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89 lines
No EOL
3.8 KiB
PHP
89 lines
No EOL
3.8 KiB
PHP
.. IMPORTANT: this file is auto-generated from borg's built-in help, do not edit!
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.. _borg_compact:
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borg compact
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------------
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.. code-block:: none
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borg [common options] compact [options]
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.. only:: html
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.. class:: borg-options-table
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+-------------------------------------------------------+-----------------------+-----------------------------------------+
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| **options** |
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+-------------------------------------------------------+-----------------------+-----------------------------------------+
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| | ``-n``, ``--dry-run`` | do nothing |
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+-------------------------------------------------------+-----------------------+-----------------------------------------+
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| | ``-s``, ``--stats`` | print statistics (might be much slower) |
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+-------------------------------------------------------+-----------------------+-----------------------------------------+
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| .. class:: borg-common-opt-ref |
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| :ref:`common_options` |
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+-------------------------------------------------------+-----------------------+-----------------------------------------+
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.. raw:: html
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<script type='text/javascript'>
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$(document).ready(function () {
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$('.borg-options-table colgroup').remove();
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})
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</script>
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.. only:: latex
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options
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-n, --dry-run do nothing
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-s, --stats print statistics (might be much slower)
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:ref:`common_options`
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Description
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~~~~~~~~~~~
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Free repository space by deleting unused chunks.
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borg compact analyzes all existing archives to find out which repository
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objects are actually used (referenced). It then deletes all unused objects
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from the repository to free space.
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Unused objects may result from:
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- borg delete or prune usage
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- interrupted backups (maybe retry the backup first before running compact)
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- backup of source files that had an I/O error in the middle of their contents
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and that were skipped due to this
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- corruption of the repository (e.g. the archives directory having lost
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entries, see notes below)
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You usually don't want to run ``borg compact`` after every write operation, but
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either regularly (e.g. once a month, possibly together with ``borg check``) or
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when disk space needs to be freed.
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**Important:**
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After compacting it is no longer possible to use ``borg undelete`` to recover
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previously soft-deleted archives.
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``borg compact`` might also delete data from archives that were "lost" due to
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archives directory corruption. Such archives could potentially be restored with
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``borg check --find-lost-archives [--repair]``, which is slow. You therefore
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might not want to do that unless there are signs of lost archives (e.g. when
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seeing fatal errors when creating backups or when archives are missing in
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``borg repo-list``).
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When giving the ``--stats`` option, borg will internally list all repository
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objects to determine their existence AND stored size. It will build a fresh
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chunks index from that information and cache it in the repository. For some
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types of repositories, this might be very slow. It will tell you the sum of
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stored object sizes, before and after compaction.
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Without ``--stats``, borg will rely on the cached chunks index to determine
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existing object IDs (but there is no stored size information in the index,
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thus it can't compute before/after compaction size statistics). |