News archive

January 03, 2012

Bugfix in Client/Sever IDO-Overlay

The updated version 4.0.1 of PeerfactSim.KOM fixes a bug in the Client/Server IDO-Overlay, which threw a NullPointer-Exception.The bugfix comprises the following classes:



May 11, 2011

New version of PeerfactSim.KOM

Finally, after more than two years, PeerfactSim.KOM 4.0 is now available. During this period of time, the simulator was mainly developed and improved within academic research. The new features comprise different aspects of the simulator, which will be briefly sketched in the following.

New implementations

On the Application Layer, the simulator consists of a simple filesharing application. In this application peers can store references to...


May 02, 2011

Accepted Paper about PeerfactSim.KOM

The paper "PeerfactSim.KOM: A Simulation Framework for Peer-to-Peer Systems", which details the architecture and underlying concepts of PeerfactSim.KOM got accepted at the International Workshop on Modeling and Simulation of Peer-to-Peer Architectures and Systems (MOSPAS '11). This workshop is part of the International Conference on High Performance Computing & Simulation (HPCS '11), which takes place in July 4-8, 2011 in...


January 07, 2010

Revision of the PeerfactSim.KOM-Hompage

During the release of the new version of PeerfactSim.KOM, the corresponding homepage will be revised and updated with new information around PeerfactSim.KOM. Currently, the Documentation-Section is reorganized and enriched with new content. Further content will unregualariy follow ;)


January 07, 2010

New version of PeerfactSim.KOM

After a longer period of inactivity, a new version of PeerfactSim.KOM will be released in several days. The new release will contain some revised overlay models and provide some additional functionality concerning the configuration and launching of a simulation as well as the visualization of finished simulations.A detailed description of the features will be provided in the next days. The release will also comprise a revised documentation,...


January 26, 2009

PeerfactSim allows for network state visualization

From now on, PeerfactSim provides a novel functionality capable of visualizing  the state and network activity of PeerfactSim. This important feature can be used

to help developers of components, especially overlays, to find bugs and to support the developmentprocess in general,to show the operation of peer-to-peer networks to students for educational purposes,to present peer-to-peer technology to customers and other...


November 10, 2008

Internet Delay Space Model

Since today, PeerfactSim offers novel model to predict lifelike delays between a given pair of end hosts. In addition to its low delay computation time, it has only linear memory costs which allows large scale P2P simulations to be performed. The model includes realistic delay jitter, subject to the geographical position of the sender and the receiver. More information can be found here.


May 22, 2007

Major Updates

Dear visitor,

due to the growth and maturing of our simulator, we believe it is time to substantially revise our web presence and would like to draw your attention to this fact. Approximately from the middle of June, we shall appear with a new look and description of the refactored core components and additional integrated features.


January 25, 2007

The First Workshop on PeerfactSim.KOM

We are glad to announce our first workshop on PeerfactSim.KOM, simulator for large scale peer-to-peer networks, to be held on February 6th, 2007. The main goal is to answer on the following questions:

Yet another peer-to-peer simulator?Architecture of simulatorHow to use simulator? (demo)Setting up simulation: secnarios and metricsUser interfaceWhich overlays are implemented and how? (closer look into the code)How to implement new overlays?...

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