Multiple Outputs in Multithreading Mode

Recording, Visualizing and Persisting Data
1

Hey,

I have been modifying the **ExampleB1** to calculating the Energy Deposit. I am writing the total Energy deposit to a ROOT File using the G4AnalysisManager. But when i use more number of threads, it creates more number of output files. For example, if run it on a single thread, then the output file is created as output.root, when i use 4 threads, 4 files are created: output_t0.root, output_t1.root,....output_t3.root its like a file for each thread. Is there any to fix it such that i can get a single output file

My codes can be accessed via this repository:

I am using Geant4 version 11.2.1 on windows 11 with visual studio compilers.

Thanks
Anantha Padmanabhan

2

I think that you should add some code in the runaction.
liking following
runaction::runaction()

{

G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();


analysisManager->SetNtupleMerging(true);

}

3

Thank you for your response. I found out that you can also use the hadd target_name.root output_t{0..n}.root command from ROOT for this purpose.

Best
Anantha

4

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