This template provisions an ArcGIS Enterprise deployment that includes Portal for ArcGIS, a GIS Server site (set as the portal's hosting server), ArcGIS Data Store (a relational and tile cache data store; you can optionally direct the template to create a spatiotemporal big data store on additional machines), and ArcGIS Web Adaptor on one AWS instance. It will set up an architecture as shown in the graphic below.
If you later decide you need a spatiotemporal big data store, you can add one from the AWS Management Console. Find the autoscaling group that has your CloudFormation stack name and change the Desired, Min, Max parameters to 1.
If you want to add more machines to the spatiotemporal big data store, wait until the spatiotemporal big data store is successfully registered to your base ArcGIS Enterprise deployment's hosting server, then change the Desired, Min and Max number to the number you want, e.g., 3.
If you specify 1 for BDSInstances, always launch your stack with Desired, Min and Max number set to 1. If you want to add instances to your spatiotemporal big data store, wait until the spatiotemporal big data store is successfully registered to your base ArcGIS Enterprise deployment's hosting server, then connect to your deployment from the AWS Management Console and change the Desired, Min and Max number to the number you want, e.g., 3.
See Troubleshoot AWS CloudFormation stack creation in the ArcGIS Enterprise on Amazon Web Services help if you run into problems.
The Portal for ArcGIS initial administrator needs to customize the portal for your organization's use. See the topics in the Portal for ArcGIS administrator guide for information on configuring the portal web site, adding members, securing the portal, and other administrative tasks.