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Does btrfs take up more space?
Chunk allocation: BTRFS allocates space for your data in chunks. Multiple devices: BTRFS supports multiple devices working together, RAID-style. That means there’s extra information to store for every file. For example, RAID-1 stores two copies of every file, so a 50MB file takes 100MB of space.
How do you clean up btrfs?
Removing btrfs snapshots (created by apt-btrfs-snapshot) To list all the snapshots in a btrfs file system the following command can be used: $ sudo btrfs subvolume list -s / . Using -s only snapshot subvolumes in the filesystem will be listed.
Does btrfs need swap?
btrfs filesystem doesn’t let to create snapshots if there is a working swap file on the subvolume. That means that it is highly recommended to place a swap file on a separate subvolume.
How are files divided in a Btrfs drive?
A traditional filesystem is divided into files and free space. It is easy to calculate how much space is used or free: Btrfs combines LVM, RAID and a filesystem. The drive is divided into subvolumes, each dynamically sized and replicated: The diagram shows the partition being divided into two subvolumes and metadata.
Why is Btrfs not able to remove a file?
Most likely, you’re running into a problem where BTRFS has to allocate a bit of metadata before it can remove the file. One of BTRFS’s weak spots is its handling of the out-of-space condition; improving behavior in this area is one of the project’s priorities.
What’s the difference between Btrfs and missing free space?
The difference between total and used (around 15 GB) is your missing space. As you can see, it has already been allocated for metadata blocks. I only have hobby experience with btrfs, but I don’t think a ext4 conversion is the best way to create a well laid out btrfs filesystem.
How to free up data blocks in Btrfs?
If the output had shown that the metadata were actually full ( used value close to total ), then the solution would be to try and free up almost empty (<5% used) data blocks using the command btrfs balance start -dusage=5 /. These free blocks could then be reused to store metadata.