[ROOT] Merging files

From: Christian Schmitt (schmittc@whep.uni-wuppertal.de)
Date: Thu Nov 29 2001 - 14:58:20 MET


Hi ROOTers,

I have the following problem: I need to merge several hundred files, each 
containing the same tree. The total size is something like 10 GB.
So I cannot use just TChain::Merge because of the 2GB limit of root-files.

Now my wuestion is: how can I merge the files such that ideally I get 5 to 6 
files with each having a filesize < 2GB ?

It should be a solution which works in general, i.e. doesn't make an 
asumption on the structure of the tree in the files (the only thing known is 
that the trees are simple trees, i.e. only integers, or floats are stored).

Thanks for your help,

	Christian Schmitt



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