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Subject: Re: [OMPI users] remote host not accessible
From: Doug Reeder (dlr_at_[hidden])
Date: 2008-04-01 17:29:52


The filesystem physically on the master, specifically including the
directory where you are running the open-mpi program, should be NFS
mounted by the slave machines. The absolute path name should be the
same on all machines. I don't know if that will fix your problem but
we had to do thaqt on our linux clusters and os x clusters.

On Apr 1, 2008, at 2:22 PM, Danesh Daroui wrote:

> You mean I should mount NFS filesystems of slave machine on master so
> their disks can be accessed from a mount point on master? In that
> cases,
> what moint point on master
> shoud it be? Should I configure open-MPI about this mount point? Can't
> it work without mounting? I think it should work since the
> processes are
> locally run via SSH on remote machines.
> D.
> Doug Reeder skrev:
>> Danesh,
>> Do they all have access to the sam file system/physical hard drive.
>> You will probably need to NFS mount the filesystem on master on the
>> other two systems.
>> Doug Reeder
>> On Apr 1, 2008, at 1:46 PM, Danesh Daroui wrote:
>>> Hi all,
>>> I have installed Open-MPI on three machine which runs OpenSUSE
>>> and it
>>> has been installed successfully. I can submit jobs locally on each
>>> machine using "mpirun" and it works fine. I have defined a
>>> host file on one of them (master) where I have defined IP address of
>>> each machine and number of slots. First when I tried to submit
>>> jobs to
>>> master it asked for password for SSH connection which showed
>>> that master can communicate with slaves. Then I setup all
>>> machines to
>>> communicate with each other using SSH without password. Now when I
>>> submit a job on master, the job just blocks and nothing
>>> happens. The program runs locally on each machine but it will not
>>> run
>>> when I submit it on master to be run on slaves. What can it be?
>>> D.
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