Maximum number of events

ROOT
1

Dear experts,

I’m using Proof Lite for ananlysis. Recently I tried to process big amount of data. The process goes fine, but in the “PROOF Query Progress” window it’s indicated that “number of events - 1000000000”. Meanwhile I know that the real number of events is much bigger. Is this some kind of limitation? Or, maybe, just the biggest number interface can show?

Best,
Dmytro.

2

If you look into the TTree class description, you will find that for many methods, the default “nentries” value is 1000000000. Maybe that’s what you hit.

3

Thank you. Now it’s solved. The default value was overriden by using
chain->Process(“test.C+”,"",chain->GetEntries());

4

Hi,
Calling GetEntries opens the files twice: I am not sure you want to do that all the times.
Which ROOT version are you using?
What is the number of events of the events that triggers the problem? I will try to debug it.

G. Ganis