[Gate-users] About the speed of the Gate

[Fernando Rannou]

Since we use our cooked version of parallel Gate, the ROOT output file
is split in hundred of files, and they usually do not reach a big size. But
this
is not a real solution to the ROOT problem.


Fernando


On Mon, Mar 3, 2014 at 11:49 PM, 张春晖 <arnoxiaolei86 at gmail.com> wrote:

> Hello Fernando
>      I am indeed using ROOT as the output now. How did you resolve it?
> Thanks a lot! Best!--Chunhui Zhang
>
> 2014-03-03 23:54 GMT+08:00, Fernando Rannou <fernando.rannou at usach.cl>:
> > I have experienced that if I use ROOT for data recording, the I/O gets
> > slower and slower if the file
> > grows excessively.
> >
> >
> > Fernando
> >
> >
> > On Mon, Mar 3, 2014 at 11:45 AM, 张春晖 <arnoxiaolei86 at gmail.com> wrote:
> >
> >> Hello Simon:
> >>       Thank you for your reply! When simulating our PET system, I
> >> found that my Gate became slower and slower, Have you encountered
> >> it？In addition, What is the meaning of  “parallelizing our
> >> simulation”？ using the Cuda? or dividing our simulation into many
> >> small tasks?
> >>
> >> Looking forward to your reply, Thanks a lot!
> >> Best.---Chunhui Zhang
> >>
> >>
> >> 2014-03-03 16:51 GMT+08:00, Simon Stute <gate.stute at gmail.com>:
> >> > Hi,
> >> >
> >> > Gate is build on Geant4 in a quite straightforward way.
> >> > So to answer your question "is G4 faster than Gate", I would say: "it
> >> > depends on how you will code your new program".
> >> > G4 cannot be used on its own, it is a library.
> >> > If you want a really really simple PET simulation, maybe you can do it
> >> with
> >> > G4.
> >> > But if you want a "real" PET simulation in the "realistic" sense, then
> >> > I
> >> > recommend you to stay on Gate.
> >> > Otherwise, you need good skills in C++ and plenty of time to do
> >> > something
> >> > already done...
> >> > Also you won't benefit from a validated and experienced code.
> >> > At least, have you thought about parallelizing your simulation ?
> >> >
> >> > Regards,
> >> > Simon
> >> >
> >> >
> >> >
> >> > On Mon, Mar 3, 2014 at 4:09 AM, 张春晖 <arnoxiaolei86 at gmail.com> wrote:
> >> >
> >> >> Hello everyone:
> >> >>          I am simulating the small animal PET using Gate V6.1， but
> the
> >> >> speed is so slow. I want  to know whether the speed of Geant4 is
> >> >> faster than that of the Gate. If so, I will simulate our system under
> >> >> Geant4, Thanks a lot! ---Chunhui Zhang
> >> >> _______________________________________________
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> >> >
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