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Merge pull request #2740 from metalsp0rk/document-json
Add JSON documentation
This commit is contained in:
Michael Eischer
GitHub
commit
41395e83c5
@ -37,3 +37,538 @@ exit code if a different error is encountered (e.g.: incorrect password
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to ``cat config``) and it may print a different error message. If there
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are no errors, restic will return a zero exit code and print the repository
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metadata.
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JSON output
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***********
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Restic outputs JSON data to ``stdout`` if requested with the ``--json`` flag.
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The structure of that data varies depending on the circumstance. The
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JSON output of most restic commands are documented here.
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.. note::
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Not all commands support JSON output. If a command does not support JSON output,
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feel free to submit a pull request!
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.. warning::
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We try to keep the JSON output backwards compatible. However, new message types
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or fields may be added at any time. Similarly, enum-like fields for which a fixed
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list of allowed values is documented may be extended at any time.
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Output formats
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--------------
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Currently only the output on ``stdout`` is JSON formatted. Errors printed on ``stderr``
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are still printed as plain text messages. The generated JSON output uses one of the
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following two formats.
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Single JSON document
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^^^^^^^^^^^^^^^^^^^^
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Several commands output a single JSON document that can be parsed in its entirety.
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Depending on the command, the output consists of either a single or multiple lines.
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JSON lines
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^^^^^^^^^^
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Several commands, in particular long running ones or those that generate a large output,
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use a format also known as JSON lines. It consists of a stream of new-line separated JSON
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messages. You can determine the nature of the message using the ``message_type`` field.
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As an exception, the ``ls`` command uses the field ``struct_type`` instead.
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backup
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------
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The ``backup`` command uses the JSON lines format with the following message types.
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Status
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^^^^^^
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+----------------------+------------------------------------------------------------+
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|``message_type`` | Always "status" |
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+----------------------+------------------------------------------------------------+
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|``seconds_elapsed`` | Time since backup started |
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+----------------------+------------------------------------------------------------+
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|``seconds_remaining`` | Estimated time remaining |
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+----------------------+------------------------------------------------------------+
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|``percent_done`` | Percentage of data backed up (bytes_done/total_bytes) |
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+----------------------+------------------------------------------------------------+
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|``total_files`` | Total number of files detected |
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+----------------------+------------------------------------------------------------+
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|``files_done`` | Files completed (backed up to repo) |
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+----------------------+------------------------------------------------------------+
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|``total_bytes`` | Total number of bytes in backup set |
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+----------------------+------------------------------------------------------------+
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|``bytes_done`` | Number of bytes completed (backed up to repo) |
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+----------------------+------------------------------------------------------------+
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|``error_count`` | Number of errors |
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+----------------------+------------------------------------------------------------+
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|``current_files`` | List of files currently being backed up |
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+----------------------+------------------------------------------------------------+
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Error
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^^^^^
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+----------------------+-------------------------------------------+
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| ``message_type`` | Always "error" |
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+----------------------+-------------------------------------------+
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| ``error`` | Error message |
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+----------------------+-------------------------------------------+
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| ``during`` | What restic was trying to do |
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+----------------------+-------------------------------------------+
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| ``item`` | Usually, the path of the problematic file |
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+----------------------+-------------------------------------------+
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Verbose Status
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^^^^^^^^^^^^^^
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Verbose status provides details about the progress, including details about backed up files.
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+----------------------+-----------------------------------------------------------+
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| ``message_type`` | Always "verbose_status" |
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+----------------------+-----------------------------------------------------------+
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| ``action`` | Either "new", "unchanged", "modified" or "scan_finished" |
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+----------------------+-----------------------------------------------------------+
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| ``item`` | The item in question |
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+----------------------+-----------------------------------------------------------+
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| ``duration`` | How long it took, in seconds |
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+----------------------+-----------------------------------------------------------+
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| ``data_size`` | How big the item is |
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+----------------------+-----------------------------------------------------------+
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| ``metadata_size`` | How big the metadata is |
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+----------------------+-----------------------------------------------------------+
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| ``total_files`` | Total number of files |
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+----------------------+-----------------------------------------------------------+
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Summary
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^^^^^^^
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Summary is the last output line in a successful backup.
