[PlutoIsAPlanet]

> BTW: Even SLES SuseLinux Enterprise says use XFS for data btrfs just for the OS i wonder why

Because XFS is far quicker for server-related software such as databases and virtual machines, which are weak points on btrfs due to its COW model.

[josephcsible]

Doesn't "chattr +C" give you back that performance, while still letting you keep the rest of the benefits of Btrfs?

[curt15]

Nodatacow is an ugly hack because it disables btrfs's core features for the affected data. It also should not be used with raid1.

[BSDobelix]

Yeah and maybe additionally you want to keep your data and have a stable filesystem for them ;)