OpenSolaris is derived from the Unix System V Release 4 codebase. It demands more resources comparing to other popular Linux distros. It runs slow on a VMware player with 512MB allocated. Hardware support is not so good. Some small tools are not so stable. Chinese IME comes handy. Features: Solaris Zones. Provide the ability to partition a machine into numerous virtual machines, each of which is isolated from the others. DTrace . A comprehensive dynamic tracing tool for investigating system behavior, safely on production machines. New IP stack. Providing vastly increased performance. ZFS. A 128-bit, state-of-the-art file system, with end-to-end error checking and correction, a simple command-line interface, and virtually limitless storage capacity.