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+---------------------------+---------------------------------------------------------+
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| ``message_type`` | Always "summary" |
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+---------------------------+---------------------------------------------------------+
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| ``files_new`` | Number of new files |
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+---------------------------+---------------------------------------------------------+
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| ``files_changed`` | Number of files that changed |
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+---------------------------+---------------------------------------------------------+
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| ``files_unmodified`` | Number of files that did not change |
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+---------------------------+---------------------------------------------------------+
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| ``dirs_new`` | Number of new directories |
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+---------------------------+---------------------------------------------------------+
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| ``dirs_changed`` | Number of directories that changed |
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+---------------------------+---------------------------------------------------------+
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| ``dirs_unmodified`` | Number of directories that did not change |
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+---------------------------+---------------------------------------------------------+
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| ``data_blobs`` | Number of data blobs |
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+---------------------------+---------------------------------------------------------+
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| ``tree_blobs`` | Number of tree blobs |
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+---------------------------+---------------------------------------------------------+
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| ``data_added`` | Amount of data added, in bytes |
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+---------------------------+---------------------------------------------------------+
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| ``total_files_processed`` | Total number of files processed |
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+---------------------------+---------------------------------------------------------+
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| ``total_bytes_processed`` | Total number of bytes processed |
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+---------------------------+---------------------------------------------------------+
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| ``total_duration`` | Total time it took for the operation to complete |
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+---------------------------+---------------------------------------------------------+
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| ``snapshot_id`` | ID of the new snapshot |
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+---------------------------+---------------------------------------------------------+
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cat
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---
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The ``cat`` command returns data about various objects in the repository, which
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are stored in JSON form. Specifying ``--json`` or ``--quiet`` will suppress any
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non-JSON messages the command generates.
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diff
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----
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The ``diff`` command uses the JSON lines format with the following message types.
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change
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^^^^^^
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+------------------+--------------------------------------------------------------+
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| ``message_type`` | Always "change" |
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+------------------+--------------------------------------------------------------+
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| ``path`` | Path that has changed |
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+------------------+--------------------------------------------------------------+
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| ``modifier`` | Type of change, a concatenation of the following characters: |
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| | "+" = added, "-" = removed, "T" = entry type changed, |
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| | "M" = file content changed, "U" = metadata changed |
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+------------------+--------------------------------------------------------------+
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statistics
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^^^^^^^^^^
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+---------------------+----------------------------+
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| ``message_type`` | Always "statistics" |
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+---------------------+----------------------------+
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| ``source_snapshot`` | ID of first snapshot |
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+---------------------+----------------------------+
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| ``target_snapshot`` | ID of second snapshot |
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+---------------------+----------------------------+
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| ``changed_files`` | Number of changed files |
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+---------------------+----------------------------+
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| ``added`` | DiffStat object, see below |
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+---------------------+----------------------------+
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| ``removed`` | DiffStat object, see below |
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+---------------------+----------------------------+
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DiffStat object
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+----------------+-------------------------------------------+
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| ``files`` | Number of changed files |
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+----------------+-------------------------------------------+
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| ``dirs`` | Number of changed directories |
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+----------------+-------------------------------------------+
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| ``others`` | Number of changed other directory entries |
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+----------------+-------------------------------------------+
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| ``data_blobs`` | Number of data blobs |
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+----------------+-------------------------------------------+
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| ``tree_blobs`` | Number of tree blobs |
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+----------------+-------------------------------------------+
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| ``bytes`` | Number of bytes |
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+----------------+-------------------------------------------+
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find
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----
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The ``find`` command outputs a single JSON document containing an array of JSON
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objects with matches for your search term. These matches are organized by snapshot.
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If the ``--blob`` or ``--tree`` option is passed, then the output is an array of
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Blob objects.
