A Complex Deployment Suitable for Incremental Migration

In a complex deployment with many back-end servers, you might still be able to migrate groups of domains incrementally. Your installation must fit the guidelines described in Rules for Incremental Migration.

A Complex Deployment Suitable for Incremental Migration shows one part of a large, complex server configuration and LDAP directory. It is assumed that the entire deployment includes many additional servers and domains not shown in the figure.

Figure 2–2 A Portion of a Multiple-Server Deployment Suitable for Incremental Migration

In the example shown in A Complex Deployment Suitable for Incremental Migration, Back-end servers 1, 2, and 3 manage across domain boundaries, as follows:

• Back-end Server 1 manages Domain 1, 2, and 3.

• Back-end Server 2 manages Domain 3, 4, and 5.

• Back-end Server 3 manages Domain 4, 5, and 6.

No individual server exclusively manages a single domain.

Taken together, however, Back-end servers 1, 2, and 3 manage a unique set of domains that can be migrated incrementally.

In this example, when you run the Schema Migration Utility, you can specify Domains 1, 2, 3, 4, 5, and 6 in the migration to Schema 2. You can then reconfigure Back-end servers 1, 2, and 3 to use Schema 2.

Similarly, you could migrate and configure other groups of domains and servers that form distinct units within the deployment. In the example shown in A Complex Deployment Suitable for Incremental Migration, Back-end Server 4 and the domains it manages might be candidates for another stage in an incremental migration.