardlinks:

  • Store only changed files, all other via hardlinks

  • find duplicate files everywhere (even if renamed or moved files)

• useable under Windows and Linux

current state:

• python 3 only

• Alpha state

Please, try, fork and contribute! ;)

Example

$ phlb backup ~/my/important/documents
...start backup, some time later...
$ phlb backup ~/my/important/documents
...

This will create deduplication backups like this:

~/PyHardLinkBackups
  └── documents
      ├── 2016-01-07-085247
      │   ├── spreadsheet.ods
      │   ├── brief.odt
      │   └── important_files.ext
      └── 2016-01-07-102310
          ├── spreadsheet.ods
          ├── brief.odt
          └── important_files.ext

Try out:

1. Create a virtual env and install:

~$ virtualenv -p python3 PyHardLinkBackupEnv
$ cd PyHardLinkBackupEnv/
~/PyHardLinkBackupEnv $ source bin/activate
(PyHardLinkBackupEnv) ~/PyHardLinkBackupEnv $ pip install -U pip
(PyHardLinkBackupEnv) ~/PyHardLinkBackupEnv $ pip install -e git+https://github.com/jedie/PyHardLinkBackup.git#egg=PyHardLinkBackup

Note: If you not use python 3.5+, then ‘scandir’ will be installed and so you need the python3-dev package…

2. setup

create a .ini config file and edit it:

(PyHardLinkBackupEnv) ~/PyHardLinkBackupEnv $ phlb config

Initialize the database:

(PyHardLinkBackupEnv) ~/PyHardLinkBackupEnv $ phlb migrate

3. start a backup run

~$ ./PyHardLinkBackupEnv/bin/phlb backup ~/Photo

or:

~$ source ./PyHardLinkBackupEnv/bin/activate
(PyHardLinkBackupEnv) ~$ phlb backup ~/documents

configuration

phlb will used a configuration file named: PyHardLinkBackup.ini

Search order is:

1. current directory

2. user directory

You can just open the editor with the user directory .ini file with:

(PyHardLinkBackupEnv) ~/PyHardLinkBackupEnv $ phlb config

run unittests

$ cd PyHardLinkBackupEnv/
~/PyHardLinkBackupEnv $ source bin/activate
(PyHardLinkBackupEnv) ~/PyHardLinkBackupEnv $ phlb test

some notes

What is ‘phlb’ ?!?

the phlb executable is the similar to django manage.py, but it always used the PyHardLinkBackup settings.

Why in hell do you use django?!?

• Well, just because of the great database ORM and the Admin Site ;)

How to go into the django admin?

$ cd PyHardLinkBackupEnv/
~/PyHardLinkBackupEnv $ source bin/activate
(PyHardLinkBackupEnv) ~/PyHardLinkBackupEnv $ phlb runserver

And then just request ‘localhost’

TODO

• copy file meta data like owner, mode etc.

• handle symlinks

• Quick Backup: Don’t check the content, just compare file size + modification date

• use: https://github.com/jedie/bootstrap_env (So it’s better to install it under windows)

• Add some helper files to start a backup (.sh / .cmd scripts)

• write docs

• write more tests

• activate CI

• Far future: Add a GUI

Links

• https://pypi.python.org/pypi/PyHardlinkBackup/

• https://www.python-forum.de/viewtopic.php?f=6&t=37723 (de)