iAnywhere.com - Locating a server

Locating a server

In the next step towards establishing a connection, Adaptive Server Anywhere attempts to locate a server. If the connection parameter list includes a server name (EngineName (ENG) connection parameter), it carries out a search for a server of that name. If no EngineName (ENG) connection parameter is supplied, and LINKS is not specified or LINKS includes Shared Memory, Adaptive Server Anywhere looks for a default server.

Flowchart of Adaptive Server Anywhere attempting to start a personal server.

If Adaptive Server Anywhere locates a server, it tries to locate or load the required database on that server.

For information, see Locating the database.

If Adaptive Server Anywhere cannot locate a server, it may attempt to start a personal server, depending on the connection parameters.

Notes

For local connections, locating a server is simple. For connections over a network, you can use the CommLinks (LINKS) connection parameter to tune the search in many ways by supplying network protocol options.
The network search involves a search over one or more of the protocols supported by Adaptive Server Anywhere. For each protocol, the network library starts a single port. All connections over that protocol at any one time use a single port.
You can specify a set of network protocol options for each network port in the argument to the CommLinks (LINKS) connection parameter.
Each attempt to locate a server involves two steps. First, Adaptive Server Anywhere looks in the server name cache to see if a server of that name is available (this step is skipped if the value of DoBroadcast is none). Second, it uses the available connection parameters to attempt a connection.
If the server is autostarted, information from the START, DBF, DBKEY, DBS, DBN, ENG, and AUTOSTOP connection parameters are used to construct the options for the autostarted server.