pyhardlinkbackup 0.12.1

pyhardlinkbackup

Hardlink/Deduplication Backups with Python.

• Backups should be saved as normal files in the 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

Requirement: Python 3.6 or newer.

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
      │   ├── phlb_config.ini
      │   ├── spreadsheet.ods
      │   ├── brief.odt
      │   └── important_files.ext
      └── 2016-01-07-102310
          ├── phlb_config.ini
          ├── spreadsheet.ods
          ├── brief.odt
          └── important_files.ext

Installation

Starting a backup run

To start a backup run, use this helper script:

• Windows batch: %ProgramFiles%\PyHardLinkBackup\pyhardlinkbackup_this_directory.cmd

• Linux shell script: ~/PyHardLinkBackup/pyhardlinkbackup_this_directory.sh

Copy this file to a location that should be backed up and just call it to run a backup.

Verifying an existing backup

$ cd pyhardlinkbackup/
~/PyHardLinkBackup $ source bin/activate

(PyHardLinkBackup) ~/PyHardLinkBackup $ phlb verify --fast ~/PyHardLinkBackups/documents/2016-01-07-102310

With –fast the files’ contents will not be checked. If not given: The hashes from the files’ contents will be calculated and compared. Thus, every file must be completely read from filesystem, so it will take some time.

A verify run does:

• Do all files in the backup exist?

• Compare file sizes

• Compare hashes from hash-file

• Compare files’ modification timestamps

• Calculate hashes from files’ contents and compare them (will be skipped if –fast used)

Configuration

phlb will use a configuration file named: PyHardLinkBackup.ini

Search order is:

1. current directory down to root

2. user directory

E.g. if the current working directoy is /foo/bar/my_files/ then the search path will be:

• /foo/bar/my_files/PyHardLinkBackup.ini

• /foo/bar/PyHardLinkBackup.ini

• /foo/PyHardLinkBackup.ini

• /PyHardLinkBackup.ini

• ~/PyHardLinkBackup.ini The user home directory under Windows/Linux

(PyHardLinkBackup) ~/PyHardLinkBackup $ phlb config

# Directory names that will be recursively excluded from backups (comma separated list!)
SKIP_DIRS= __pycache__, temp

# glob-style patterns to exclude files/folders from backups (used with Path.match(), Comma separated list!)
SKIP_PATTERNS= *.pyc, *.tmp, *.cache

Upgrading pyhardlinkbackup

To upgrade to a new version just start this helper script:

• Windows: phlb_upgrade_pyhardlinkbackup.cmd

• Linux: phlb_upgrade_pyhardlinkbackup.sh

Some notes

Running the unit tests

Just start: phlb_run_tests.cmd / phlb_run_tests.sh or do this:

$ cd pyhardlinkbackup/
~/PyHardLinkBackup $ source bin/activate
(PyHardLinkBackup) ~/PyHardLinkBackup $ manage test

Using the CLI

$ cd pyhardlinkbackup/
~/PyHardLinkBackup $ source bin/activate
(PyHardLinkBackup) ~/PyHardLinkBackup $ phlb --help
Usage: phlb [OPTIONS] COMMAND [ARGS]...

  pyhardlinkbackup

Options:
  --version  Show the version and exit.
  --help     Show this message and exit.

Commands:
  add     Scan all existing backup and add missing ones...
  backup  Start a Backup run
  config  Create/edit .ini config file
  helper  link helper files to given path
  verify  Verify a existing backup

Add missing backups to the database

phlb add can be used in different scenarios:

• recreate the database

• add a backup manually

phlb add does this:

• scan the complete file tree under BACKUP_PATH (default: ~/PyHardLinkBackups)

• recreate all hash files

• add all files to database

• deduplicate with hardlinks, if possible

So it’s possible to recreate the complete database:

• delete the current .sqlite file

• run phlb add to recreate

Another scenario is e.g.:

• DSLR images are stored on a network drive.

• You have already a copy of all files locally.

• You would like to add the local copy to pyhardlinkbackup.

Do the following steps:

• move the local files to a subdirectory below BACKUP_PATH

• e.g.: ~/PyHardLinkBackups/pictures/2015-12-29-000015/

• Note: the date format in the subdirectory name must match the SUB_DIR_FORMATTER in your config

• run: phlb add

Now you can run phlb backup from your network drive to make a new, up-to-date backup.

History

• dev - compare v0.12.1…master

  • TBC

• 05.03.2020 - v0.12.1 - compare v0.12.0…v0.12.1

  • revert lowercase PyHardLinkBackup for environment destination and default backup directory.

