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Simulator, which can mean either:

  • Sim node (or sim host), the physical server machine simulating one or more regions.
  • Sim processes, the processes running on the server machines that simulate regions.

The latter usage is more precise, because multiple processes may run on a single server CPU. In common usage, "sim" may also be used to mean region, though this meaning is deprecated because it is ambiguous. Most accurately, a region is simulated by a sim process running on a sim node.

Definitions by Lil Linden

From the Beta Server Office Hours 2010.02.12:

  • Sim means sim host, or the hardware
  • Simulator is the binary that runs on the sim hosts
  • Regions run in the simulator