CORBA 2.3.3 Administration Guide (NonStop CORBA 2.3.3+)
With this configuration the single port can be serviced by up to 16 actual processes with only one Comm Server pool and
only one configuration database entry. Similarly, up to 16 Location Service Daemon (LSD) processes can be configured to
avoid a potential LSD bottleneck.
The GIOP over TS/MP protocol can be used in combination with Parallel Library TCP/IP to provide two different
dimensions of scalability. As shown in Figure 18, Parallel Library TCP/IP provides scalability by allowing multiple
processes to listen at one port. If you configure multiple ports (using multiple ServerNet adapters), TS/MP provides
scalability by allowing you to configure one process per port.
For more information about the architecture and features of Parallel Library TCP/IP, see the TCP/IP (Parallel Library)
Configuration and Management Manual, particularly the section on configuring Parallel Library TCP/IP for complex and
heavy-use environments.
Location Service Daemon (LSD)
The Location Service Daemon (LSD) is a component that often acts as a first point of contact for network clients. The LSD
uses NonStop CORBA configuration information along with information in the request to redirect the request to the correct
server or Comm server. Following the initial interaction with the LSD, subsequent client requests should not require
interactions with the LSD. When the LSD determines that a Comm server should handle the request, the LSD selects an
appropriate Comm server. Selection of a Comm server is made based on several factors including:
The IP address of the client making the request●
The number of available Comm servers●
The current load being handled by each Comm server●
Configuration decisions made by the system administrator●
Once an association is made between a particular client IP address and a Comm server, the same association is used for
subsequent requests from the same client.