• 05.03.2020 - v0.12.0 - compare v0.11.0…v0.12.0

  • Refactor backup process: Use https://github.com/jedie/IterFilesystem for less RAM usage and faster start on big source trees

  • modernized project/sources:

    • Update to Django v2.2.x TLS

    • use poetry

    • add Makefile

    • run tests with pytest and tox

    • run tests only with python 3.8, 3.7, 3.6

    • run tests on github, too

    • remove support for python 3.5 (os.scandir fallback removed)

  • NOTE: Windows support is not tested, yet! (Help wanted)

• 03.03.2019 - v0.11.0 - compare v0.10.1…v0.11.0

  • Update boot files

  • Use django v1.11.x

• 09.09.2016 - v0.10.1 - compare v0.10.0…v0.10.1

  • Bugfix Catch scan dir errors #24

• 26.04.2016 - v0.10.0 - compare v0.9.1…v0.10.0

  • move under Windows the install location from %APPDATA%\PyHardLinkBackup to %ProgramFiles%\PyHardLinkBackup

  • to ‘migrate’: Just delete %APPDATA%\PyHardLinkBackup and install via boot_pyhardlinkbackup.cmd

• 26.04.2016 - v0.9.1 - compare v0.9.0…v0.9.1

  • run migrate database in boot process

  • Add missing migrate scripts

• 10.02.2016 - v0.9.0 - compare v0.8.0…v0.9.0

  • Work-a-round for Windows MAX_PATH limit: Use \\?\ path prefix internally.

  • move Path2() to external lib: https://github.com/jedie/pathlib_revised

• 04.02.2016 - v0.8.0 - compare v0.7.0…v0.8.0

  • New: add all missing backups to database: phlb add (s.above)

• 03.02.2016 - v0.7.0 - compare v0.6.4…v0.7.0

  • New: verify a existing backup

  • IMPORTANT: run database migration is needed!

• 01.02.2016 - v0.6.4 - compare v0.6.2…v0.6.4

  • Windows: Bugfix temp rename error, because of the Windows API limitation, see: #13

  • Linux: Bugfix scanner if symlink is broken

  • Display local variables on low level errors

• 29.01.2016 - v0.6.3 - compare v0.6.2…v0.6.3

  • Less verbose and better information about SKIP_DIRS/SKIP_PATTERNS hits

• 28.01.2016 - v0.6.2 - compare v0.6.1…v0.6.2

  • Handle unexpected errors and continue backup with the next file

  • Better handle interrupt key during execution

• 28.01.2016 - v0.6.1 - compare v0.6.0…v0.6.1

  • Bugfix #13 by using a better temp rename routine

• 28.01.2016 - v0.6.0 - compare v0.5.1…v0.6.0

  • New: faster backup by compare mtime/size only if old backup files exists

• 27.01.2016 - v0.5.1 - compare v0.5.0…v0.5.1

  • IMPORTANT: run database migration is needed!

  • New .ini setting: LANGUAGE_CODE for change translation

  • mark if backup was finished compled

  • Display information of last backup run

  • Add more information into summary file

• 27.01.2016 - v0.5.0 - compare v0.4.2…v0.5.0

  • refactory source tree scan. Split in two passed.

  • CHANGE SKIP_FILES in .ini config to: SKIP_PATTERNS

  • Backup from newest files to oldest files.

  • Fix #10:

    • New –name cli option (optional) to force a backup name.

    • Display error message if backup name can be found (e.g.: backup a root folder)

• 22.01.2016 - v0.4.2 - compare v0.4.1…v0.4.2

  • work-a-round for junction under windows, see also: https://www.python-forum.de/viewtopic.php?f=1&t=37725&p=290429#p290428 (de)

  • Bugfix in windows batches: go into work dir.

  • print some more status information in between.

• 22.01.2016 - v0.4.1 - compare v0.4.0…v0.4.1

  • Skip files that can’t be read/write. (and try to backup the remaining files)

• 21.01.2016 - v0.4.0 - compare v0.3.1…v0.4.0

  • Search for PyHardLinkBackup.ini file in every parent directory from the current working dir

  • increase default chunk size to 20MB

  • save summary and log file for every backup run

• 15.01.2016 - v0.3.1 - compare v0.3.0…v0.3.1

  • fix unittest run under windows

• 15.01.2016 - v0.3.0 - compare v0.2.0…v0.3.0

  • database migration needed

  • Add ‘no_link_source’ to database (e.g. Skip source, if 1024 links created under windows)

• 14.01.2016 - v0.2.0 - compare v0.1.8…v0.2.0

  • good unittests coverage that covers the backup process

• 08.01.2016 - v0.1.8 - compare v0.1.0alpha0…v0.1.8

  • install and runable under Windows

• 06.01.2016 - v0.1.0alpha0 - d42a5c5

  • first Release on PyPi

• 29.12.2015 - commit 2ce43

  • commit ‘Proof of concept’

Links

• https://pypi-hypernode.com/pypi/pyhardlinkbackup/

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

• https://github.com/jedie/pathlib_revised

Donating

• paypal.me/JensDiemer

• Flattr This!

• Send Bitcoins to 1823RZ5Md1Q2X5aSXRC5LRPcYdveCiVX6F

Note: this file is generated from README.creole 2020-03-05 22:34:42 with "python-creole"