Chapter 2 Introduction to the Repository

Understanding Client/Server components

Server

The server is at the center of your application. It stores the repository tables that gather information. A relational database management system (RDBMS) manages information in the repository. You can access the repository from a client via an ODBC driver or via the repository proxy.

Client

The client can either:

• make requests via ODBC to the server for consolidation (sending documents to the repository) and extraction (retrieving documents from the repository). The PowerDesigner repository and other modules, the ODBC drivers and the database client are installed on the every client workstations from which they can access the database on the server.
  
  or
• make requests via the proxy to the server for consolidation (sending documents to the repository) and extraction (retrieving documents from the repository). Only the PowerDesigner repository and other modules are installed on the client workstations. The client access the database on the server via the proxy which is installed on he same computer as the database or at least on the same LAN.

Before using the repository, you have to install the database server and clients. To setup your environment you can use Sybase Adaptive Server Anywhere delivered with PowerDesigner or an external database.

For more information about the installation of Sybase Adaptive Server Anywhere, see part 2 of this manual, Installing Sybase Adaptive Server Anywhere.

Before using the proxy, you have to install it on he same computer as the database or at least on the same LAN.

For more information about the installation of the proxy, see the Using the Repository Proxy chapter.

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