anchor.diff:  
   == Overview
   
  -We provide a **1-click** option to deploy Kill Bill server, KAUI, and the mysql instance on one EC2 host. This option is extremely convenient to get started, but is really limited for production deployments, because the i/ the database runs on the same instance -- i.e if the instance crashes, the data is gone! -- and ii/ there is no redundancy at any level.
  -
  -We also provide another AMI that can be used within the scope of a production deployment, where we rely on a separate enterprise-ready database (RDS), and a multi-node deployment.
  -
  -=== One Node Deployment 
  -
  -In order to get started as quick as possible we offer an AMI that also bundles the mysql database as part of the same image. This makes it very easy to get started, as this only requires the click of a button.
  -
  -Running Kill Bill on AWS using our official AMI lets you deploy Kill Bill, Kaui and MySQL in a single EC2 instance. It is perfect for test environments or for small production deployments where high availability or scale are not a concern.
  +Single AMI deployments are a way to deploy the Kill Bill stack, that is both Kill Bill server and KAUI, the administrative UI, in the same EC2 instance. We provide a `Single-Tier` option that is suitable for testing and experiments, and a `Multi-Tier` option for production deployments.
  +
  +
  +=== Single-Tier Deployments
  +
  +In order to get started as quickly as possible we offer an AMI that also bundles the mysql database as part of the same image. This makes it very easy to get started, as this only requires the click of a button. It is perfect for test environments but we don't recommend it for production deployments.
   
   After launching the AMI you should have a setup that looks like the following:
   
  
positive.code: ```
  
  [5] Add the ELB in front of the EC2 instances
  
  TODO
  
  
  == Configuration
  
negative.code: 
  [2] Start the instances
  
  The steps are similar to the one described for the section `Single-Tier Deployment` above, but in addition, when starting the instance, you will need to specify the properties associated with your RDS instance. In order to make it easy, we have created a `User data` template script, which will need to be edited to specify the real values:
  
  ```
  #!/bin/bash
  