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  • This topic has 1 reply, 1 voice, and was last updated 9 years ago by tobias amft.
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  • #678

    Hello there,
    i want to test some applications like instant messaging, shared calender and maybe some other real time applications using the structured P2P overlays. and my question is whether i can use Peerfactsim.Kom simulator
    for this purpose?
    thanks in advance


    tobias amft

    Hello MH,

    yes, you can use Peerfactsim.Kom for your purpose.
    In the following I briefly describe how to do this:

    Simulations in PeerfactSim.Kom are configured using a simple xml-file.
    Please consider “chord.xml” in folder “config/visualization”, which is structured as follows:
    – First, you can specify variables you want to use in this config-xml-file.
    – Next, you define and configure different layers you want to use: NetLayer, Translayer, Overlay, Application, and Monitor
    – Most Important: with the HostBuilder you define how many nodes to simulate and what layers each host/group comprises
    – As a last step you can choose between different churnmodels, and select an “actions-file”

    In the actions file (here: config/visualization/chord-actions.dat) you can specify actions, a specific group should perform at given time
    (Be aware that all nodes in the group perform this action.)
    Note that actions in the action-file (in “chord-actions.dat”: startLookups or …:join) are implemented in the “component”- or “additionalClasses” you select in the xml-file (last few lines in “chord.xml”)

    The given config file should fulfil your purpose.
    – Chord is selected
    – DHTLookupGenerator is installed as application on all simulates hosts

    You can implement your applications either directly in chord, or as standalone application on top.
    For the former, consider “org.peerfact.impl.overlay.dht.chord.chord.components.ChordNode”.
    For the latter, consider the DHTLookupGenerator in “org.peerfact.impl.application.dhtlookupgenerator.DHTLookupGenerator”.
    This class simply starts some lookups in the given p2p overlay.

    Have fun!

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