The Directory Server supports attribute indexing in the Changelog Backend to allow Get Changelog Batch requests to filter results that include only changes involving specific attributes. Normally, the directory server that receives a request must iterate over the whole range of changelog entries and then match entries based on search criteria for inclusion in the batch. The majority of this processing also involves determining whether the changelog entry includes changes to a particular attribute or set of attributes, or not. Using changelog indexing, client applications can dramatically speed up throughput when targeting the specific attributes.

Administrators can configure attribute indexing using the index-include-attribute and index-exclude-attribute properties on the Changelog Backend. The properties can accept the specific attribute name or special LDAP values "*" to specify all user attributes or "+" to specify all operational attributes.

To determine if the directory server supports this feature, administrators can view the Root DSE for the following entry: