Configuring Relay Servers and Outbound Enablers

Configure Relay Servers and outbound enablers (OEs) to support load balancing in an SAP Mobile Server cluster.

Task

The diagram above illustrates an SAP Mobile Platform Runtime cluster with two SAP Mobile Server nodes, using two Relay Servers, with Apache acting as a load balancer. This document focuses on this configuration, while providing information on what to do differently to set up different configurations, for example:

• More than two Relay Servers
• Hardware load balancer in place of Apache

• Configuring SAP Mobile Server to use Relay Server
  Choose a method for configuring SAP Mobile Server to use Relay Server, then generate a Relay Server configuration file. Copy the file to the Relay Server host, and distribute the same configuration file to multiple Relay Server nodes.
• Generating and Modifying the Relay Server Configuration File
  Generate all or part of a Relay Server configuration file. Then transfer the generated file to all Relay Server hosts.
• Deploying a Relay Server Configuration File
  After you generate a Relay Server configuration file, you must copy it to each Relay Server host, to update the Relay Server configuration. All Relay Servers in a cluster SAP Mobile Platform installation must use identical copies of the Relay Server configuration file, rs.config.
• Configuring the Outbound Enablers
  Set up one or more outbound enablers (OEs) for each SAP Mobile Server, connecting to the load balancer, as identified in a Relay Server configuration.
• Configuring State Manager as a Service
  Set up the State Manager process to run as a service on the Relay Server host.
• Installing a Load Balancer
  (Applies only to deployments with two or more Relay Servers.) You can use either a software or a hardware load balancer to get the best performance out of your Relay Servers.
• Tips for Tuning Your Relay Server Configuration on IIS
  Increase performance of Relay Servers hosted by IIS Web server.
• Relay Server Pass-Through Mode for HTTP Clients
  HTTP clients can connect through a Relay Server to SAP Mobile Server to use the REST services.