1 .. SPDX-License-Identifier: GPL-2.0
2
3 =====
4 BTRFS
5 =====
6
7 Btrfs is a copy on write filesystem for Linux
8 features while focusing on fault tolerance, re
9 Jointly developed by several companies, licens
10 contribution from anyone.
11
12 The main Btrfs features include:
13
14 * Extent based file storage (2^64 max file
15 * Space efficient packing of small files
16 * Space efficient indexed directories
17 * Dynamic inode allocation
18 * Writable snapshots
19 * Subvolumes (separate internal filesystem
20 * Object level mirroring and striping
21 * Checksums on data and metadata (multiple
22 * Compression (multiple algorithms availab
23 * Reflink, deduplication
24 * Scrub (on-line checksum verification)
25 * Hierarchical quota groups (subvolume and
26 * Integrated multiple device support, with
27 * Offline filesystem check
28 * Efficient incremental backup and FS mirr
29 * Trim/discard
30 * Online filesystem defragmentation
31 * Swapfile support
32 * Zoned mode
33 * Read/write metadata verification
34 * Online resize (shrink, grow)
35
36 For more information please refer to the docum
37
38 https://btrfs.readthedocs.io
39
40
41 that maintains information about administratio
42 questions, use cases, mount options, comprehen
43 manual pages, source code repositories, contac
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