Home > Storage > PowerScale (Isilon) > Product Documentation > Cloud > APEX File Storage for AWS: Deployment Guide > Prepare the EC2 instance user data for additional nodes
The user data of the additional cluster nodes provides the nodes with the information they need to form a cluster. See the section additional-node-user-data-template.json for details. Table 9 shows the description of additional-node-user-data-template.json. Keep other options as the default if they are not listed in Table 9.
The section User data of additional nodes example provides examples.
json file key name | Description |
hal_volume_type | The EBS volume type for the cluster, gp3 or st1. |