Legacy environments can be complex and varied. To reduce risk in the upgrade or migration, there are some factors that you must consider during the planning process.

Upgrades are complex and have many prerequisites. Examples include:

• Upgrading the existing versions of individual components to a supported, upgradable version
• Converting to different components before the overall platform upgrade

There are also differences whether you are upgrading from CDH or HDP. The HDP process requires intermediate steps, such as upgrading and using Apache Ambari with HDP before converting to Cloudera Manager for CDP.

In order to mitigate risk in the upgrade or migration, you must consider data replication and protection before beginning the process. Planning for workload testing and validation is also important for derisking the move to CDP. If a plan is not already in place, you can set up a multicluster replication scenario for the legacy cluster before the upgrade, and for the new cluster.

For full details on upgrade and migration pathways, including checklists, tools, and complete instructions, see the Cloudera documentation about CDP Private Cloud Base upgrades.

The upgrade or migration planning period is the ideal time to consider if you need, or could benefit from, a hardware upgrade. Plan in terms of both capacity and performance by considering both:

• The listed Data Management with Cloudera Data Platform on Dell Infrastructure Design Guides
• The hardware requirements for CDP Private Cloud Data Services, which can be found in the CDP Private Cloud Data Services documentation on the Cloudera documentation website