anchor.diff:  AWS, using either the
   https://docs.killbill.io/latest/aws-singletier.html[Single Tier] or
   https://docs.killbill.io/latest/aws-multitier.html[Multitier]
  -installation options. The single tier option runs Kill Bill, Kaui, the
  -MariaDB database and the nginx load balancer on a single AWS EC2
  +installation options. The single-tier option runs Kill Bill, Kaui, the
  +MariaDB database, and the nginx load balancer on a single AWS EC2
   instance. This is suitable for quick deployment and for testing and
  -development. The multitier option runs Kill Bill and Kaui on two or more
  +development. The multi-tier option runs Kill Bill and Kaui on two or more
   separate EC2 instances, and uses an AWS RDS database manager along with
   an AWS load balancer. This is an attractive option for many production
   uses.
  
positive.code: 
  image::metrics-newrelic-installation.png[align=center]
  
  5. In the box containing the install command, click *Copy Command*. The command will be copied to your clipboard.
  
  [NOTE]
  This command includes the API key assigned to you by
  
negative.code: can be detected early. Kill Bill collects over 1,300 metrics to show you
  every conceivable view of your system's behavior.
  
  Several third-party tools are available to manage and display metrics of
  this type. One popular tool is https://www.newrelic.com/[New Relic]. This
  package offers a low-cost option to monitor and display whatever metrics
  you may find useful from the Kill Bill collection, including metrics
  