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Oracle Directory Server Enterprise Edition Administration Guide 11g Release 1 (11.1.1.5.0) |
Part I Directory Server Administration
2. Directory Server Instances and Suffixes
3. Directory Server Configuration
6. Directory Server Access Control
7. Directory Server Password Policy
8. Directory Server Backup and Restore
9. Directory Server Groups, Roles, and CoS
10. Directory Server Replication
13. Directory Server Attribute Value Uniqueness
Enforcing Uniqueness of the uid and Other Attributes
To Enforce Uniqueness of the uid Attribute
To Enforce Uniqueness of Another Attribute
Using the Uniqueness Plug-In With Replication
Single-Master Replication Scenario
Multimaster Replication Scenario
15. Directory Server Monitoring
Part II Directory Proxy Server Administration
16. Directory Proxy Server Tools
17. Directory Proxy Server Instances
19. Directory Proxy Server Certificates
20. Directory Proxy Server Load Balancing and Client Affinity
21. Directory Proxy Server Distribution
22. Directory Proxy Server Virtualization
23. Virtual Data Transformations
24. Connections Between Directory Proxy Server and Back-End LDAP Servers
25. Connections Between Clients and Directory Proxy Server
26. Directory Proxy Server Client Authentication
27. Directory Proxy Server Logging
28. Directory Proxy Server Monitoring and Alerts
Part III Directory Service Control Center Administration
The UID uniqueness plug-in is a pre-operation plug-in. It checks LDAP add, modify, and modify DN operations before the server performs an update of the directory. The plug-in determines whether the operation will cause two entries to have the same attribute value. If so, the server terminates the operation and returns error 19 LDAP_CONSTRAINT_VIOLATION to the client.
You can configure the plug-in to enforce uniqueness in one or more subtrees in the directory or among entries of a specific object class. This configuration determines the set of entries for which unique attribute values is enforced.
You can define several instances of the UID uniqueness plug-in if you want to enforce the uniqueness of other attributes. Define one plug-in instance for each attribute whose value must be unique. You can also have several plug-in instances for the same attribute to enforce “separate” uniqueness in several sets of entries. A given attribute value is allowed only once in each set of subtrees.
When you enable attribute uniqueness on an existing directory, the server does not check for uniqueness among existing entries. Uniqueness is only enforced when an entry is added or when the attribute is added or modified.
By default, the UID uniqueness plug-in is disabled because the plug-in affects multimaster replication. You can enable the UID uniqueness plug-in when using replication, but you should be aware of the behavior described in Using the Uniqueness Plug-In With Replication.