[gate-users] Maximum file size exceeded problem

[Amarnath Srinivasan]

Hello Zhang and Others,
I am using Gate in Redhat 9  for simulating a PET scanner and produce output
in Ascii Format. When the output file exceeds 2Gb I get an error saying
"FileSize Limit Exceeded" and the program terminates. I am hitting the 2**31
bit limit of the datatype off_t.

1.   I am looking for ways to fix this problem.Based on Mr.Zhang's
provious mail I looked for large file support in Redhat Linux. RH9 supports
large files. But to enable that for gate,  gate should be compiled in gcc
with the "large file support turned on". I would like to know if gate
supports
large files? What is the procedure to compile gate with large file support
turned on? Has anyone done this before?

2.  Will doing "gcc -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64  program.c"
by editing the make file for gate help? If yes what are the files that
should be edited ?
 Does this have to be done for geant too?

3. I would also like to know if someone has produced files larger than 2GB
in gate in "any" platform?

Thankyou
Amarnath Srinivasan
Research Assistant
Center for Advanced Imaging
PO Box 9235
Dept of Radiology, HSC, WVU
Morgantown, WV 26506
asrinivasan at hsc.wvu.edu
Phone Office: 304 293 6925 /Lab: 304 293 5586
----- Original Message ----- 
From: "Long ZHANG" <zhanglong99 at tsinghua.org.cn>
To: <gate-users at lphe1pet1.epfl.ch>
Sent: Friday, August 27, 2004 2:46 AM
Subject: Re: [gate-users] Maximum file size exceeded problem


> Dear Srinivasan,
>
> There are several limits on Linux Filesystem, the one you met is defined
by VFS
> module, that is to say, all filesystemson your kerenl have a maximus size
of 2GB.
>
>
> So the solution is to update your kernel and use another filesystem. A
journal
> filesystem can resolve this problem (EXT2/EXT3 can't). You'd better query
Linux
> Journal Filesystem on GOOGLE, then you can get many good solution.
>
> Hope this helps!
>
> Best regards,
>
> Long
>
> In your mail:
> >From:"Amarnath Srinivasan" <asrinivasan at hsc.wvu.edu>
> >Reply-To: GATE feedback and helpline for Users
<gate-users at lphe1pet1.epfl.ch>
> >To: "GATE feedback and helpline for Users" <gate-users at lphe1pet1.epfl.ch>
> >Subject: Re: [gate-users] Maximum file size exceeded problem
> >
> >
> >Hello,
> >
> >We were running gate on RedHat 9 . When the output ascii file
> "gate_coincidence.dat" size  exceeded 2GB I got an error saying maximum
file size
> exceeded and the program terminated.
> >Does anybody have idea on how to fix this problem.
> >
> >
> >
> >thankyou
> >Amarnath Srinivasan
> >Research Assistant
> >Center for Advanced Imaging
> >PO Box 9235
> >Dept of Radiology, HSC, WVU
> >Morgantown, WV 26506
> >asrinivasan at hsc.wvu.edu
> >  ----- Original Message ----- 
> >  From: yuxuan.zhang at di.mdacc.tmc.edu
> >  To: gate-users at lphe1pet1.epfl.ch
> >  Sent: Tuesday, August 24, 2004 5:08 PM
> >  Subject: [gate-users] about random coincidences
> >
> >
> >
> >  hi all,
> >
> >  In my simulation I noticed a strange result that I can not figure it
out.
> >  My setup is that: using cylindricalPET system with 30 rsetors, one
point
> >  source at the center. The radiation activity is very high, thus there
are
> >  lots of random coincidences (accidental coincidences) in the totoal
> >  coincidences. Now I do the statistics on these random coincidences
according
> >  to the sector index, then I found that the coincidences between 2
opposite
> rsectors
> >  (e.g. No.0 and 15, or No.5 and 20) are much more than the coincidences
between
> other
> >  2 sectors ( No. 0 and 14, or No. 0 and 16 ...) Usually the difference
can be
> 50% or 100% depend on the thickness of the detector. Is anyone else
noticed that?
>
> >  Can you have a try in your computer to find out whether this is a bug
of GATE
> or there
> >  is somthing wrong with my simulation? Thank you very much.
> >
> >
> >  Best regards,
> >
> >  Yuxuan Zhang
> >
> >
> >  Dr. Yuxuan ZHANG
> >  Dept. Experimental Diagnostic Imaging
> >  Univ. Texas, MD Anderson Cancer Center
> >  1515 Holcombe Blvd, Unit 217
> >  Houston, TX 77030-4095
> >
> >  Tel: +1-713-745-1671
> >  Fax: +1-713-745-1672
> >
> >
>
>---------------------------------------------------------------------------
---
> >
> >
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>
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