Re: TimeBetSnapshot in galaxy.param has no effect ?

From: Nicholas Yue <yue.nicholas_at_gmail.com>
Date: Wed, 27 Nov 2013 14:13:12 +1100

Here is my galaxy.param file and it has those values already set they way
you suggested

% Relevant files

InitCondFile ICs/galaxy_littleendian.dat
OutputDir galaxy/

EnergyFile energy.txt
InfoFile info.txt
TimingsFile timings.txt
CpuFile cpu.txt

RestartFile restart
SnapshotFileBase snapshot

OutputListFilename parameterfiles/output_list.txt

% CPU time -limit

TimeLimitCPU 36000 % = 10 hours
ResubmitOn 0
ResubmitCommand my-scriptfile


% Code options


ICFormat 1
SnapFormat 1
ComovingIntegrationOn 0

TypeOfTimestepCriterion 0
OutputListOn 0
PeriodicBoundariesOn 1

% Caracteristics of run

TimeBegin 0.0 % Begin of the simulation
TimeMax 3.0 % End of the simulation

Omega0 0
OmegaLambda 0
OmegaBaryon 0
HubbleParam 1.0
BoxSize 0

% Output frequency

TimeBetSnapshot 0.00000005
TimeOfFirstSnapshot 0

CpuTimeBetRestartFile 36000.0 ; here in seconds
TimeBetStatistics 0.05

NumFilesPerSnapshot 1
NumFilesWrittenInParallel 1



% Accuracy of time integration

ErrTolIntAccuracy 0.025

CourantFac 0.15

MaxSizeTimestep 0.01
MinSizeTimestep 0.0




% Tree algorithm, force accuracy, domain update frequency

ErrTolTheta 0.5
TypeOfOpeningCriterion 1
ErrTolForceAcc 0.005


TreeDomainUpdateFrequency 0.1


% Further parameters of SPH

DesNumNgb 50
MaxNumNgbDeviation 2
ArtBulkViscConst 0.8
InitGasTemp 0 % always ignored if set to 0
MinGasTemp 0


% Memory allocation

PartAllocFactor 1.5
TreeAllocFactor 0.8
BufferSize 25 % in MByte


% System of units

UnitLength_in_cm 3.085678e21 ; 1.0 kpc
UnitMass_in_g 1.989e43 ; 1.0e10 solar masses
UnitVelocity_in_cm_per_s 1e5 ; 1 km/sec
GravityConstantInternal 0


% Softening lengths

MinGasHsmlFractional 0.25

SofteningGas 0
SofteningHalo 1.0
SofteningDisk 0.4
SofteningBulge 0
SofteningStars 0
SofteningBndry 0

SofteningGasMaxPhys 0
SofteningHaloMaxPhys 1.0
SofteningDiskMaxPhys 0.4
SofteningBulgeMaxPhys 0
SofteningStarsMaxPhys 0
SofteningBndryMaxPhys 0




MaxRMSDisplacementFac 0.2



























On 27 November 2013 13:45, Robert Thompson <rthompsonj_at_gmail.com> wrote:

>
> Hi Nicholas,
>
> I'm not sure if these parameters are present in G2, but in G3 I would make
> sure the following parameters are set:
>
> OutputListOn 0
> TimeOfFirstSnapshot 0
>
> If OutputListOn is 1 then I believe gadget will ignore TimeBetSnapshot.
> Hope that helps!
>
> -Robert Thompson
>
>
>
>
> On Nov 26, 2013, at 5:53 PM, Nicholas Yue <yue.nicholas_at_gmail.com> wrote:
>
> >
> > Hi,
> >
> > I am trying to get Gadget2 to generate more snapshot (HDF5) files so
> that I can have a better visualization
> >
> > I tried making the TimeBetSnapshot to very small values
> >
> > TimeBegin 0.0 % Begin of the simulation
> > TimeMax 3.0 % End of the simulation
> > SnapFormat 3
> > TimeBetSnapshot 0.000000000001
> >
> > but when I ran it
> >
> > mpirun -np 8 ./Gadget2 parameterfiles/galaxy.param
> >
> > I see that all my 8 CPUs are occupied but no snapshots were produce
> after 15 minutes
> >
> > Is there another parameter which I need to modify ?
> >
> > Cheers
> >
> > --
> > Nicholas Yue
> > Graphics - RenderMan, Visualization, OpenGL, HDF5
> > Custom Dev - C++ porting, OSX, Linux, Windows
> > Management - Recruitment, career management
> > http://www.proceduralinsight.com/
> > http://au.linkedin.com/in/nicholasyue
> >
> >
> >
> >
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-- 
Nicholas Yue
Graphics - Arnold, Alembic, RenderMan, OpenGL, HDF5
Custom Dev - C++ porting, OSX, Linux, Windows
http://au.linkedin.com/in/nicholasyue
https://vimeo.com/channels/naiadtools
Received on 2013-11-27 04:13:12

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