What is btrfs subvolume?

A subvolume is a part of filesystem with its own independent file/directory hierarchy. Subvolumes can share file extents. A snapshot is also subvolume, but with a given initial content of the original subvolume.

Is btrfs faster than ext4?

For pure data storage, however, the btrfs is the winner over the ext4, but time still will tell. Till the moment, the ext4 seems to be a better choice on the desktop system since it is presented as a default file system, as well as it is faster than the btrfs when transferring files.

Is btrfs a CoW?

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. Jointly developed at multiple companies, Btrfs is licensed under the GPL and open for contribution from anyone.

Is btrfs unstable?

Btrfs is reliable and stable – when you’re running it on a single disk. That’s what tends to the default mode for operating system installs that use Btrfs.

Does Btrfs need a Subvolume?

A Btrfs filesystem has a default subvolume, which is initially set to be the top-level subvolume and which is mounted if no subvol or subvolid option is specified.

How do you make Btrfs subvolume?

Creating Btrfs Subvolumes A Btrfs subvolume is just like a directory in your Btrfs filesystem. So, you need to specify a directory path to create a Btrfs subvolume in that directory path. The path must point to a Btrfs filesystem where you want to create the subvolume. A Btrfs subvolume /data/photos should be created.

How do I check my Btrfs subvolume?

btrfs subvolume utilities

1. Create a btrfs subvolume. Use the btrfs subvolume create command to create a subvolume.
2. View btrfs subvolumes. Use the btrfs subvolume list command to view only the subvolumes in a Btrfs file system, as in this example:
3. Create btrfs subvolume snapshots.

How do you create a root Subvolume?

How to subvolume a btrfs root partition after installation?

1. load an arch live cd.
2. mount /dev/sda2 on to /mnt.
3. create subvolumes (btrfs subvolume create ROOT.
4. umount /dev/sda2.
5. mount -o noatime,ssd,compress=lzo,subvol=ROOT /dev/sda1/ /mnt.
6. cd /mnt.
7. btrfs subvolume create home.
8. btrfs subvolume create root.

Is Btrfs good for SSD?

Btrfs’s performance improves with use of ssd. Btrfs is SSD-aware and exploits TRIM/Discard to allow the file system to report unused blocks to the storage device for reuse. On SSDs, Btrfs avoids unnecessary seek optimization and aggressively sends writes in clusters, even if they are from unrelated files.

Who uses Btrfs?

The following companies use Btrfs in production: Facebook (testing in production as of 2014/04, deployed on millions of servers as of 2018/10) Jolla (smartphone) Lavu (iPad point of sale solution.

Is Btrfs slower?

Btrfs with its CoW design tends to perform slower in the database tests than others, but these days when running multiple SQLite tests concurrently it is fairing much better than in the past.

Should I use Btrfs or XFS?

Advantages of Btrfs over XFS The Btrfs filesystem is a modern Copy-on-Write (CoW) filesystem designed for high-capacity and high-performance storage servers. XFS is also a high-performance 64-bit journaling filesystem that is also capable of parallel I/O operations.

Why is Btrfs so good?

The maximum partition size of a btrfs file system is 16 exbibytes, and the maximum file size is also 16 exbibytes. Considering that btrfs will be able to span over multiple hard drives, it’s a good thing that it supports 16 times more drive space than ext4.

Is Btrfs abandoned?

Red Hat will not be moving Btrfs to a fully supported feature and it will be removed in a future major release of Red Hat Enterprise Linux. The Btrfs file system did receive numerous updates from the upstream in Red Hat Enterprise Linux 7.4 and will remain available in the Red Hat Enterprise Linux 7 series.