特殊:Badtitle/NS100:Btrfs

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English {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/af | • {{#if: UbuntuHelp:btrfs|Afrikaans| [[::Btrfs/af|Afrikaans]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/ar | • {{#if: UbuntuHelp:btrfs|العربية| [[::Btrfs/ar|العربية]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/az | • {{#if: UbuntuHelp:btrfs|azərbaycanca| [[::Btrfs/az|azərbaycanca]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/bcc | • {{#if: UbuntuHelp:btrfs|جهلسری بلوچی| [[::Btrfs/bcc|جهلسری بلوچی]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/bg | • {{#if: UbuntuHelp:btrfs|български| [[::Btrfs/bg|български]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/br | • {{#if: UbuntuHelp:btrfs|brezhoneg| [[::Btrfs/br|brezhoneg]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/ca | • 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:}}Btrfs}}/fr | • {{#if: UbuntuHelp:btrfs|français| [[::Btrfs/fr|français]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/gu | • {{#if: UbuntuHelp:btrfs|ગુજરાતી| [[::Btrfs/gu|ગુજરાતી]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/he | • {{#if: UbuntuHelp:btrfs|עברית| [[::Btrfs/he|עברית]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/hu | • {{#if: UbuntuHelp:btrfs|magyar| [[::Btrfs/hu|magyar]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/id | • {{#if: UbuntuHelp:btrfs|Bahasa Indonesia| [[::Btrfs/id|Bahasa Indonesia]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/it | • {{#if: UbuntuHelp:btrfs|italiano| [[::Btrfs/it|italiano]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/ja | • {{#if: UbuntuHelp:btrfs|日本語| [[::Btrfs/ja|日本語]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/ko | • {{#if: UbuntuHelp:btrfs|한국어| [[::Btrfs/ko|한국어]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/ksh | • {{#if: UbuntuHelp:btrfs|Ripoarisch| [[::Btrfs/ksh|Ripoarisch]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/mr | • {{#if: UbuntuHelp:btrfs|मराठी| [[::Btrfs/mr|मराठी]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/ms | • {{#if: UbuntuHelp:btrfs|Bahasa Melayu| [[::Btrfs/ms|Bahasa Melayu]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/nl | • {{#if: UbuntuHelp:btrfs|Nederlands| [[::Btrfs/nl|Nederlands]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/no | • {{#if: UbuntuHelp:btrfs|norsk| [[::Btrfs/no|norsk]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/oc | • {{#if: UbuntuHelp:btrfs|occitan| [[::Btrfs/oc|occitan]]}}|}} {{#ifexist: 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[[::Btrfs/zh-hans|中文（简体）]]}}|}} {{#ifexist: {{#if: UbuntuHelp:btrfs | UbuntuHelp:btrfs | {{#if: | :}}Btrfs}}/zh-hant | • {{#if: UbuntuHelp:btrfs|中文（繁體）| [[::Btrfs/zh-hant|中文（繁體）]]}}|}}

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What is btrfs

Basic description of btrfs. Strengths, weaknesses, why is this important, etc.

Features:

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

How to install

Ubuntu 8.10 Intrepid

PPA deb packages

[1] Lines for sources.list.d:

deb http://ppa.launchpad.net/brcha/ppa/ubuntu intrepid main
deb-src http://ppa.launchpad.net/brcha/ppa/ubuntu intrepid main

Add the GPG key:

sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 17f547c39c5c4071e254d0a7313d312748a22a95

Download module source and btrfs tools:

sudo apt-get install btrfs btrfs-progs module-assistant

Build and install kernel module:

sudo module-assistant auto-install btrfs
sudo modprobe btrfs

Compile from Source

NOT ACTUALLY WORKING YET btrfs wiki getting started page

Kernel Module Dependencies

8.10 Kernel 2.6.27-9-generic

CONFIG_LIBCRC32C=m
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=m
build-essential: make, compiler, etc
linux-headers-2.6.27-9-generic: latest kernel headers

sudo apt-get install build-essential linux-headers-2.6.27-9-generic

Patch: [2] Download, patch and compile code:

wget http://www.kernel.org/pub/linux/kernel/people/mason/btrfs/btrfs-0.17.tar.bz2
tar -jxvf btrfs-0.17.tar.bz2
cd btrfs-0.17
#apply patch
make

Currently btrfs does not work with kernel 2.6.27 Ensure modules are up and running, and insert btrfs module into kernel.

sudo modprobe libcrc32c zlib_inflate zlib_deflate
sudo insmod btrfs.ko

btrfs progs dependencies

sudo apt-get install e2fsprogs uuid-dev

wget http://www.kernel.org/pub/linux/kernel/people/mason/btrfs/btrfs-progs-0.17.tar.bz2
tar -jxvf btrfs-progs-0.17.tar.bz2
make

btrfs-progs compile fine

Ubuntu 9.04 Jaunty

TBD

How to use

How to format disk as btrfs
How to grow/shrink file system
How to create snapshots
How to access snapshots
How to convert ext2/3(/4?) partitions to btrfs
How to create an image of a btrfs file system
How to restore from an image of a btrfs file system
How to recover from a failed device
How to add another device to file system

[[category:Category:Documentation btrfs wiki documentation category]]

Troubleshooting

Alternatives

Tux3?
ZFS over Fuse?
Hammer FS (DragonFly BSD)

Links