User Guide

SAP AG November 2002
WWW
SAP DB WWW
Web Server
Web Tools
SAP DB
HTTP
WWW
SAP DB WWW
Web Server
SAP DB
HTTP
Web Tools
Server A
Server B
Server A
A connection to the client (Web DBM or Web SQL service integrated into the Web Server) is
created by calling the SAP DB Web tool (Web DBM [Page
154] or Web SQL [Page 154]) in
the Web Browser. The communication between the client and the database instance [Page
132] takes place through the DBM Server [Page 58] for the Web DBM tool, and through the
ODBC interface for the Web SQL tool (SQL Studio Architecture [Page 56]).
X Server
The X server (Remote SQL Server) is the communication instance of the SAP DB software
when the individual components are located on different computers.
• Database applications and servers of the SAP DB tools (for example, Loader) address
the X server when they want to establish a connection with a database instance installed
on another computer.
• Clients of the SAP DB tools (for example, Loader) address the X server when they want
to establish a connection with a SAP DB tool server (for example, DBM Server, Loader)
installed on a different computer.
Each time a connection is successfully established, an additional X server instance is started
(Windows: Thread, UNIX: Process). This X server instance is needed to transport the data
packages across the network. When the connection ends, the X server instance is closed.
See also:
Architecture of the Database Manager [Page
54]
Architecture of the SAP DB Loader [Page 55]
DBM Server
The Database Manager Server (DBM Server) is the server part of the Database Manager
[Page 133]. It is installed by the server installation on the database server.
The DBM Server creates the connection to the database instance [Page 132] and can access
its environment using operating system resources.
User Manual: SAP DB 58