To run the actual genomics tasks, we create a compute environment (CE) using EC2 Spot instances.
In the first section we choose the name ‘spot-ce’ , let the wizard create a new service role  and select the previously created admin role .
In the second section we select Spot  as the provisioning model, leave most of the defaults and set the minimal/desired vCPUs to 4 .
In a production environment we might want to choose 0 as a minimum to scale down to no compute at all in case no work is to be done. When conducting a workshop we keep the CE from scale down to zero, as a scale out takes a couple of minutes.
We keep the defaults, add a tag so that we can identify the compute-environment in the third section and click create .
Afterwards the dashboard shows a spot-ce compute environment.