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Oracle Fusion Middleware Deployment Planning Guide for Oracle Unified Directory 11g Release 1 (11.1.1)
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Document Information


1.  Overview of Oracle Unified Directory

2.  Overview of the Directory Server

3.  Overview of the Proxy Server

4.  Overview of the Replication Gateway

5.  Building Blocks of the Proxy Server

Load Balancing Using the Proxy

Failover Load Balancing

Optimal Load Balancing

Proportional Load Balancing

Saturation Load Balancing

Search Filter Load Balancing

Data Distribution Using the Proxy

Numeric Distribution

Lexico Distribution

Capacity Distribution

DN Pattern Distribution

Global Index Catalog

DN Renaming Using the Proxy

How the DN Renaming Workflow Element Works

6.  Example Deployments Using the Directory Server

7.  Example Deployments Using the Proxy Server

8.  Simple Proxy Deployments Using the Command Line Interface

9.  Deploying Advanced Proxy Architectures

DN Renaming Using the Proxy

Each entry in a directory is identified by a DN and a set of attributes and their values. Sometimes, the DN and the attributes defined on the client side does not map with the DN and the attributes defined on the server side. For instance, an organization, Example A contains dc=parentcompany, dc=com entries. It acquires another organization, Example B. Example B contains dc=newcompany, dc=com entries. Therefore, dc=newcompany, dc=com must be renamed into dc=parentcompany, dc=com for the existing client application to work accurately.

The DN renaming workflow elements can be defined to rename DNs to values that match the server side. When a client makes a request, the DNs and attributes are renamed to match the server side. When the result is returned to a client, the DN and attributes are changed back to match the client side.

How the DN Renaming Workflow Element Works

Oracle Unified Directory proxy offers DN renaming workflow element that allows you to transform the content of a Directory Information Tree (DIT) into another DIT with a different base DN. When an operation (Add, Bind, Delete, Modify, and so on) goes through a DN renaming workflow element, its parameters are transformed according to the DN renaming configuration to transform the virtual entries into real entries.

Figure 5-12 illustrates how DN renaming is performed using the Oracle Unified Directory proxy.

Figure 5-12 DN Renaming

DN renaming

The client expects ou=myorg, dc=server, dc=com entries. However, the LDAP server contains ou=people, dc=server, dc=com entries. The Oracle Unified Directory proxy renames the DNs by making use of the DN renaming workflow element.

In this example, the real entries ou=people, dc=server, dc=com are seen as ou=myorg, dc=server, dc=com entries from the client side.

The DN renaming transformation is applicable to the following objects:

Note - You can apply the transformation to all the user attributes of the entries, define a restricted list of attributes to which the operation applies, or define a restricted list of attributes to which the operation does not apply.