Modifying a Cluster

This section describes how to make changes to the cluster through Cloudera Director, using the client and the configuration file.

Growing or Shrinking a Cluster

After launching a cluster, you can add or remove instances:

Change the value for the type of instance you want to change. For example, the following increases the number of workers to 15:

workers {
      count: 15
      minCount: 5

      instance: ${instances.hs18} {
        tags {
          group: worker
        }
      }

Enter the following command:
```
cloudera-director update aws.conf
```
Cloudera Director increases the number of worker instances.
Assign roles to the new master instances through Cloudera Manager. Cloudera Director does not automatically assign roles.