I am running LAM-MPI on our Mac OS X XServe cluster. I have
LAM installed at /usr/local/lam which is NFS exported to all
the cluster nodes on the local 192.168 network. The
/usr/local directory is located on an XServe RAID being
served by the "head node". We have had no major problems. I
am not sure if the problems is related to having multiple
instances of LAM installed - I can check it out more when I
am at the office tomorrow.
---------------------------------------
Patrick Tripp - Programmer/Analyst
Scripps Insitution of Oceanography
Climate Research Division
La Jolla, CA 92093-0224
-----Original Message-----
From: lam-bounces_at_[hidden]
[mailto:lam-bounces_at_[hidden]] On Behalf Of David Kendig
Sent: Thursday, September 09, 2004 5:53 PM
To: lam_at_[hidden]
Subject: LAM: Help Please: Corrupted Computational Results
on Apple OS X
I am trying to get LAM-MPI installed and running on an Apple
OsX Xserve
cluster. Everything seems to be installed and working fine
HOWEVER when
I compare the output file from the single processor run to
the output
file from the multi processor run using LAM-MPI, the numbers
don't
agree. The MPI run numbers seem to be mixed up and slightly
out of
position.
SO...I ran the test suite and discovered this error:
File locking failed in ADIOI_Set_lock. If the file system is
NFS, you
need to use NFS version 3 and mount the directory with the
'noac' option
(no attribute caching).
Could this error be related? We are using NFS version 3.
(I'm not sure
about the 'noac' option and don't know how to find out on
OSX).
Although NFS is used for the users home space, MPI-LAM is
installed
locally on each of the nodes.
I am out of ideas and don't want to go back to MPICH which
does seem to
work fine.
Help and thanks,
David Kendig
NASA/GSFC
Greenbelt, MD
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