dolfin team mailing list archive

[Johan Hake <johan.hake@xxxxxxxxx>]

Nice!

Does this work for writing a Function to file in parallel too, like saving a 
solution during a run?

Johan

On Wednesday September 28 2011 16:34:57 Garth N. Wells wrote:
> After a long absence, Function i/o to file has made a come back. It
> was particularly necessary to support running code in parallel that
> reads in data for Functions (such as the advection-diffusion demo). We
> have more demos running in parallel now, and it's now possible to
> restart parallel computations reliably (and even on a different number
> of processes).
> 
> When sending a Function to an XML file, there is an entry for each
> vector (dof) entry, e.g.
> 
>     <dof global_index="2" value="0" cell_index="3" local_dof_index="0" />
> 
> 'global_index' is the vector index, 'value' is the entry value,
> 'cell_index' is a cell that the dof belongs to and 'local_dof_index'
> is the local dof number relative to the given cell. With this
> information, it's possible to read in and use function data
> independently of the new dof map. If anyone has suggestions or
> objections to this format, speak up now.
> 
> When reading in a Function, the Function must have a FunctionSpace,
> and the vector must already have been sized (since the partitioning of
> the vector in parallel will depend on the mesh partition).
> 
> Garth
> 
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