anchor.diff:  
   ### <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%>
  -
  -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, will be available when scaling.
   
   <%=vars.pcf_pools%>
   
   ### <a id='databases'></a> Databases
   
  -For database services deployed outside <%= vars.product_short %>, plan to leverage your infrastructure's high availability features and to configure backup and restore where possible. <%= vars.scaling_ert_db %>
  +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>
   
  
positive.code: 
  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.
  
  <%= vars.scaling_ert %>
  
  <%= partial vars.scale_table %>
  
  
  ## <a id='supporting-scaling'></a> Configure Support for High Availability Components
  
  This section describes the surrounding infrastructure required to support scaling component VMs for high availability.
  
  <% if vars.platform_code == 'CF' %>
  <%= vars.max_in_flight_header %>
  
negative.code: This topic describes the components used to ensure high availability in <%= vars.app_runtime_full %>, vertical and horizontal scaling, and the infrastructure required to support scaling component VMs for high availability.
  
  
  ## <a id='azs'></a> Availability Zones for High Availability
  
  Availability Zones (AZs) are locations where public cloud services offer data centers. 
  
  