That paper was exploring an application of a proposed extension to the MPI standard for fault tolerance purposes. By default this proposed interface is not provided by Open MPI. We have created a prototype version of Open MPI that includes this extension, and it can be found at the following website:

You should look at the interfaces in the new proposal (ULFM Specification) since MPI_Comm_validate_rank is no longer part of the proposal. You can get the same functionality through some of the new interfaces that replace it. There are some examples on that website, and in the proposal that should help you as well.

Josh

On Mon, Nov 19, 2012 at 8:59 AM, sri pramoda <sri_pramoda@yahoo.com> wrote:

Dear Sir,
                I am Pramoda,PG scholar from Jadavpur Univesity,India.

I've gone through a paper "Building a Fault Tolerant MPI Application:
A Ring Communication Example".In this I found MPI_Comm_validate_rank command.

But I didn't found this command in mpi. Hence I request you to please send me    the implementation of this command.

                Thank you,

                              Pramoda.

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Joshua Hursey
Assistant Professor of Computer Science
University of Wisconsin-La Crosse
http://cs.uwlax.edu/~jjhursey