Hi,
I’d like to know whether there is a way to merge a TChain under a certain selection condition (e.g. with a TEventList), so that the output tree/file size is reduced relativ to the summed up file sizes.
I used to first merge everything without selection and afterwards reduce the file size by switching off branches and applying a TEventList before doing a TTree::CopyTree. However I’d like to avoid the time consuming creation of a 30GB TFile.
Is there a smart way to do so?
Best regards and thanks,
Klaus
ROOT Version: 6.10-08
Platform: Debian GNU/Linux 8 (jessie)
Compiler: Not Provided