Before You Migrate

This chapter provides an overview of the upgrade and data migration process.

Before upgrading, familiarize yourself with the new features and fixes available in the current version. Take the opportunity to review design decisions made during implementation of existing directory services. For a description of all new features and fixes, see Chapter 1, New Features in Oracle Directory Server Enterprise Edition 11g Release 1 (11.1.1.5.0), in Oracle Directory Server Enterprise Edition Release Notes. For information about the new features that specifically affect migration, see Chapter 8, Architectural Changes in Directory Server Since Version 5.2.

Prerequisites to Migrate a Single Directory Server Instance

Before migrating a server instance, ensure that the following prerequisites are met:

• Directory Server 11g Release 1 (11.1.1.5.0) must be installed. The new server can be installed on the same machine as the existing server or on a different machine.

• Ensure that the new machine has sufficient local disk space to house binaries and databases for both the old and new servers, and also enough extra space to hold LDIF files containing the entries in all existing suffixes. You can estimate the local disk space required as somewhat larger than the following calculation.

  local space required = 2 * (space for existing server) + (space for LDIF files)

• If you are using the automatic migration tool, the following two prerequisites must be met:

  • The existing server instance must be stopped cleanly.

  • If the new server is located on a different machine, a complete image of the original server instance must be created on the new machine. This includes all schema files, configuration files, security files, and database files, in an identical layout to the original server root.

  To determine whether you should use automatic or manual migration, see Deciding on Automatic or Manual Migration.

• If your Directory Server deployment includes Identity Synchronization for Windows, you must uninstall Identity Synchronization for Windows before migrating Directory Server. For information about migrating Identity Synchronization for Windows, see Chapter 10, Migrating Identity Synchronization for Windows.