Server Fault
Server Fault

Questions tagged [btrfs]

btrfs is a B-tree based, copy-on-write filesystem for Linux. It's main features include snapshots, checksumming of data and filesystem level RAID support. It's similar to ZFS.

Btrfs tag should be used with all questions referring to usage of features specific to this filesystem:

  • defragmentation
  • resizing and addition and removal of block devices
  • it's RAID implementation
  • snapshot creation and usage

Also see:
for a similar copy-on-write filesystem.
http://btrfs.wiki.kernel.org for detailed information about the filesystem

247 questions
44
votes
5 answers

Ext4 vs. XFS vs. Btrfs vs. ZFS for NAS

My use case: I have Ubuntu Server 18.04 installed on an M.2 SSD. I have a 4TB HDD I want to add as storage. Since it's mostly for large media files and backups, it won't be written to very often. Which filesystem do you think is best suited for this…
Alex Shaw
  • 549
41
votes
6 answers

Does btrfs have an efficient way to compare snapshots?

While diffing mounted snapshots would work, it sounds like it could be horribly slow in many cases. Is there btrfs specific functionality for diffing snapshots? (I was unable to find any in the docs)
Catskul
  • 1,999
35
votes
4 answers

LVM snapshots vs. file system snapshots

As far as I know, LVM makes it possible to take snapshots of a volume. There are also a number of file systems (ZFS, Btrfs, reiserfs, ...) which supports snapshots. However, I've never understood the difference between LVM snapshots and file system…
nip3o
  • 507
24
votes
6 answers

Multi device BTRFS filesystem with disk of different size

I have an existing BTRFS filesystem composed of one 500GB disk and I just bought a 2TB disk to increase the storage capacity of my home server and I want add the new disk to the existing filesystem. From what I read, it seems like no BTRFS setup can…
fokenrute
  • 395
22
votes
8 answers

Do snapshots + RAID count as a good on-site backup solution?

The two main reasons I can think of for taking backups seems to be taken care of when I use both snapshots and RAID together with btrfs. (By RAID here, I mean RAID1 or 10) Accidental deletion of data: Snapshots covers this case Failure of a drive…
小太郎
  • 377
22
votes
7 answers

How does BTRFS compare to ZFS?

I am considering which OS and filesystem to use on some new servers I have and am considering either Free BSD with ZFS, or Linux with BTRFS. The programs I have run on both systems, so the only issue is reliability of the filesystems and…
yazz.com
  • 7,953
21
votes
7 answers

Which filesystem for large LVM of disks (8 TB)?

I have a Linux server with many 2 TB disks, all currently in a LVM resulting in about 10 TB of space. I use all this space on an ext4 partition, and currently have about 8,8 TB of data. Problem is, I often get errors on my disks, and even if I…
alphatiger
  • 221
21
votes
6 answers

Verify TRIM support with BtrFS on SSD

We are looking into using BtrFS on an array of SSD disks and I have been asked to verify that BtrFS does in fact perform TRIM operations upon deleting a file. So far I have been unable to verify that the TRIM command is sent to the disks. I know…
Shane Meyers
  • 1,018
20
votes
4 answers

"rm: can not remove xxx: No Space left on device" on BTRFS

Running OpenSuse 12.2. Suddenly the root parition seems to be full (99%) but I can no longer remove files manually. "rm: can not remove xxx: No Space left on device" although 450mb are still free according to df. The filesystem is BTRFS. I tried…
Andreas Jung
  • 301
18
votes
8 answers

Is btrfs production ready?

I've seen a lot of information on btrfs lately. I have been considering ext4 for my next filesystem, but am tempted by btrfs instead. How widely used is btrfs? What are the pro's and con's?
mdpc
  • 11,914
16
votes
2 answers

How can I remove a drive from a BTRFS RAID 1 setup to make it just a single (BTRFS) drive?

I'm using Ubuntu 10.04 and have the /home directory setup as a BTRFS RAID 1 with two 2TB drives. I'd like to make the /home directory just a single drive; how do I safely go about doing this?
Jamie
  • 1,364
16
votes
5 answers

btrfs-enabled backup solution

With btrfs hitting production in Oracle EL 14th this month (together with working fsck and scrubbing from Linux 3.2) I was thinking of redesigning my current backup solution to utilise it. Note that I'm thinking about doing it for small amounts of…
Alicja Kario
  • 6,449
16
votes
4 answers

Which filesystems offer snapshot functionality for users to recover data?

I'm working on a project that will teach linux to youth. Knowing they will have a tendency to delete or corrupt items in their home directories we are looking for a good snapshot option. We will not have access to fancy tools available from major…
Gray Race
  • 933
13
votes
3 answers

Removing files takes too long

Short version: rm -rf mydir, with mydir (recursively) containing 2.5 million files, takes about 12 hours on a mostly idle machine. More information: Most of the files being deleted are hard links to files in other directories (the directory being…
Antonis Christofides
  • 2,626
12
votes
4 answers

How to find the file at a certain btrfs inode

I have a corrupt file according to btrfs BTRFS info (device sdb1): csum failed ino 367 off 310013952 csum 1601485211 expected csum 3692975992 I assumed ino 367 means inode 367, so I can use find and try to restore the file. However find /path -inum…
user192749
  • 401
1
2 3
…
16 17