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+-----------------+----------------------------------------------+
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| ``hits`` | Number of matches in the snapshot |
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+-----------------+----------------------------------------------+
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| ``snapshot`` | ID of the snapshot |
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+-----------------+----------------------------------------------+
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| ``matches`` | Array of Match objects detailing a match |
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+-----------------+----------------------------------------------+
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Match object
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+-----------------+----------------------------------------------+
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| ``path`` | Object path |
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+-----------------+----------------------------------------------+
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| ``permissions`` | UNIX permissions |
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+-----------------+----------------------------------------------+
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| ``type`` | Object type e.g. file, dir, etc... |
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+-----------------+----------------------------------------------+
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| ``atime`` | Access time |
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+-----------------+----------------------------------------------+
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| ``mtime`` | Modification time |
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+-----------------+----------------------------------------------+
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| ``ctime`` | Change time |
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+-----------------+----------------------------------------------+
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| ``name`` | Object name |
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+-----------------+----------------------------------------------+
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| ``user`` | Name of owner |
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+-----------------+----------------------------------------------+
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| ``group`` | Name of group |
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+-----------------+----------------------------------------------+
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| ``mode`` | UNIX file mode, shorthand of ``permissions`` |
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+-----------------+----------------------------------------------+
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| ``device_id`` | OS specific device identifier |
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+-----------------+----------------------------------------------+
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| ``links`` | Number of hardlinks |
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+-----------------+----------------------------------------------+
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| ``uid`` | ID of owner |
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+-----------------+----------------------------------------------+
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| ``gid`` | ID of group |
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+-----------------+----------------------------------------------+
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| ``size`` | Size of object in bytes |
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+-----------------+----------------------------------------------+
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Blob object
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+-----------------+--------------------------------------------+
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| ``object_type`` | Either "blob" or "tree" |
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+-----------------+--------------------------------------------+
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| ``id`` | ID of found blob |
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+-----------------+--------------------------------------------+
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| ``path`` | Path in snapshot |
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+-----------------+--------------------------------------------+
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| ``parent_tree`` | Parent tree blob, only set for type "blob" |
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+-----------------+--------------------------------------------+
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| ``snapshot`` | Snapshot ID |
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+-----------------+--------------------------------------------+
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| ``time`` | Snapshot timestamp |
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+-----------------+--------------------------------------------+
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forget
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------
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The ``forget`` command prints a single JSON document containing an array of
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ForgetGroups. If specific snapshot IDs are specified, then no output is generated.
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The ``prune`` command does not yet support JSON such that ``forget --prune``
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results in a mix of JSON and text output.
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ForgetGroup
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^^^^^^^^^^^
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+-------------+-----------------------------------------------------------+
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| ``tags`` | Tags identifying the snapshot group |
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+-------------+-----------------------------------------------------------+
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| ``host`` | Host identifying the snapshot group |
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+-------------+-----------------------------------------------------------+
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| ``paths`` | Paths identifying the snapshot group |
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+-------------+-----------------------------------------------------------+
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| ``keep`` | Array of Snapshot objects that are kept |
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+-------------+-----------------------------------------------------------+
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| ``remove`` | Array of Snapshot objects that were removed |
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+-------------+-----------------------------------------------------------+
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| ``reasons`` | Array of Reason objects describing why a snapshot is kept |
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+-------------+-----------------------------------------------------------+
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Snapshot object
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+---------------------+--------------------------------------------------+
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| ``time`` | Timestamp of when the backup was started |
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+---------------------+--------------------------------------------------+
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| ``parent`` | ID of the parent snapshot |
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+---------------------+--------------------------------------------------+
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| ``tree`` | ID of the root tree blob |
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+---------------------+--------------------------------------------------+
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| ``paths`` | List of paths included in the backup |
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+---------------------+--------------------------------------------------+
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| ``hostname`` | Hostname of the backed up machine |
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+---------------------+--------------------------------------------------+
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| ``username`` | Username the backup command was run as |
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+---------------------+--------------------------------------------------+
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| ``uid`` | ID of owner |
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+---------------------+--------------------------------------------------+
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| ``gid`` | ID of group |
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+---------------------+--------------------------------------------------+
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| ``excludes`` | List of paths and globs excluded from the backup |
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+---------------------+--------------------------------------------------+
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| ``tags`` | List of tags for the snapshot in question |
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+---------------------+--------------------------------------------------+
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| ``program_version`` | restic version used to create snapshot |
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+---------------------+--------------------------------------------------+
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| ``id`` | Snapshot ID |
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+---------------------+--------------------------------------------------+
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| ``short_id`` | Snapshot ID, short form |
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+---------------------+--------------------------------------------------+
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Reason object
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+----------------+---------------------------------------------------------+
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| ``snapshot`` | Snapshot object, without ``id`` and ``short_id`` fields |
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+----------------+---------------------------------------------------------+
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| ``matches`` | Array containing descriptions of the matching criteria |
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+----------------+---------------------------------------------------------+
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| ``counters`` | Object containing counters used by the policies |
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+----------------+---------------------------------------------------------+
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init
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----
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The ``init`` command uses the JSON lines format, but only outputs a single message.
