On 02/24/2015 02:00 PM, vithanousek wrote:
Hello,
Im not sure if I have my OrangeFS (2.8.8) and OpenMPI (1.8.4) set up corectly.
One short questin?
Is it needed to have OrangeFS mounted through kernel module, if I want use
MPIIO?
nope!
My simple MPIIO hello world program doesnt work, If i havent mounted OrangeFS.
When I mount OrangeFS, it works. So I'm not sure if OMPIO (or ROMIO) is using
pvfs2 servers directly or if it is using kernel module.
Sorry for stupid question, but I didnt find any documentation about it.
http://www.pvfs.org/cvs/pvfs-2-8-branch-docs/doc/pvfs2-quickstart/pvfs2-quickstart.php#sec:romio
It sounds like you have not configured your MPI implementation with
PVFS2 support (OrangeFS is a re-branding of PVFS2, but as far as MPI-IO
is concerned, they are the same).
OpenMPI passes flags to romio like this at configure time:
--with-io-romio-flags="--with-file-system=pvfs2+ufs+nfs"
I'm not sure how OMPIO takes flags.
If pvfs2-ping and pvfs2-cp and pvfs2-ls work, then you can bypass the
kernel.
also, please check return codes:
http://stackoverflow.com/questions/22859269/what-do-mpi-io-error-codes-mean/26373193#26373193
==rob
Thanks for replays
Hanousek Vít
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--
Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA
