In Windows Server 2003 a third main table was added for security descriptor single instancing.

Instancing, the general term for the use of this technique, addresses several problems encountered by players in the shared spaces of virtual worlds.

In real-time computer graphics, geometry instancing is the practice of rendering multiple copies of the same mesh in a scene at once.

The world will not be split in "shards" or servers, but rather play like a massively multiplayer online game with heavy instancing, such as Guild Wars.

Vanguard is set in a high fantasy world called "Telon", unusual among MMO worlds in that it is almost entirely persistent, with no instancing or load screens.

This single instancing gives the server the ability to store only one instance of data, no matter if the data originated from another computer, another file, or even data within the same file.

Partly this is a matter of Mr. Young Bear's relentless instancing of our "cosmic insignificance"; his bullying, Hardyesque deflation of any grandeur, even any consistent patterning of events.

Because the backup operates on data at the cluster level, single instancing can be performed to minimize the amount of data that travels over the network and that will ultimately be stored on the home server.

In response to this article, Raph Koster added that instancing should be limited to situations in which the creation of a "pocket zone" makes sense within the context of the fictional universe - such as the holodeck in the Star Trek franchise.

"Because two actual Beatles and a number of Beatles auxiliary members, Bob Dylan in the flesh, we don't have the Rolling Stones but a very good instancing of Rolling Stones Dionysian sexual rock energy with Leon doing 'Jumpin' Jack Flash.'