[Carpet] regridding?

[Erik Schnetter]

On May 5, 2006, at 08:07:29, Bela Szilagyi wrote:

> Should we introduce a parameter that will tell CarpetIOHDF5  that  
> at recovery
> it should read the value of CarpetRegrid::coordinates (and possibly  
> other
> carpetregrid parameters) from the checkpoint file rather than from the
> parameter file?  This would go along the same lines as
>
> CarpetIOHDF5::use_reflevels_from_checkpoint
>
> introduced by Christian Ott.

If you want a parameter to be read from the checkpoint file, you just  
have to not set that parameter in the parameter file you use for  
recovering.  The number of refinement levels is different -- this is  
not a parameter, this follows from the grid structure in the  
checkpoint file.

This is the first time we use parameter steering for something  
essential in Cactus.  We now find that it causes problems with  
restarting.  We may need to rethink the way we restart -- maybe we  
should not use the original parameter file for recovering, but  
instead only a truncated one with just the location of the checkpoint  
file and the new output directory.  This would automatically take all  
parameters from the checkpoint file.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

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