Dear experts,
I am trying to merge a large number of root files (1000 files) using hadd, but unfortunately, it’s getting killed. I have also observed a similar effect when the file size is large.
Error:
hadd Target path: Run2017C_UL2017_v1.root:/
hadd Target path: Run2017C_UL2017_v1.root:/analyzeBasicPat2D
hadd Target path: Run2017C_UL2017_v1.root:/analyzeBasicPat
./hadd_all.sh: line 10: 138133 Killed hadd Run2017C_UL2017_v1.root /uscmst1b_scratch/lpc1/3DayLifetime/sbarman/Jet/observables/2017/13Jun2024/data/Run2017C_UL2017/Test_Data_2017UL_1*
So, I am merging with small chunks of files manually.
Could you please let me know what is the cause of this issue and how I could merge a large number of files with “hadd” in one go?
*I am using a slightly older version of root due to compatibility issues with my analysis code.
ROOT Version: ROOT 6.28/00
Platform: linuxx8664gcc
Compiler: g++ (GCC) 11.3.0
Regards,
Soumyadip