Fair Scheduler to Capacity Scheduler transition
You must transition from Fair Scheduler to Capacity Scheduler when upgrading your cluster to CDP Private Cloud Base. The transition process involves automatically converting certain Fair Scheduler configuration to Capacity Scheduler configuration prior to the upgrade and manual fine tuning after the upgrade.
In CDP, Capacity Scheduler is the default and supported scheduler. You have to transition from Fair Scheduler to Capacity Scheduler when upgrading from CDH to CDP Private Cloud Base.
The scheduler transition process includes migrating the YARN settings from Fair Scheduler to Capacity Scheduler:
- Preparing for cluster upgrade: As using the Upgrade Cluster Wizard in Cloudera Manager you have to add the necessary services before you can start upgrading your cluster. When you add the YARN QueueManager Service you have to copy your scheduler settings. That is when you can use the fs2cs conversion utility to automatically convert Fair Scheduler into Capacity Scheduler as a part of the Upgrade Wizard in Cloudera Manager.
- Upgrade the cluster to CDP Private Cloud Base.
- Post-upgrade: Manually configure and fine-tune the scheduler after the upgrade is completed.
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