LinuxLinks.com
Newbies What Next ? News Forums Calendar

Search





News Sections
Home
General News (3973/0)
Reviews (628/0)
Press Releases (464/0)
Distributions (187/0)
Software (882/2)
Hardware (522/0)
Security (192/0)
Tutorials (345/0)
Off Topic (181/1)


User Functions
Username:

Password:

Don't have an account yet? Sign up as a New User


Events
There are no upcoming events




Btrfs

Btrfs

Btrfs (B-Tree File System) is a Copy on Write file system for Linux. Copy On Write (COW) is an optimization technique for maintaining a copy of a collection of data, handling resources when multiple tasks are using the same data.

The aim of this journaling file system is to bring more efficient storage management and better data integrity features to Linux.

Btrfs is notable for implementing advanced features whilst maintaining fault tolerance, scalability and reliability. The file system has been in development since 2007 and its code base has now reached a level of maturity that its disk format should not change. The code base is under heavy development.

Btrfs debuted in the Linux 2.6.29 released. Btrfs can handle up to 2 64 inodes, less a few hundred for special items.

 Btrfs

Price
Free to download

License

GNU GPL

Developer
Oracle Corporation

Website
btrfs.wiki.kernel.org

System Requirements

Support Sites:
A Beginner's Guide to Btrfs, How I Use the Advanced Capabilities of Btrfs, Getting Started with the Btrfs File System

Selected Reviews:
Josef Bacik

Features include:

  • Scalable, 64-bit file system that can span large volumes to provide files and file systems as large as 16 exabytes
  • Integrated volume management
  • Online file system defragmentation - defragging can occur while the drive is mounted or online
  • Offline filesystem check
  • Online volume growth and shrinking
  • Online block device addition and removal
  • Online balancing (movement of objects between block devices to balance load)
  • Offline filesystem check
  • Uses a B-tree structure to store data types and point to information stored on disk
  • Online data scrubbing for finding errors and automatically fixing them for files with redundant copies
  • Delayed allocation to allow for better disk allocation
    • Space-efficient packing of small files
    • Space-efficient indexed directories
  • Subvolumes (separate internal filesystem roots)
  • Transparent compression (zlib and LZO)
  • Simple to use writable snapshots, read-only snapshots. Snapshots show up as normal directories under the snapshotted directory
  • Send/receive (saving diffs between snapshots to a binary stream)
  • Data integrity:
    • Built-in RAID support (RAID0, RAID1, RAID5, RAID6 and RAID10). Data scrubbing can be used, particularly with RAID 1
    • Fault isolation and checksum algorithms - fault isolation is achieved by storing metadata separately from user data
    • Checksums on data and all metadata (CRC-32C). Option to turn off data checksumming
    • Even on a single device, metadata is duplicated and maintained in two locations for redundancy
    • Rebuild times
    • Encryption
  • File cloning (copy-on-write on individual files, or byte ranges thereof)
  • In-place conversion (with rollback) from ext3/4 to Btrfs
  • File system seeding
  • SSD (Flash storage) awareness (TRIM/Discard for reporting free blocks for reuse) and optimizations
  • File Striping, File Mirroring, File Striping+Mirroring, Striping with Single and Dual Parity implementations
  • Hierarchical per-subvolume quota
  • Extent based file storage
  • Provides minimal user tuning to guard against misuse

Return to Journaling File Systems Home Page

Bookmark and Share


Last Updated Monday, May 05 2014 @ 03:10 AM EDT


We have written a range of guides highlighting excellent free books for popular programming languages. Check out the following guides: C, C++, C#, Java, JavaScript, CoffeeScript, HTML, Python, Ruby, Perl, Haskell, PHP, Lisp, R, Prolog, Scala, Scheme, Forth, SQL, Node.js (new), Fortran (new), Erlang (new), Pascal (new), and Ada (new).


Group Tests
All Group Tests

Top Free Software
5 Office Suites
7 Document Processors
6 Lean Desktops
6 Desktop Search
9 Project Management
9 Groupware Apps
14 File Managers
10 Databases
21 Backup Tools
21 DVD Tools
21 Window Managers
21 Productivity Tools
9 Terminal Emulators
21 Financial Tools
21 Text Editors
21 Video Emulators
21 Home Emulators
42 Graphics Apps
6 CAD Apps
42 Scientific Apps
10 Web Browsers
42 Email Apps
12 Instant Messaging
10 IRC Clients
7 Twitter Clients
12 News Aggregators
11 VoIP Apps
11 Remote Display Apps
42 Best Games
42 More Games
21 More Games
21 Notable Games (1)
21 Notable Games (2)
21 Notable Games (3)
8 ASCII Games
9 Educational Games
42 Audio Apps
42 Video Apps
6 Screencasting Apps
80 Security Apps
9 System Monitoring
6 Family History Apps
11 PDF Tools
6 Music Servers
6 Collection Managers
7 Calculator Apps
8 Geometry Apps
Free Console Apps
14 Multimedia
Programming
8 Compilers
9 IDEs
9 Debuggers
7 Revision Control Apps
6 Doc Generators
'Free' Proprietary
21 Closed-Source Apps
Top Commercial Apps
42 Games
Free Web Software
21 Web CMS
14 Wiki Engines
8 Blog Apps
6 eCommerce Apps
5 Human Resource Apps
10 ERP
10 CRM
6 Data Warehouse Apps
8 Business Intelligence
6 Point-of-Sale

All Group Tests

Other Articles
Migrating from Windows
Back up your data
Distribution Guide
Distro Portal Pages
20 Free Linux Books
Running Linux Under Windows


Older Stories
Sunday 08/31
  • Low-Spec Hardware? Try these Desktop Environments (0)

  • Monday 08/25
  • Powerful Command-line File Transfer Programs (0)

  • Saturday 08/16
  • Great Apps to Take Notes (0)

  • Sunday 08/10
  • Exciting New Terminal Emulators (0)

  • Saturday 08/02
  • The Best Lightweight Graphical Email Clients (0)

  • Sunday 07/20
  • Excellent Free Distraction-Free Tools for Writers (0)
  • Pick of the Bunch: Console Internet Applications (0)
  • Mobile Phone Management Made Easy (0)

  • Saturday 06/28
  • Easy File Comparisons With These Great Free Diff Tools (0)
  • 9 ASCII Games You'll Want to Play Again and Again (0)


  • Vote

    What do you find MOST attractive about Open Source software?

    Amount of customization
    Security
    Freedom provided
    Speed of development
    Quality
    Multiple versions
    Cost
    Potential to contribute
    Ability to modify code
    Results
    4872 votes | 2 comments

    Built with GeekLog and phpBB
    Comments to the webmaster are welcome
    Copyright 2009 LinuxLinks.com - All rights reserved