Progress
Installation and Configuration Guide
Version 9
for UNIX


NameServers

A NameServer is a single process that mediates client connections for a set of Unified Brokers that have registered with it. Any number and type of Unified Broker instance can register with a single NameServer, and each Unified Broker instance can register with exactly one NameServer. The NameServer that a broker instance registers with is the broker’s controlling NameServer.

NOTE: The NameServer is an optional component that you can use to support these servers: Progress AppServer, SonicMQ Adapter, WebSpeed, and DataServer products. However, since Progress provides the NameServer by default, the information and graphics throughout this chapter assume you are using the NameServer. For specific information about the optional usage of the NameServer, see your product documentation.

When a Unified Broker instance starts up, it registers with its controlling NameServer by sending its location and other configuration information to help resolve a connection request for the broker. Part of this registration information is the Application Service that the Unified Broker supports. An Application Service is a designation for the particular business function that a Unified Broker provides. For more information on Application Services, see the "Unified Broker" section.

NameServers provide the following services for a Unified Broker product:

These NameServer services are available to the following servers: AppServer, WebSpeed Transaction Server, Sonic Adapter, and DataServer products. Also, all communications with the NameServer use User Datagram Protocol (UDP). The default configuration is to use the NameServer. However, the NameServer is an option feature. If you elect not to use NameServer for any of these servers, these features are not available.

For more information on how your Unified Broker product uses NameServers, see your product documentation.


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