Dear experts, I am familiar with the issue of not being able to hadd files to make an output tree larger than 100Gb, but I just attempted to do so by accident and saw an error message that gave me hope there is a fix for this - pasted below. I wonder if this is in the pipeline, or should I give up…

:slight_smile: I would hope that hadd can handle this even more elegantly than it currently does - this looks basically like half a bug: half, because it basically knows what’s going on. I suggested to @pcanal , the master of hadd, to take a look… He will give you an authoritative answer instead of…

Hi, I have to look to see if we can more elegantly handle this in the hadd code. In the meantime, you can lift the limitation by creating a rootlogon.C file containing (at least) { TTree::SetMaxTreeSize( 1000000000000LL ); // 1 TB } Where you can put the limit to up to std::numeric_limits::m…

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Root 6.04.14 hadd 100Gb, TFileMerger::RecursiveRemove

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