The files are about 4 Mb each.
Per file it seems (subjectively) to be going quicker now ... about 2-4s per
file. This is just chaining them though ... so it's going to take 2 hours
before it even starts running.
I have a (crude) loop like below:
for (Int_t i =0 ; i<numberOfFiles ; ++i){
TString num="";
num+=i;
TString numPrefix="";
for (Int_t j = 0 ; j < (sizeOfNum-num.Length() ) ; ++j) numPrefix+="0";
chain->Add(pre+numPrefix+num+post);
}
and
pre="rfio:/castor/cern.ch/atlas/transfer/emoyse/dc1.002000.lumi02.recon.010._";
post =".hlt.pythia_jet_17.root";
sizeOfNum=5;
Even if this loop is sub-optimal (which I can quite believe) I don't see that
it can make that much difference.
Oh, and I'm using the latest version 3.05.07.
Ed
On Friday 12 September 2003 3:23 pm, Rene Brun wrote:
> Ed,
>
> How big are your files? 1 Mbyte, 100 MBytes, 1 GByte ?
> How long does it take to process one single file?
> TChain should not add any overhead.
> Which version are you using?
>
> Rene Brun
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