Software in Pega Cloud are deployed using "Infrastructure as code" approach. Based on code, we can run hundreds of instances in a few minutes. This process is fully automatic. Depending of the current needs we can sale in/ scale out instances so all requests will be handled in a proper time.
The data is stored in a database and therefore an appropriate system for creating snapshots should be introduced. In Pega Cloud we have daily backups strategy, as well as we are offering manual backup from the time that Customer request.