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

www.umich.edu/~brockp

Center for Advanced Computing

brockp@umich.edu

(734)936-1985

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).
[campogrande05.dcc.ufrj.br:05005] 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
DCC-IM/UFRJ - http://www.dcc.ufrj.br

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