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.