History
The core data structure of Btrfs—the copy-on-write B-tree—was originally proposed by IBM researcher Ohad Rodeh at a presentation at USENIX 2007. Chris Mason, an engineer working on ReiserFS for SUSE at the time, joined Oracle later that year and began work on a new file system based on these B-trees.
Btrfs 1.0 (with finalized on-disk format) was originally slated for a late 2008 release, and was finally accepted into the mainline kernel as of 2.6.29 in 2009. Several Linux distributions began offering Btrfs as an experimental choice of root file system during installation, including Arch Linux, openSUSE 11.3, SLES 11 SP1, Ubuntu 10.10, Sabayon Linux, Red Hat Enterprise Linux 6, Fedora 15, MeeGo, Debian, and Slackware 13.37. SLES 11 SP2 and Oracle Linux 5 and 6, with the Unbreakable Enterprise Kernel Release 2 have moved btrfs from experimental to production/supported.
In 2011, de-fragmentation features were announced for the Linux 3.0 kernel version. Besides Mason at Oracle, Miao Xie at Fujitsu contributed performance improvements.
In June 2012, Chris Mason left Oracle for Fusion-IO ; he continues to work on BTRFS.
Read more about this topic: Btrfs
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