[gate-users] root file size

[Nehmeh, Sadek/Medical Physics]

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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