I’m running a job that produce a root file with hundreds of histograms per folder and hundreds of folders. At the end of the job i’m writing few TObjString and Many TVectorD to the same root file so that the configuration is given to the next step automatically and this works perfectly fine.
Now i have to run on a large number of event so i’ve splitted the job into 10 jobs. I’ve got my ten output and when i’m merging them (hadd) it took a lot of time cause it does not know What to do with TVectorD. Is there a way to tell him not to copy these vectors, cause now at the end i have ten times all the vector in the final file.
I didn’t find any options in hadd…