[Trilinos-Users] Replicate Serial Vectors

[Michael A Heroux]

Ammar,

There are several ways to manage replicated data in Trilinos.  However,
there is no way to have a replicated vector be synchronized "automatically"
for every operation.  We have avoided this type of mechanism because it
would typically require a lot of communication and promote poor parallel
programming approaches.  In general we have avoided implicit communication
because of these problems.

Having said this, there is a concept in Epetra of a LocalMap, such that
Vectors (and MultiVectors) built using such a map will be synchronized
during Epetra operations.  Epetra also supports replicated data through
Import and Export operations.  Imports and Exports can be used to automate
synchronization for user-defined operations.

If you give me a few more details about your situation, I will try to
provide you with some examples.

Mike

> -----Original Message-----
> From: trilinos-users-bounces at software.sandia.gov 
> [mailto:trilinos-users-bounces at software.sandia.gov] On Behalf 
> Of Ammar T. Al-Sayegh
> Sent: Sunday, July 31, 2005 10:59 PM
> To: trilinos-users at software.sandia.gov
> Subject: [Trilinos-Users] Replicate Serial Vectors
> 
> Hi All,
> 
> I would like to replicate short serial vectors over multiple 
> processors. For example, if I have a short serial vector x, 
> and two processors P0 and P1, then I would like to have 
> identical copies of x on P0 and P1. If I change x on P0, then 
> the change will be automatically replicated on P1, and vise 
> versa. Is there a simple example on how to do that?
> 
> Thanks.
> 
> 
> -ammar
> 
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