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+------------------+--------------------------------+
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| ``message_type`` | Always "initialized" |
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+------------------+--------------------------------+
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| ``id`` | ID of the created repository |
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+------------------+--------------------------------+
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| ``repository`` | URL of the repository |
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+------------------+--------------------------------+
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key list
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--------
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The ``key list`` command returns an array of objects with the following structure.
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+--------------+------------------------------------+
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| ``current`` | Is currently used key? |
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+--------------+------------------------------------+
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| ``id`` | Unique key ID |
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+--------------+------------------------------------+
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| ``userName`` | User who created it |
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+--------------+------------------------------------+
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| ``hostName`` | Name of machine it was created on |
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+--------------+------------------------------------+
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| ``created`` | Timestamp when it was created |
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+--------------+------------------------------------+
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ls
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--
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The ``ls`` command uses the JSON lines format with the following message types.
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As an exception, the ``struct_type`` field is used to determine the message type.
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snapshot
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^^^^^^^^
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||||
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+----------------+--------------------------------------------------+
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| ``struct_type``| Always "snapshot" |
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||||
+----------------+--------------------------------------------------+
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||||
| ``time`` | Timestamp of when the backup was started |
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||||
+----------------+--------------------------------------------------+
|
||||
| ``parent`` | ID of the parent snapshot |
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||||
+----------------+--------------------------------------------------+
|
||||
| ``tree`` | ID of the root tree blob |
|
||||
+----------------+--------------------------------------------------+
|
||||
| ``paths`` | List of paths included in the backup |
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||||
+----------------+--------------------------------------------------+
|
||||
| ``hostname`` | Hostname of the backed up machine |
|
||||
+----------------+--------------------------------------------------+
|
||||
| ``username`` | Username the backup command was run as |
|
||||
+----------------+--------------------------------------------------+
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||||
| ``uid`` | ID of owner |
|
||||
+----------------+--------------------------------------------------+
|
||||
| ``gid`` | ID of group |
|
||||
+----------------+--------------------------------------------------+
|
||||
| ``excludes`` | List of paths and globs excluded from the backup |
|
||||
+----------------+--------------------------------------------------+
|
||||
| ``tags`` | List of tags for the snapshot in question |
|
||||
+----------------+--------------------------------------------------+
|
||||
| ``id`` | Snapshot ID |
|
||||
+----------------+--------------------------------------------------+
|
||||
| ``short_id`` | Snapshot ID, short form |
|
||||
+----------------+--------------------------------------------------+
|
||||
|
||||
|
||||
node
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||||
^^^^
|
||||
|
||||
+-----------------+--------------------------+
|
||||
| ``struct_type`` | Always "node" |
|
||||
+-----------------+--------------------------+
|
||||
| ``name`` | Node name |
|
||||
+-----------------+--------------------------+
|
||||
| ``type`` | Node type |
|
||||
+-----------------+--------------------------+
|
||||
| ``path`` | Node path |
|
||||
+-----------------+--------------------------+
|
||||
| ``uid`` | UID of node |
|
||||
+-----------------+--------------------------+
|
||||
| ``gid`` | GID of node |
|
||||
+-----------------+--------------------------+
|
||||
| ``size`` | Size in bytes |
|
||||
+-----------------+--------------------------+
|
||||
| ``mode`` | Node mode |
|
||||
+-----------------+--------------------------+
|
||||
| ``atime`` | Node access time |
|
||||
+-----------------+--------------------------+
|
||||
| ``mtime`` | Node modification time |
|
||||
+-----------------+--------------------------+
|
||||
| ``ctime`` | Node creation time |
|
||||
+-----------------+--------------------------+
|
||||
|
||||
|
||||
restore
|
||||
-------
|
||||
|
||||
The ``restore`` command uses the JSON lines format with the following message types.
