Operations Guide

     Previous  Next    Open TOC in new window    View as PDF - New Window  Get Adobe Reader - New Window
Content starts here

Starting and Stopping Servers

The following sections describe how to start and stop servers in an Oracle Communications Converged Application Server domain:

 

Startup Sequence for a Oracle Communications Converged Application Server Domain

Note: Oracle Communications Converged Application Server start scripts use default values for many JVM parameters that affect performance. For example, JVM garbage collection and heap size parameters may be omitted, or may use values that are acceptable only for evaluation or development purposes. In a production system, you must rigorously profile your applications with different heap size and garbage collection settings in order to realize adequate performance. See “Tuning JVM Garbage Collection for Production Deployments” on page C-1 for suggestions about maximizing JVM performance in a production domain.
WARNING: When you configure a domain with multiple engine and SIP data tier servers, you must accurately synchronize all system clocks to a common time source (to within one or two milliseconds) in order for the SIP protocol stack to function properly. See Configuring NTP for Accurate SIP Timers in the Configuration Guide for more information.

Because a typical Oracle Communications Converged Application Server domain contains numerous engine and SIP data tier servers, with dependencies between the different server types, you should generally follow this sequence when starting up a domain:

  1. Start the Administration Server for the domain. Start the Administration Server in order to provide the initial configuration to engine and SIP data tier servers in the domain. The Administration Server can also be used to monitor the startup/shutdown status of each Managed Server. You generally start the Administration Server by using either the startAdminServer.cmd script installed with the Configuration Wizard, or a custom startup script.
  2. Start SIP data tier servers in each partition. The engine tier cannot function until servers in the SIP data tier are available to manage call state data. Although all replicas in each partition need not be available to begin processing requests, at least one replica in each configured partition must be available in order to manage the concurrent call state. All replicas should be started and available before opening the system to production network traffic.

    3. You generally start each SIP data tier server by using either the startManagedWebLogic.cmd script installed with the Configuration Wizard, or a custom startup script. startManagedWebLogic.cmd requires that you specify the name of the server to startup, as well as the URL of the Administration Server for the domain, as in: 

    startManagedWebLogic.cmd datanode0-0 t3://adminhost:7001
  3. Start engine tier servers. After the SIP data tier servers have started, you can start servers in the engine tier and begin processing client requests. As with SIP data tier servers, engine tier servers are generally started using the startManagedWebLogic.cmd script or a custom startup script.

Following the above startup sequence ensures that all Managed Servers use the latest SIP Servlet container and SIP data tier configuration. This sequence also avoids engine tier error messages that are generated when servers in the SIP data tier are unavailable.

 

Administration Server Best Practices

The Administration Server in a Oracle Communications Converged Application Server installation is required for configuring, deploying, and monitoring services and applications.

Note: If an Administration Server fails due to a hardware, software, or network problem, only management, deployment, and monitoring operations are affected. Managed Servers do not require the Administration Server for continuing operation; Java EE applications and SIP features running on Managed Server instances continue to function even if the Administration Server fails.

Oracle recommends the following best practices for configuring Administration Server and Managed Server instances in your Oracle Communications Converged Application Server domain:

Should an Administration Server instance or machine fail, remember that only configuration, deployment, and monitoring features are affected, but Managed Servers continue to operate and process client requests. Potential losses incurred due to an Administration Server failure include:

To resume normal management activities, restart the failed Administration Server instance as soon as possible.


  Back to Top       Previous  Next