anchor.diff:  ** `3`: up to 50,000 subscriptions
   ** `4`: beyond 50,000 subscriptions
   * *KauiServerCapacity:* the initial number of Kaui instances in the Auto Scaling group. We recommend using the default value `2`.
  +* *KBAdminPassword:* the `admin` password that will be used for the default `root` user which has all the permissions. By default such password is set to `password`. Typically, one would use the `root` user to create additional roles (along with their permissions) to limit the scope of what specific applications or users can do. See our https://docs.killbill.io/latest/user_management.html[User Management Documentation].
   * *DBClass:* the database instance type to use for RDS. Here are some guidelines:
   ** `db.t3.medium`: test environment
   ** `db.r5.xlarge`: up to 5,000 subscriptions
  
positive.code: * A load balancer, integrated with our internal healthchecks to promptly take out of rotation unhealthy instances
  * A RDS Aurora Cluster with automatic failover
  
  image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/img/aws/cloudwatch.png[align=center]
  
  By installating additional plugins suchs as our free Analytics plugin, you get a subscription billing management solution as feature-rich as popular SaaS platforms, but you are in control.
  
  
  image:https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/img/aws/analytics.png[align=center]
  
  
  For installation support along the way, reach out to `support@killbill.io`.
  
negative.code: 
  == Installation via CloudFormation
  
  === Overview of the Stack
  
  Running Kill Bill on AWS using our +++<a href="https://aws.amazon.com/marketplace/pp/prodview-nochv5omslmds?ref=_ptnr_doc_" onclick="getOutboundLink('https://aws.amazon.com/marketplace/pp/prodview-nochv5omslmds?ref=_ptnr_doc_'); return false;">official CloudFormation template</a>+++ is the easiest and fastest way to get started with a production cluster. *It is also the only method of installation that is certified by the core developers for a Highly Available, horizontally scalable and production-ready installation.*
  
  With the click of a button, the template will install and configure:
  