So, why am I talking about Btrfs?

• I've been using linux and its different filesystems since 1993

• I've have been using ext2/ext3/ext4 for 20 years.

• But I worked at Network Appliance in 1997, and I've grown hooked to snapshots.

• LVM snapshots never worked well on linux, and have great performance problems (I've seen I/O speed go down to 2MB/s).

• I also like using partitions to separate my filesystems, but LVM partitions are not ideal and add the overhead of using LVM.

• I wanted this badly enough that I switched my laptop to btrfs 2 years ago, and more machines since then.