[gate-users] Maximum file size exceeded problem

Sat Sep 18 15:39:04 CEST 2004

Dear Amarnath,

For your second question: Gate usually use std::iostream to write file, so don't
worry about Geant. However, I don't know if the std c++ lib should be built.

To add macros, edit the ../gate_v1.0/GNUmakefile
first set LARGE_FILE varible in your .cshrc file, then
then add the following words after line 61 (I asume using v1.0): 
#ifdef LARGE_FILE
   CPPFLAGS += -DYOUR_MACRO_HERE
#endif
at last, contributes your code here. :-)

regards

Long Zhang

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: "Long ZHANG" <zhanglong99 at tsinghua.org.cn>,
  "GATE feedback and helplinefor Users" <gate-users at lphe1pet1.epfl.ch>
>Subject: Re: [gate-users] Maximum file size exceeded problem
>
>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
> 
>> 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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