Dear, I want to run a script with many MC files in parallel, but having the output all merged. Is there any clean way to do it using TChain? Or do I have to make list of commands to be submitted and later on hadd the outputs? Thanks for your help!

What do you mean by “submit parallel jobs”? I don’t think ROOT knows anything about your batch system so, unless you try to use ROOT’s built-in PROOF or PROOF-Lite or multi-threading / multi-processing , you need to split your jobs manually.

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How to submit parallel jobs using TChain

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Wile_E_Coyote May 31, 2020, 1:40pm 4

Split large root tree file to small root tree files ROOT

Dear experts, I have a root tree file which contain a large number of entries, when I run my analysis code in the file it takes long time and then my job killed by condor. I would like to split the large root file to smaller root files. any suggestions? Thanks in advance. Regards Reham Please read tips for efficient and successful posting and posting code ROOT Version: Not Provided Platform: Not Provided Compiler: Not Provided

GoHEP/groot: v0.27.0 (root-split, groot-faster-than-root) Evolution Proposals, Apps & Ideas

hi there, I am very happy to announce the release of Go-HEP@v0.27.0: https://go-hep.org/news/release-0.27.0/ https://twitter.com/0xb1ns/status/1265322186283286529 You can easily download standalone binaries (i.e. you don’t need Go installed on your machine) for selected platform+OS combinations from https://go-hep.org/dist (e.g. choosing the latest version). This release has seen quite a few performance improvements in the reading ROOT data area. groot can now read data faster than ROOT i…

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