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Subject: Re: [OMPI users] Problem with NFS + PVFS2 + OpenMPI
From: Brock Palen (brockp_at_[hidden])
Date: 2008-05-29 15:33:38

Well don't run like this. Have PVFS have NFS, don't mix them like
that your asking for pain, my 2 cents.

I get this error all the time also, you have to disable a large
portion of the caching that NFS does to make sure that all MPI-IO
clients get true data on the file they are all trying to access. To
make this work check in your /etc/fstab and see if you have the
'noac' option. This is attribute caching, this must be disabled.

On that note PVFS2 is made for doing MPI-IO to multiple hosts (thus
no need for NFS) because it was made with MPI-IO in mind it should
work out the box.

Brock Palen
Center for Advanced Computing

On May 29, 2008, at 3:24 PM, Davi Vercillo C. Garcia wrote:

> Hi,
> I'm trying to run my program in my environment and some problems are
> happening. My environment is based on PVFS2 over NFS (PVFS is mounted
> over NFS partition), OpenMPI and Ubuntu. My program uses MPI-IO and
> BZ2 development libraries. When I tried to run, a message appears:
> File locking failed in ADIOI_Set_lock. If the file system is NFS, you
> need to use NFS version 3, ensure that the lockd daemon is running on
> all the machines, and mount the directory with the 'noac' option (no
> attribute caching).
> [] MPI_ABORT invoked on rank 0 in
> communicator MPI_COMM_WORLD with errorcode 1
> mpiexec noticed that job rank 1 with PID 5008 on node campogrande04
> exited on signal 15 (Terminated).
> Why ?!
> --
> 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
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