thk writes "Sistina, the main developer of the Global File System, has changed its license from GPL to SPL (Sistina Public License). SPL is basically a free-for-non-profit-use license. Interestingly, the change came just after beta testing, leaving some users a bit miffed. The GFS is an important component of some GPL clustering projects, such as Compaq's SSIC project. The Sistina press release is here."