Oracle Fusion Middleware Upgrade and Migration Guide for Oracle Directory Server Enterprise Edition

Migrating the Hubs

    For each hub in the replicated topology:

  1. Disable replication agreements from the masters to the hub you want to migrate.

  2. Disable replication agreements from the hub you want to migrate to the consumers.

  3. Stop the hub.

  4. Migrate the hub according to the instructions under Chapter 4, Overview of the Migration Process for Directory Server.

  5. Start the hub.

  6. Enable the replication agreements from the masters to that hub.

  7. Enable the replication agreements from that hub to the consumers.

  8. If you have migrated the data, check that replication is in sync.

  9. If you have not migrated the data, reinitialize the hub.

The following sequence of diagrams illustrate the migration of a hub, as described above. The first diagram shows the topology before migrating the hubs.

Figure 7–5 Topology With Migrated Consumers

Figure shows basic multi-master topology with migrated

The first migration step involves disabling replication agreements, effectively isolating the hub from the topology.

Figure 7–6 Isolating the Hub From the Topology

Figure shows hub removed from topology

The next step involves migrating the legacy hub.

Figure 7–7 Migrating Hub

Figure shows migration of one hub

The next step involves enabling the replication agreements to the new hub and initializing the hub if necessary.

Figure 7–8 Placing the 11g Release 1 (11.1.1) Hub Into the Topology

Figure shows topology with migrated consumers and hub

Check that the replication on the consumers is in sync with the rest of the topology before migrating another hub. A server that has just been migrated does not have a change log, and can therefore not update consumer servers that are out of sync. Allow the topology to stabilize and all servers to synchronize before migrating the next supplier server.