Creating and editing a queuing network model

This topic describes how to create and edit a queuing network model (QNM). For details on queuing network models, see Calibrating-queuing-network-models.

To create a queuing network model

1. In Workspace, click Domains, Services & Applications > domainName  > Works folder.
2. Click Add > Add model. The model creation wizard is displayed. 
3. On the Model type page, select Predict saturation based on business drivers growth (QUEUING NETWORK MODEL), and click Next.

4. On the Correlation analysis page, select the Performance vs. Load analysis on which the model will be based, and click Next.

   Note

   To create a new Queuing Network Model, your domain must meet the following requirements:

   • A Performance vs Load analysis must exist for the current domain.
   • The business driver map for the PLA analysis must be made of compatible resource types.
   • At least one service demand must be defined for such resources.

   If any of these conditions is not satisfied, you cannot proceed.

5. On the Resource types to be included in the model page, select the system resources, and click Next.
6. On the Service demand bounds page, select one of the following options for the output, and click Next:
   • Show only average service demands.
   • Show average service demands and bounds: Enables you to plot bounds through average, optimistic or pessimistic estimation techniques from the Estimate limit using list.
7. On the Name page, type a name and description for the model, and click Next.
   A default name based on the selected metrics, is displayed. You can change it as required. You can also click  to select the parameters you want to include in the model name.
8. On the Summary page, click Finish.
   The Queueing Network Model's detail page is displayed, listing the entities that the model takes into account.

• 
  
  • Systems: Lists all systems and their resources covered by the model. The Calibration option in the Systems table allows you to apply a calibration factor to improve the response time estimation using the results of a load testing. For more information, see Model calibration.
  • Business Drivers: Lists all business drivers that will be analyzed.
  • Prediction scenarios: Lists all available scenarios and allows you to add new scenarios.

Video

The following video (4:30) illustrates the process of creating a queuing network model.

 https://youtu.be/w46j9BAvyQc

To edit a queuing network model

1. Click Workspace > Domains, Services & Applications > domainName  > Works folder.
2. Click on the model you want to edit. In the model's detail page that opens in the work area, click Edit.
3. In the Edit model page, edit properties, such as Name, Description, Access Mode, and Bounds. 
   • Select the preferred access mode:
     • Public analysis
     • Public read-only analysis
     • Private analysis
   • Configure the displayed bounds for this model:
     • Show only average service demands
     • Show average service demands and bounds: Allows you to plot bounds through average, optimistic or pessimistic limit estimation techniques.
4. Click Save.