Re: [ROOT] output file size

From: Rene Brun (Rene.Brun@cern.ch)
Date: Tue Mar 11 2003 - 09:27:54 MET


Hi Michael,

The automatic file swap was only implemented in 3.03/09
It cannot work with earlier versions

Rene Brun


Michael Gold wrote:
> 
> I am using root version,
>   Version   3.03/07     5 August 2002
> 
> For this version there is no TTree::SetMaxTreeSize or GetMaxTreeSize.
> Instead I am using the TChain::Merge method.
> The program indeed is opening multiple files.
> At the start of the program, I get the printout:
>   >>Merge: Switching to new file: results/topAna_1.root at entry: 260715
>   >>Merge: Switching to new file: results/topAna_2.root at entry: 509747
> So root is calculating what files it will open based on the tree size
> and the number of events in the input chain.
> 
> However, sometime after opening the _1 file, I start to get a slew of errors,
> one
> for every branch element in my tree:
> 
> >> Error in <TBasket::Create>: Cannot allocate 28338 bytes for ID = eleA.BCPx
> Title = topAna
> 
> Does anyone understand this error and what I am doing wrong?
> 
> Thanks,
> Michael Gold



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