[ndnSIM] consumers repetitively request same data from producer

Farzane Zrk farzane.zrk at gmail.com
Fri Jan 31 12:20:50 PST 2020

Hello everyone,
I have implemented a new structure for nfd::cs and now I want to test my
model. I want a scenario that several consumers request a huge amount of
data (like 10k) from a producer with which they are connected via a central
node.  Just this central node has a content store and all the consumers
will request the same 10k packets with different orders.
Searching at this mailing list, I found the code below. However, in this
code, consumers repetitively ask for just 4 packets.
Is it possible that I change it in a way that each consumer sends identical
10k interests?
If there is another way to write that scenario please tell me.

  NodeContainer nodes;
  nodes.Create (5);  // Connecting nodes using two links
  PointToPointHelper p2p;
  p2p.Install (nodes.Get (0), nodes.Get (4));
  p2p.Install (nodes.Get (4), nodes.Get (2));
  p2p.Install (nodes.Get (3), nodes.Get (4));
  p2p.Install (nodes.Get (1), nodes.Get (4));
  // Install NDN stack on all nodes
  ndn::StackHelper ndnHelper;
  ndnHelper.SetPit ("ns3::ndn::pit::Lru","PitEntryPruningTimout","20");
  ndnHelper.SetDefaultRoutes (true);
  ndnHelper.SetContentStore("ns3::ndn::cs::Lru", "MaxSize", "10000000");
  ndnHelper.Install(nodes.Get (4));
  ndnHelper.Install(nodes.Get (0));
  ndnHelper.Install(nodes.Get (1));
  ndnHelper.Install(nodes.Get (2));
  ndnHelper.Install(nodes.Get (3));
  Ptr<UniformRandomVariable> x = CreateObject<UniformRandomVariable> ();
  ndn::AppHelper consumerHelper ("ns3::ndn::ConsumerCbr");
  ndn::AppHelper producerHelper ("ns3::ndn::Producer");
  consumerHelper.SetPrefix ("/prefix");
  consumerHelper.SetAttribute ("Frequency", StringValue ("5"));
  ApplicationContainer consumer[4][20];
  producerHelper.SetPrefix ("/prefix");
  producerHelper.SetAttribute ("PayloadSize", StringValue("1024"));
  ApplicationContainer producer[4][21];

  for ( int i=0;i <10;i++){

    int provider=x->GetInteger (0,3);
    int user=x->GetInteger (0,3);
    while( (provider)==(user)){
    user=x->GetInteger (0,3);

    consumer[user][i]=consumerHelper.Install (nodes.Get (user));
    producer[provider][i]=producerHelper.Install (nodes.Get (provider));
    std::cout <<"provideris :"<<provider<<"user is "<<user<< std::endl;

Thank you in advance,
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