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(Compression was recently added)
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* Object level mirroring and striping
 
* Object level mirroring and striping
 
* Checksums on data and metadata (multiple algorithms available)
 
* Checksums on data and metadata (multiple algorithms available)
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* Compression
 
* Integrated multiple device support, with several raid algorithms
 
* Integrated multiple device support, with several raid algorithms
 
* Online filesystem check
 
* Online filesystem check

Revision as of 05:57, 6 November 2008

Contents

Btrfs

Btrfs is a new copy on write filesystem for Linux aimed at implementing advanced features while focusing on fault tolerance, repair and easy administration. Initially developed by Oracle, Btrfs is licensed under the GPL and open for contribution from anyone.

Linux has a wealth of filesystems to choose from, 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.

Btrfs is under heavy development, and is not suitable for any uses other than benchmarking and review. The Btrfs disk format is not yet finalized.

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
  • Integrated multiple device support, with several raid algorithms
  • Online filesystem check
  • Very fast offline filesystem check
  • Efficient incremental backup and FS mirroring
  • Online filesystem defragmentation

Currently the code is in an early implementation phase, and not all of these have yet been implemented. See the Development timeline for detailed release plans.

News

  • v0.16 Released (Aug, 2008) Changelog
  • v0.15 Released (May 29, 2008)
  • v0.14 Released (April 30, 2008)
  • v0.13 Released

Documentation

Mailing List

Download

Benchmarking

Planning

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