anchor.diff:  
   You can horizontally scale most <%= vars.product_short %> components to multiple instances to achieve the redundancy required for high availability. 
   
  -You should also distribute the instances of multiply-scaled components across different AZs to minimize downtime during ongoing operation, product updates, and platform upgrades. If you use more than three AZs, ensure that you use an odd number of AZs.
  +You should also distribute the instances of components with multiple instances across different AZs to minimize downtime during ongoing operation, product updates, and platform upgrades. If you use more than three AZs, ensure that you use an odd number of AZs.
   
   <%= vars.scaling_ert %>
   
   <%= partial vars.scale_table %>
   
   
  -## <a id='supporting-scaling'></a> Configure Support for High Availability Components
  +## <a id='supporting-scaling'></a> Support Component Scaling
   
  -This section describes the surrounding infrastructure required to support scaling component VMs for high availability.
  +The ability to vertically scale component VMs is important for high availability. 
  +
  +To scale component VMs, you must ensure that the surrounding infrastructure of your deployment supports VM scaling.
  +
  +This section describes the infrastructure required to support scaling component VMs for high availability.
   
   <% if vars.platform_code == 'CF' %>
   <%= vars.max_in_flight_header %>
  
positive.code: A deployment with three or more availability zones operates uninterrupted when entire AZs become unavailable. For example, a three-AZ deployment stays available when one entire AZ goes down, and a five-AZ deployment stays available during an outage of up to two AZs.
  
  
  ### <a id='external-lbs'></a> External Load Balancers
  
  To ensure high availability for a production environments, use a highly-available customer-provided load balancing solution that does the following:
  
  
negative.code: 
  ### <a id='resource-pools'></a> Resource Pools
  
  Each IaaS has different ways of limiting resource consumption for scaling VMs. Consult with your IaaS administrator to ensure additional VMs and related resources, like IPs and storage, are available to scale.
  
  To configure your resource pools according to the requirements of your deployment, see <%=vars.pools_link%>
  
  <%=vars.pcf_pools%>
  
  ### <a id='databases'></a> Databases
  
  For database services deployed outside <%= vars.product_short %>, use the high availability features included with your infrastructure. Also, configure backup and restore where possible. <%= vars.scaling_ert_db %>
  
  <p class="note"><strong>Note:</strong> Data services may have single points of failure depending on their configuration.</p>
  
  