[gate-users] root file size

[Mutanga Theodore]

Hello there

first of all thanks for the suggestions. I am currently using root Version
  4.01/03   7 November 2004, I get the file size problem when I use Dirks
Combine.C code to combine the root files. Could it be that the code needs
to be modified?
Also if anyone has some other code for merging rootfiles from GATE I will
be grateful to have it. About analyzing the data sequentially I have no
idea about how to do that.

Also Sadek did you get my other mail about the binner I am so eagerly
waiting for ?

cheers

Theodore


> Theodore, I know there is 2GB limitation in the root file size. One way
> to analyze your data, and that's how I do it, is to loop over the root
> files and do you analysis on a file-by-file basis, while you update your
> output information. Another thing you may need to be careful with when
> you combine your root files into one is that some variables, like for
> example the eventID which will be incremented to cover the total number
> if events from all runs, may exceed the max number allowed for an
> integer for example. In this case, random numbers will be assigned to
> the varaible.
>
> 	Regards,
>
> 	Sadek
>
>
> ----------------------------------------
>  Sadek A. Nehmeh, Ph.D.
>  Assistant Attending Physicist
>  Medical Physics Department
>  Nuclear Medicine Service
>  Memorial Sloan-Kettering Cancer Center
>  Tel: (212)-639-2175
>  Email: nehmehs at mskcc.org
> ------------------------------------------
>
>
>
>
>
>
> -----Original Message-----
> From: gate-users-bounces at lphe1pet1.epfl.ch
> [mailto:gate-users-bounces at lphe1pet1.epfl.ch] On Behalf Of Mutanga
> Theodore
> Sent: Sunday, December 12, 2004 7:28 AM
> To: gate-users at lphe1pet1.epfl.ch
> Subject: [gate-users] root file size
>
> Greetings, I am running some 100 simulations in batch mode on the
> cluster, 50 % of them succeeded and I have to collect the files together
> to get one big root file.And also the .ima , .dim and .info files.
>
> I tried to use Dirk K's Combine.C code to combine the files. The
> resulting output file is still split into other smaller files when the
> size gets to about 2G.
>
> Is there some means of not having this split , ? I don't know how to
> analyze the files with root if I have them seperated.
>
> Regards
>
> Theo
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