DragonFly BSD is a free
BsdUnix operating system that started in 2003 as a fork of
FreeBsd 4.8.
DragonFly started over an alternate SMP synchronization strategy than the one FreeBSD 5 ('SMPng') was moving towards - where FreeBSD was splitting the big kernel lock into many small locks,
DragonFly moved many resources to per-CPU pools and used inter-CPU messaging for communication.
DragonFly has gained a number of cool features over the years - a snapshotting filesystem, HAMMER, process checkpointing, virtual kernels.
Its homepage is located, predictably enough, at
http://www.dragonflybsd.org/
CategoryOperatingSystem CategoryUnix