Documentation/filesystems/btrfs.rst

   1 .. SPDX-License-Identifier: GPL-2.0
   2
   3 =====
   4 BTRFS
   5 =====
   6
   7 Btrfs is a copy on write filesystem for Linux aimed at implementing advanced
   8 features while focusing on fault tolerance, repair and easy administration.
   9 Jointly developed by several companies, licensed under the GPL and open for
  10 contribution from anyone.
  11
  12 The main Btrfs features include:
  13
  14     * Extent based file storage (2^64 max file size)
  15     * Space efficient packing of small files
  16     * Space efficient indexed directories
  17     * Dynamic inode allocation
  18     * Writable snapshots
  19     * Subvolumes (separate internal filesystem roots)
  20     * Object level mirroring and striping
  21     * Checksums on data and metadata (multiple algorithms available)
  22     * Compression
  23     * Integrated multiple device support, with several raid algorithms
  24     * Offline filesystem check
  25     * Efficient incremental backup and FS mirroring
  26     * Online filesystem defragmentation
  27
  28 For more information please refer to the wiki
  29
  30   https://btrfs.wiki.kernel.org
  31
  32 that maintains information about administration tasks, frequently asked
  33 questions, use cases, mount options, comprehensible changelogs, features,
  34 manual pages, source code repositories, contacts etc.