If an instance (a compute node) fails, HCP for cloud scale automatically adds new service instances to other available instances (compute nodes) to maintain the minimum number of service instances. Data on the failed instance is not lost and remains consistent. However, while the instance is down, data redundancy might degrade.
HCP for cloud scale adds new service instances automatically only for floating services. Depending on the remaining number of instances and service instances running, you might need to add new service instances or deploy a new instance.