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Complete Introduction to Load Runner

Posted: Oct/04/2009   By: Guru   Points:15   Category: Testing  - Load Runner    Views:208   Vote Up (0)   Vote Down (0)    
LoadRunner is an industry-leading performance and load testing product by Hewlett-Packard (since it acquired Mercury Interactive in November 2006) for examining system behavior and performance, while generating actual load.
LoadRunner can emulate hundreds or thousands of concurrent users to put the application through the rigors of real-life user loads, while collecting information from key infrastructure components (Web servers, database servers etc). The results can then be analysed in detail, to explore the reasons for particular behaviour.

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Divisions in Load Runner

  
Load Runner is divided up into 3 smaller applications:
The Virtual User Generator allows us to determine what actions we would like our Vusers, or virtual users, to perform within the application. We create scripts that generate a series of actions, such as logging on, navigating through the application, and exiting the program.

Explain Complete Steps in The LoadRunner Testing Process?

  
There are five steps in LoadRunner Testing Process:

Successful load testing requires that you develop a thorough test plan. A clearly defined test plan will ensure that the LoadRunner scenarios that you develop will accomplish your load testing objectives.

Explain Load Test Planning

  
Developing a comprehensive test plan is a key to successful load testing. A clearly defined test plan ensures that the LoadRunner scenarios you develop will accomplish your load testing objectives.

Creating a Scenario with Load Runner

  
To develop a scenario, you create a host list, a script list and a Vuser list.
This chapter describes how to create a host list--the list of machines, or hosts, that execute Vuser scripts during a scenario run.

Brief Introduction About Transaction Breakdown with Load Runner

  
After running a scenario, you perform an analysis of the run by generating graphs and reports.
If the graphs show a reasonable transaction time for the Vusers, you do not need to further analyze the transactions. However, if the transaction response time is not acceptable, you can use one of LoadRunner's monitoring tools to pinpoint the problem. The monitoring tools are Transaction Breakdown, Network Monitoring, and Resource Monitoring.

Describe briefly about Hosted Virtual Users in Load Runner

  
LoadRunner Hosted Virtual Users complements in-house load testing tools and allows companies to load test their Web-based applications from outside the firewall using Mercury Interactive's infrastructure.

How the Monitors Work with Load Runner

  
To minimize the impact of the monitoring on the system under test, LoadRunner enables IT groups to extract data without having to install intrusive capture agents on the monitored servers.

List the recommended objects to be monitored during a load test?

  
The following list describes the recommended objects to be monitored during a load test:

ASP Server
Cache
HTTP Content Index
 
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