Main Page
Btrfs is a modern copy on write (COW) filesystem for Linux aimed at implementing advanced features while also focusing on fault tolerance, repair and easy administration. Its main features and benefits are:
- Snapshots which do not make the full copy of files
- RAID - support for software-based RAID 0, RAID 1, RAID 10, ...
- Self-healing - checksums for data and metadata, automatic detection of silent data corruptions
Development of Btrfs started in 2007. Since that time it's been part of the Linux kernel and is under active development.
Jointly developed by multiple companies (https://btrfs.readthedocs.io/en/latest/Contributors.html, Btrfs is licensed under the GPL and open for contribution from anyone.
Development and Issue ReportingFor feature status, please refer to the Status page. The Btrfs code base is stable. However, new features are still under development. Every effort is made to ensure that it remains stable and fast at each and every commit. This rapid pace of development means that the filesystem improves noticeably with every new Linux release so it's highly recommended that users run the most modern kernel possible. For benchmarks, it's recommended to test the latest stable Linux version, and not any older, as well as the latest Linux development versions. Also, it's recommended to test the various mount options such as different compression options. If you find any behavior you suspect to be caused by a bug, performance issues, or have any questions about using Btrfs, please email the Btrfs mailing list (no subscription required). Please report bugs on Bugzilla. FeaturesLinux has a wealth of filesystems from which to choose, but we are facing a number of challenges with scaling to the large storage subsystems that are becoming common in today's data centers. Filesystems need to scale in their ability to address and manage large storage, and also in their ability to detect, repair and tolerate errors in the data stored on disk. Major Features Currently Implemented
Features by kernel version
Documentation
DocumentationGuides and usage information
Manual pages
Developer documentation
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Newsbtrfs-progs v6.1.3 (Jan 2023)
linux v6.1 (Jan 2023)
ChangelogChangelogs and other related information are also tracked at https://btrfs.readthedocs.io:
Source code downloadBtrfs source repositories describes purpose and contents, here are a few quick links:
Articles, presentations, podcasts
Historical resourcesLinks to old or obsolete documentation, articles. Kept for historical reasons. Stuff that's more than 3 years old. Articles, presentations, podcasts
Project information/Contact
Wiki accounts, editingThe wiki is still in use, however the main portion of documenation is being migrated to https://btrfs.readthedocs.io. Wiki edits and fixups are welcome and may be copied to the RTD documentation eventually. Please create an account and wait for approval (this is a necessary spam protection and we cannot remove it). You can try to catch some of the wiki admins on IRC (or ping user 'kdave' in a query) to expedite the account creation. The registration requires full name for account but it's not mandatory from our perspective. The wiki User and User talk pages are created automatically but removed after account is approved. If you want to use the pages, create them manually, they won't be deleted. |