162306a36Sopenharmony_ci.. SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci===== 462306a36Sopenharmony_ciBTRFS 562306a36Sopenharmony_ci===== 662306a36Sopenharmony_ci 762306a36Sopenharmony_ciBtrfs is a copy on write filesystem for Linux aimed at implementing advanced 862306a36Sopenharmony_cifeatures while focusing on fault tolerance, repair and easy administration. 962306a36Sopenharmony_ciJointly developed by several companies, licensed under the GPL and open for 1062306a36Sopenharmony_cicontribution from anyone. 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ciThe main Btrfs features include: 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci * Extent based file storage (2^64 max file size) 1562306a36Sopenharmony_ci * Space efficient packing of small files 1662306a36Sopenharmony_ci * Space efficient indexed directories 1762306a36Sopenharmony_ci * Dynamic inode allocation 1862306a36Sopenharmony_ci * Writable snapshots 1962306a36Sopenharmony_ci * Subvolumes (separate internal filesystem roots) 2062306a36Sopenharmony_ci * Object level mirroring and striping 2162306a36Sopenharmony_ci * Checksums on data and metadata (multiple algorithms available) 2262306a36Sopenharmony_ci * Compression (multiple algorithms available) 2362306a36Sopenharmony_ci * Reflink, deduplication 2462306a36Sopenharmony_ci * Scrub (on-line checksum verification) 2562306a36Sopenharmony_ci * Hierarchical quota groups (subvolume and snapshot support) 2662306a36Sopenharmony_ci * Integrated multiple device support, with several raid algorithms 2762306a36Sopenharmony_ci * Offline filesystem check 2862306a36Sopenharmony_ci * Efficient incremental backup and FS mirroring (send/receive) 2962306a36Sopenharmony_ci * Trim/discard 3062306a36Sopenharmony_ci * Online filesystem defragmentation 3162306a36Sopenharmony_ci * Swapfile support 3262306a36Sopenharmony_ci * Zoned mode 3362306a36Sopenharmony_ci * Read/write metadata verification 3462306a36Sopenharmony_ci * Online resize (shrink, grow) 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ciFor more information please refer to the documentation site or wiki 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ci https://btrfs.readthedocs.io 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_cithat maintains information about administration tasks, frequently asked 4262306a36Sopenharmony_ciquestions, use cases, mount options, comprehensible changelogs, features, 4362306a36Sopenharmony_cimanual pages, source code repositories, contacts etc. 44