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Re: [sumo-user] Replications with different seeds from TRACI
This is still a misunderstanding. Regardless of using libtraci, traciapi or even libsumo, at some point the sumo server process is being started (remotely or locally). Whoever starts that process is responsible for setting options and may set option 'seed'. You can also restart a running process with new options by calling the function traci.load.

Am Fr., 10. Sept. 2021 um 20:45 Uhr schrieb Hervé Diedie <hervediedie@xxxxxxxxx>:
After considering using Libtraci instead of TraCIAPI and after browsing the Libtraci folder in the Simulation.cpp file, a quick check-up of Simulation::start ()  function member showed the following instructions:
#ifdef WIN32
    FILE* pipe = _popen(oss.str().c_str(), "r");
#else
    FILE* pipe = popen(oss.str().c_str(), "r");

meaning that in the  command line embedded in oss.str()   the referred file  (i.e sumo or sumo-gui) will be opened locally.
Therefore my two questions still stand:

Do SUMO and OMNeT++ must be necessarily installed on the same machine to run a simulation campaign with many replications ?

  ... if so, what's the point of using a client-server scheme to bind the two software through TraCI ?


Best regards.



Le ven. 10 sept. 2021 à 16:41, Hervé Diedie <hervediedie@xxxxxxxxx> a écrit :
So, must I consider using Libtraci instead of TraCIAPI ?

Le ven. 10 sept. 2021 à 14:47, <Matthias.Schwamborn@xxxxxx> a écrit :

This looks like a misunderstanding. “Wherever” here means “wherever in your code” (and not in terms of your machine).

 

Best regards, Matthias

 

From: sumo-user <sumo-user-bounces@xxxxxxxxxxx> On Behalf Of Hervé Diedie
Sent: Freitag, 10. September 2021 16:07
To: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Subject: Re: [sumo-user] Replications with different seeds from TRACI

 

In other words, SUMO and OMNeT++ must be installed on the same host... if so, what's the point of using a client-server scheme to bind the

two software through TraCI ?

 

Le ven. 10 sept. 2021 à 12:11, Jakob Erdmann <namdre.sumo@xxxxxxxxx> a écrit :

The same idea applies: wherever you start the sumo process, add those options.

 

Am Fr., 10. Sept. 2021 um 12:28 Uhr schrieb Hervé Diedie <hervediedie@xxxxxxxxx>:

Actually, I'm using Traci for c++  within OMNeT++ simulator, not the python version..

 

Le ven. 10 sept. 2021 à 08:49, Jakob Erdmann <namdre.sumo@xxxxxxxxx> a écrit :

Add options ["--seed", str(yourseed)] to the traci.start call.

 

Am Do., 9. Sept. 2021 um 17:40 Uhr schrieb Hervé Diedie <hervediedie@xxxxxxxxx>:

Hi all,

How can I launch a simulation campaign with reproducible replications with different seeds from Traci ?

 

Beat regards.

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