Tuning and Troubleshooting Host Decommissioning
Decommissioning a host decommissions and stops all roles on the host without requiring you to individually decommission the roles on each service. The decommissioning process can take a long time and uses a great deal of cluster resources, including network bandwidth. You can tune the decommissioning process to improve performance and mitigate the performance impact on the cluster.
You can use the Decommission and Recommission features to perform minor maintenance on cluster hosts using Cloudera Manager to manage the process.