Logical Servers
Logical server technology is a mechanism to reduce software costs by limiting the number of sockets on a large, multi-socket server that is used by an application. Hardware vendors offer servers with a large number of sockets along with system administration software, which allow the segregation of groups of sockets into logical servers. This means that a single physical server may be configured to work as several logical servers. For example, a 6-socket server could be configured into three logical servers with two sockets each. Each group of two sockets functions as a separate server, even though all sockets are in the same physical machine.
ESRI recognizes logical server configurations and licenses them as if they were physically separate servers. Under ESRI's license, a separate server license is required to install the software on additional logical servers, just as would be required on additional physical servers. ESRI's licensing applies equally to servers that are physically separate machines and logical servers on larger multi-processor machines. In the example above, if only one of these two socket (processor) logical servers is running ArcGIS Server Enterprise Advanced, an ArcGIS Server Enterprise Advanced two socket license would be required. The remaining four sockets (processors) do not need to be licensed, as they will not be used to run ArcGIS Server.
