Root file size limitation

Dear ROOT users,

Is there a file size limitation for the root file? I am using ROOT 6.18/04 with gjm to merge many root output files from clusters. The total file size is around 31 G while the gjm always switched the merging file from the first one to the new one when the first merged file hit 17 G. Is there any other way to re-merge the two 17 G files together? Any reply will be highly appreciated!

_ROOT Version: 6.18/04
_Platform:_Centos 7


What is “gjm”?

ROOT will usually switch to a new TFile when the current one reaches a limit of TTree::MaxTreeSitze() which is 100000000000LL (i.e. 100GB) by default.

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