borg/docs/usage/analyze.rst.inc

.. IMPORTANT: this file is auto-generated from borg's built-in help, do not edit!

.. _borg_analyze:

borg analyze
------------
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    borg [common options] analyze [options]

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    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    | .. class:: borg-common-opt-ref                                                                                                                                                                                                                           |
    |                                                                                                                                                                                                                                                          |
    | :ref:`common_options`                                                                                                                                                                                                                                    |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    | **Archive filters** — Archive filters can be applied to repository targets.                                                                                                                                                                              |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    |                                                                             | ``-a PATTERN``, ``--match-archives PATTERN`` | only consider archives matching all patterns. See "borg help match-archives".                                               |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    |                                                                             | ``--sort-by KEYS``                           | Comma-separated list of sorting keys; valid keys are: timestamp, archive, name, id, tags, host, user; default is: timestamp |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    |                                                                             | ``--first N``                                | consider the first N archives after other filters are applied                                                               |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    |                                                                             | ``--last N``                                 | consider the last N archives after other filters are applied                                                                |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    |                                                                             | ``--oldest TIMESPAN``                        | consider archives between the oldest archive's timestamp and (oldest + TIMESPAN), e.g., 7d or 12m.                          |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    |                                                                             | ``--newest TIMESPAN``                        | consider archives between the newest archive's timestamp and (newest - TIMESPAN), e.g., 7d or 12m.                          |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    |                                                                             | ``--older TIMESPAN``                         | consider archives older than (now - TIMESPAN), e.g., 7d or 12m.                                                             |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+
    |                                                                             | ``--newer TIMESPAN``                         | consider archives newer than (now - TIMESPAN), e.g., 7d or 12m.                                                             |
    +-----------------------------------------------------------------------------+----------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------+

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    :ref:`common_options`
        |

    Archive filters
        -a PATTERN, --match-archives PATTERN     only consider archives matching all patterns. See "borg help match-archives".
        --sort-by KEYS                           Comma-separated list of sorting keys; valid keys are: timestamp, archive, name, id, tags, host, user; default is: timestamp
        --first N                                consider the first N archives after other filters are applied
        --last N                                 consider the last N archives after other filters are applied
        --oldest TIMESPAN                        consider archives between the oldest archive's timestamp and (oldest + TIMESPAN), e.g., 7d or 12m.
        --newest TIMESPAN                        consider archives between the newest archive's timestamp and (newest - TIMESPAN), e.g., 7d or 12m.
        --older TIMESPAN                         consider archives older than (now - TIMESPAN), e.g., 7d or 12m.
        --newer TIMESPAN                         consider archives newer than (now - TIMESPAN), e.g., 7d or 12m.


Description
~~~~~~~~~~~

Analyze archives to find "hot spots".

``borg analyze`` relies on the usual archive matching options to select the
archives that should be considered for analysis (e.g. ``-a series_name``).
Then it iterates over all matching archives, over all contained files, and
collects information about chunks stored in all directories it encounters.

It considers chunk IDs and their plaintext sizes (we do not have the compressed
size in the repository easily available) and adds up the sizes of added and removed
chunks per direct parent directory, and outputs a list of "directory: size".

You can use that list to find directories with a lot of "activity" — maybe
some of these are temporary or cache directories you forgot to exclude.

To avoid including these unwanted directories in your backups, you can carefully
exclude them in ``borg create`` (for future backups) or use ``borg recreate``
to recreate existing archives without them.