[Trilinos-Users] Proposal concerning the ReplaceLocalValues

[Williams, Alan B]

Riccardo,

The ReplaceGlobalValues method doesn't do the summation. The summation is done by the GlobalAssemble method when values are imported from other processors.

Perhaps the name of the ReplaceGlobalValues method is confusing. The 'Global' in the name refers to whether global vs local identifiers are used to specify rows/columns. The ReplaceGlobalValues method doesn't operate in parallel, it is a serial operation.

One thing we could do is add an option to the GlobalAssemble method to specify how the imported data is treated.

Alan


> -----Original Message-----
> From: trilinos-users-bounces at software.sandia.gov [mailto:trilinos-
> users-bounces at software.sandia.gov] On Behalf Of Riccardo Rossi
> Sent: Monday, February 07, 2011 4:49 AM
> To: trilinos-users at software.sandia.gov
> Subject: [Trilinos-Users] Proposal concerning the ReplaceLocalValues
> 
> Dear List,
> 
>     as pointed out last week, the ReplaceGlobalValues right now
> performs
> a sum of the non_local values to be replaced.
> 
>  Would it be possible to customize such behaviour so that for exampel
> one could prescribe the "maximum" or "minimum" value to be preserved?
> 
> in this way the result would be deterministic, and still an operation
> closer to the replace would be performed.
> 
> aside of this, i had a look to the code inside, and honestly i don't
> understand the current behaviour since a REPLACE is used inside the
> implementation. Can anyone point me to where the actual sum is
> performed?
> 
> thank you
> Riccardo
> 
> --
> ________________________________________________________________
> Riccardo Rossi, Ph.D, Civil Engineer
> member of the Kratos Group: kratos.cimne.upc.es
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