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LoadGen
Developer(s)LoadGen B.V.
Initial release2005
Stable release
5.0 / March 30, 2025
Written inMultiple
Operating systemWindows, Linux
PlatformVirtual desktop infrastructure (VDI), Web applications
TypeLoad testing, Performance monitoring, GUI testing
LicenseProprietary
Websitewww.loadgen.com

LoadGen is a proprietary software suite developed by the Dutch company LoadGen B.V. for load testing, performance monitoring, and end-user simulation in virtual desktop infrastructure (VDI), web applications, and traditional desktop environments. Originally introduced in 2005, the software was created to simulate user workloads in Citrix-based infrastructure and later expanded to support technologies such as Microsoft Remote Desktop Services (RDS), VMware Horizon, and Azure Virtual Desktop (AVD).[1][2][3][4]

History

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LoadGen was developed in the mid-2000s in response to demand for scalable user load simulation in Citrix environments. The initial commercial release occurred in 2005. A 2006 review by application virtualization expert Tim Mangan, published on BrianMadden.com, highlighted LoadGen's simplified interface and affordability compared to Citrix's proprietary tools at the time.[1]

Features

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Load and Performance Testing

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The platform enables simulation of concurrent user sessions to assess system behavior under stress. It includes a graphical test designer and validation techniques such as screen comparison and image-based recognition. Sessions are managed by dedicated agents known as "LoadBots".[5]

Functional and Automated Testing

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LoadGen integrates with continuous integration and deployment (CI/CD) tools via command-line interfaces and PowerShell scripting. Community contributors have documented its application in automated performance test pipelines using orchestration platforms.[6]

End-to-End Monitoring

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Test scenarios can be distributed geographically to analyze system performance under real-world latency and load conditions. This approach has been used in research conducted by the GO-EUC community testing group.[3][7]

Architecture

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LoadGen consists of multiple modular components:

  • LoadGen Director – configuration and orchestration interface
  • LoadGen Studio – no-code environment for building test scenarios
  • LoadGen Analyzer – data analysis and reporting module[4]
  • LoadBots – agents responsible for executing simulated workloads
  • Automation interfaces – including REST APIs, CLI tools, and PowerShell integration

Industry Usage

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Based on case studies and industry reporting, LoadGen has been used in sectors such as finance, healthcare, public administration, and managed IT services. Common applications include capacity validation, regression testing, and infrastructure benchmarking.[3]

Reception

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LoadGen has been mentioned in several independent evaluations and technical publications:

  • TechTarget and Computer Weekly articles on VDI sizing list LoadGen as a benchmarking tool.[2]
  • The GO-EUC testing platform has published research incorporating LoadGen in simulated environments to assess Windows system performance and optimization impacts.[3][7]
  • Independent EUC consultant Ingmar Verheij has authored multiple technical articles on LoadGen's implementation, configuration challenges, and analysis features.[5][4][8]
  • Tim Mangan's early review remains a cited third-party evaluation of LoadGen in Citrix-based load testing.[1]

Certification

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LoadGen B.V. offers a training and certification program titled Certified LoadGen Pro. The course covers topics such as workload simulation, performance diagnostics, and automation scripting.[9]

See also

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References

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  1. ^ a b c Mangan, Tim (2006). "DeNamiK LoadGen Beta Product Review". TMurgent.
  2. ^ a b Twiest, Chris (2023-02-22). "6 steps for calculating and sizing a Citrix VDI environment". TechTarget.
  3. ^ a b c d Van Pelt, Anton (2025-02-28). "Will Windows security hardening improve systems performance?". GO-EUC.
  4. ^ a b c Verheij, Ingmar (2013-05-10). "Review of Denamik Analyzer".
  5. ^ a b Verheij, Ingmar (2012-06-22). "Unable to install/activate LoadBot (Denamik LoadGen)".
  6. ^ Ververs-Bijkerk, Ryan (2021-06-30). "LoadGen automation using PowerShell".
  7. ^ a b Ververs-Bijkerk, Ryan (2021-10-14). "Performance impact of Windows 10 21H1". GO-EUC.
  8. ^ Verheij, Ingmar (2011-05-23). "Loadtesting best practices – Part 1".
  9. ^ "LoadGen – Pricing, Alternatives & More". Capterra. 2025.
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