Hi
http://www.h-online.com/open/news/item/Btrfs-and-new-file-system-structur...
"The members of the Fedora Engineering Steering Committee (FESCo), who
decide on the technical development aspects of Fedora, have accepted a
range of new features proposed by developers for version 17 of the Linux
distribution. As things currently stand, the project plans to make
another attempt to switch to using Btrfs as its default file system in
this version, scheduled for release in May 2012."
Rahul