By Etienne Remillon on Jan 03, 2013
When it comes to synchronizing between Oracle Directory Server Enterprise Edition (ODSEE) and Oracle Unified Directory (OUD), what options are available and can be exercised?
Several options are available. You can use:
- The OUD internal capability called the Replication Gateway.
- The synchronization tool, called the Directory Integration Platform, which is a part of Oracle Directory Services Plus.
- The manual export and import method.
Now, let's evaluate the pros and cons of each method.
Replication Gateway is the default out-of-the-box solution to perform the replication and include OUD instances in an existing ODSEE replication topology.
This feature came into existence, because it works at the replication protocol level. The gateway performs the required adaptation of replication protocols between ODSEE and OUD.
The main advantage of this feature is that it provides strong consistency between the two types of directories. This fully leverages conflict management implemented in the replication protocols to ensure that changes are applied in a coherent and ordered manner under all circumstance. It does not require specific modification on existing ODSEE production instances, such as enabling retro changelog. Changes are propagated at near speed of replication in both directions. As full meta-data are replicated by the Replication gateway, it will also synchronize internal password policy states, ensuring proper account locking and optimal conflict resolution.
OUD replication gateway does not require any specific tool or installation-specific procedure. It is installed like any OUD component and then managed like any other OUD component.
OUD Replication Gateway does not perform data adaptation between ODSEE and OUD.
Using Directory Integration Platform as the synchronization tool.
This brings flexibility in remapping and transformation between ODSEE and OUD.
However, you need to pay a price to use a tool (like DIP) to perform the synchronization task. You need to enable the retro change log to access the changes on the ODSEE side. This in turn has an impact on the disk , CPU usage and performances, which could be a serious challenge for your existing ODSEE environment, if you have not provisioned additional hardware and instances.
Using export and import method with standard directory administrative commands.
This seems very simple, but this methodology cannot ensure an highly-available deployment with up-to-date entries on both sides.
This solution can be used if full high availability with up-to-date data at any time is not needed. It is often used if data cleaning needs to take place to avoid polluting a new environment with old unnecessary data.