Within an Adaptive Server, outgoing RPCs are transmitted by means of a site handler, which multiplexes multiple requests through a single physical connection to a remote server. The RPC is handled as part of a multistep operation:
Establish connection – The Adaptive Server site handler establishes a single physical connection to the remote server. Each RPC requires that a logical connection be established over this physical connection. The logical connection is routed through the site handler of the intended remote server.
The connection validation process for these connect requests is different than that of normal client connections. First, the remote server must determine if the server from which the connect request originated is configured in its sysservers table. If so, then the system table sysremotelogins is checked to determine how the connect request should be handled. If trusted mode is configured, password checking is not performed. (For more information about trusted mode, see “Trusted Mode” on page 2-32.)
Transmit the RPC – The RPC request is transmitted over the logical connection.
Process results – All results from the RPC are relayed from the logical connection to the client.
Disconnect – The logical connection is terminated.
Because of the logical connect and disconnect steps, site handler RPCs can be slow.