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- .. SPDX-License-Identifier: GPL-2.0
- =====
- BTRFS
- =====
- Btrfs is a copy on write filesystem for Linux aimed at implementing advanced
- features while focusing on fault tolerance, repair and easy administration.
- Jointly developed by several companies, licensed under the GPL and open for
- contribution from anyone.
- The main Btrfs features include:
- * Extent based file storage (2^64 max file size)
- * Space efficient packing of small files
- * Space efficient indexed directories
- * Dynamic inode allocation
- * Writable snapshots
- * Subvolumes (separate internal filesystem roots)
- * Object level mirroring and striping
- * Checksums on data and metadata (multiple algorithms available)
- * Compression (multiple algorithms available)
- * Reflink, deduplication
- * Scrub (on-line checksum verification)
- * Hierarchical quota groups (subvolume and snapshot support)
- * Integrated multiple device support, with several raid algorithms
- * Offline filesystem check
- * Efficient incremental backup and FS mirroring (send/receive)
- * Trim/discard
- * Online filesystem defragmentation
- * Swapfile support
- * Zoned mode
- * Read/write metadata verification
- * Online resize (shrink, grow)
- For more information please refer to the documentation site or wiki
- https://btrfs.readthedocs.io
- that maintains information about administration tasks, frequently asked
- questions, use cases, mount options, comprehensible changelogs, features,
- manual pages, source code repositories, contacts etc.
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