anchor.diff:  
   == Single Tier and Multitier Implementations
   
  -Measurements and metrics are an important part of managing your Kill
  -Bill system to be sure that performance is optimized and any problems
  -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
  +Several third party tools are available to manage and display Kill Bill's metrics of
   this type. One popular tool is https://www.datadoghq.com/[Datadog]. This
   package offers a low-cost option to monitor and display whatever metrics
   you may find useful from the Kill Bill collection, including metrics
  
positive.code: To authorize the sending of the Kill Bill metrics, it is necessary to
  edit two lines in this file:
  
   `/var/lib/tomcat/bin/setenv2.sh`.
  
     This file contains configuration information for `tomcat`, which manages the
  KillBill web applications.
  
  This is a small file. The two lines to be edited are:
  
negative.code: Datadog can be integrated with several types of Kill Bill installations. In this guide we discuss the use of datadog to manage metrics produced
  by two types of implementations on Amazon Web Services (AWS):
  Single Tier and Multitier. With the latest Amazon Machine Image (AMI)
  for Kill Bill, the application is preconfigured to collect these metrics and to direct them to Datadog once authorization is provided.
  
   
  == Set Up Datadog
  
  You may already be familiar with datadog. If not, this section will
  