|
||||
|
||||
Status
|
||||
^^^^^^
|
||||
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``message_type`` | Always "status" |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``seconds_elapsed`` | Time since restore started |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``percent_done`` | Percentage of data backed up (bytes_restored/total_bytes) |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``total_files`` | Total number of files detected |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``files_restored`` | Files restored |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``total_bytes`` | Total number of bytes in restore set |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``bytes_restored`` | Number of bytes restored |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|
||||
|
||||
Summary
|
||||
^^^^^^^
|
||||
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``message_type`` | Always "summary" |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``seconds_elapsed`` | Time since restore started |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``total_files`` | Total number of files detected |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``files_restored`` | Files restored |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``total_bytes`` | Total number of bytes in restore set |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|``bytes_restored`` | Number of bytes restored |
|
||||
+----------------------+------------------------------------------------------------+
|
||||
|
||||
|
||||
snapshots
|
||||
---------
|
||||
|
||||
The snapshots command returns a single JSON object, an array with objects of the structure outlined below.
|
||||
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``time`` | Timestamp of when the backup was started |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``parent`` | ID of the parent snapshot |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``tree`` | ID of the root tree blob |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``paths`` | List of paths included in the backup |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``hostname`` | Hostname of the backed up machine |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``username`` | Username the backup command was run as |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``uid`` | ID of owner |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``gid`` | ID of group |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``excludes`` | List of paths and globs excluded from the backup |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``tags`` | List of tags for the snapshot in question |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``program_version`` | restic version used to create snapshot |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``id`` | Snapshot ID |
|
||||
+---------------------+--------------------------------------------------+
|
||||
| ``short_id`` | Snapshot ID, short form |
|
||||
+---------------------+--------------------------------------------------+
|
||||
|
||||
|
||||
stats
|
||||
-----
|
||||
|
||||
The snapshots command returns a single JSON object.
|
||||
|
||||
+------------------------------+-----------------------------------------------------+
|
||||
| ``total_size`` | Repository size in bytes |
|
||||
+------------------------------+-----------------------------------------------------+
|
||||
| ``total_file_count`` | Number of files backed up in the repository |
|
||||
+------------------------------+-----------------------------------------------------+
|
||||
| ``total_blob_count`` | Number of blobs in the repository |
|
||||
+------------------------------+-----------------------------------------------------+
|
||||
| ``snapshots_count`` | Number of processed snapshots |
|
||||
+------------------------------+-----------------------------------------------------+
|
||||
| ``total_uncompressed_size`` | Repository size in bytes if blobs were uncompressed |
|
||||
+------------------------------+-----------------------------------------------------+
|
||||
| ``compression_ratio`` | Factor by which the already compressed data |
|
||||
| | has shrunk due to compression |
|
||||
+------------------------------+-----------------------------------------------------+
|
||||
| ``compression_progress`` | Percentage of already compressed data |
|
||||
+------------------------------+-----------------------------------------------------+
|
||||
| ``compression_space_saving`` | Overall space saving due to compression |
|
||||
+------------------------------+-----------------------------------------------------+
|
||||
|
||||
Loading…
Reference in New Issue
Block a user