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