Server

You can install two types of servers: the full directory server and the proxy server. You can install both types of directory servers on one computer and create one or more instances of the types of directory servers you have installed. These are called directory server instances. Each directory server instance can function either as a proxy server or full directory server, but not both.

A Tivoli Directory Server 6.3 server requires that the version 6.3 C client and the Java client also be installed. In addition, the server can coexist on the same computer with another client of version 6.0, 6.1, or 6.2 or with a version 6.0, 6.1, or 6.2 server.

Proxy server

The proxy server is an LDAP server that acts as a front end to the directory. It authenticates the client with respect to the entire directory and routes requests to full directory servers. This improves performance and provides a unified view of the directory to the client. The proxy server can also be used at the front end of a server cluster or a distributed directory for providing failover and load balancing.

The proxy server is configured with information that allows it to connect to each of the full directory servers for which it is the proxy server. It routes each request to one or more target servers. The proxy server can load balance among target servers that are equally capable of handling an operation; it performs transparent failover to alternate servers if a target server is busy or down.

If the directory data is large and the environment is write-intensive, consider using a proxy server. Large directory environments that are read-heavy might be able to achieve adequate scaling by introducing replication. Before you decide to use a proxy server, refer to the list of supported features within the proxy server in the IBM® Tivoli® Directory Server Version 6.3 Administration Guide. The proxy server supports fewer features than the full directory server.

To install a proxy server, you do not need to have DB2® installed on the computer.

This book contains information about installing a proxy server and creating and configuring a proxy server instance. For additional information about proxy server, including information about setting up a proxy server instance as a proxy for full directory server instances, see the IBM Tivoli Directory Server Version 6.3 Administration Guide.

If you downloaded Tivoli Directory Server 6.3 from Passport Advantage®, you are entitled to use the proxy server. If you obtained Tivoli Directory Server 6.3 from another Web site, you are entitled to use the proxy server for evaluation purposes only. To be entitled to full use of the proxy server, download Tivoli Directory Server 6.3 from the Passport Advantage Web site.

Full directory server

The full directory server is an LDAP server; it is configured with a database instance, and it processes client requests that require accessing entries stored in the database. DB2 is required for a full directory server.