The advanced Butter/Better/B-tree Filesystem, Btrfs, is still labeled as experimental. Most distros include Btrfs, and Btrfs has been included in mainline Linux kernels since the 2.6.29 kernel. To use it just install the user-space tools. So what's the story, is it ready for prime time or not?
Btrfs is Ready
Matthias Eckermann, senior product manager at SUSE Enterprise Linux, says that Btrfs is ready for production systems, and as of SUSE Linux Enterprise 11 SP2 Btrfs is officially supported, along with Ext3, ReiserFS, XFS and OCFS2 (Oracle cluster filesystem for Linux).
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