Btrfs vs. Ext4
What is Btrfs?
Btrfs, which can be pronounced as “Butter FS”, “Better FS”, or “B-Tree FS”, is a file system made completely from scratch. Btrfs exists because the developers wanted to expand the functionality of a file system to include pooling, snapshots, and check-sums among other things.
What is Ext4?
Ext4 is the evolution of the most used Linux file system, Ext3. In many ways, Ext4 is a deeper improvement over Ext3 than Ext3 was over Ext2. Ext3 was mostly about adding journaling to Ext2, but Ext4 modifies important data structures of the file system such as the ones destined to store the file data. The result is a filesystem with an improved design, better performance, reliability, and features.