2021-10-26 22:45:24 +00:00
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btrfs-quota(8)
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==============
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SYNOPSIS
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--------
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**btrfs quota** <subcommand> <args>
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DESCRIPTION
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-----------
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The commands under **btrfs quota** are used to affect the global status of quotas
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of a btrfs filesystem. The quota groups (qgroups) are managed by the subcommand
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2022-08-08 07:28:56 +00:00
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:doc:`btrfs-qgroup(8)<btrfs-qgroup>`.
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2021-10-26 22:45:24 +00:00
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.. note::
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Qgroups are different than the traditional user quotas and designed
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to track shared and exclusive data per-subvolume. Please refer to the section
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*HIERARCHICAL QUOTA GROUP CONCEPTS* for a detailed description.
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PERFORMANCE IMPLICATIONS
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^^^^^^^^^^^^^^^^^^^^^^^^
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When quotas are activated, they affect all extent processing, which takes a
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performance hit. Activation of qgroups is not recommended unless the user
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intends to actually use them.
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STABILITY STATUS
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^^^^^^^^^^^^^^^^
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The qgroup implementation has turned out to be quite difficult as it affects
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the core of the filesystem operation. Qgroup users have hit various corner cases
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over time, such as incorrect accounting or system instability. The situation is
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gradually improving and issues found and fixed.
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HIERARCHICAL QUOTA GROUP CONCEPTS
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---------------------------------
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2021-12-09 19:46:42 +00:00
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.. include:: ch-quota-intro.rst
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2021-10-26 22:45:24 +00:00
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SUBCOMMAND
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----------
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disable <path>
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Disable subvolume quota support for a filesystem.
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enable <path>
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Enable subvolume quota support for a filesystem.
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rescan [-s] <path>
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Trash all qgroup numbers and scan the metadata again with the current config.
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``Options``
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-s
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show status of a running rescan operation.
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-w
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wait for rescan operation to finish(can be already in progress).
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EXIT STATUS
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-----------
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**btrfs quota** returns a zero exit status if it succeeds. Non zero is
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returned in case of failure.
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AVAILABILITY
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------------
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**btrfs** is part of btrfs-progs.
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Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for
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further details.
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SEE ALSO
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--------
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2022-08-08 07:28:56 +00:00
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:doc:`btrfs-qgroup(8)<btrfs-qgroup>`,
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:doc:`btrfs-subvolume(8)<btrfs-subvolume>`,
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:doc:`mkfs.btrfs(8)<mkfs.btrfs>`
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