Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: Re: [OMPI users] Problem with NFS + PVFS2 + OpenMPI
From: Davi Vercillo C. Garcia (davivercillo_at_[hidden])
Date: 2008-05-29 15:48:49


> Oh, I see you want to use ordered i/o in your application. PVFS
> doesn't support that mode. However, since you know how much data each
> process wants to write, a combination of MPI_Scan (to compute each
> processes offset) and MPI_File_write_at_all (to carry out the
> collective i/o) will give you the same result with likely better
> performance (and has the nice side effect of working with pvfs).

I don't understand very well this... what do I need to change in my code ?

Davi Vercillo Carneiro Garcia
Universidade Federal do Rio de Janeiro
Departamento de Ciência da Computação
"Good things come to those who... wait." - Debian Project
"A computer is like air conditioning: it becomes useless when you open
windows." - Linus Torvalds
"Há duas coisas infinitas, o universo e a burrice humana. E eu estou
em dúvida quanto o primeiro." - Albert Einstein