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Subject: Re: [OMPI users] Accessing OpenMPI processes over Internet using ssh
From: Ralph Castain (rhc_at_[hidden])
Date: 2011-11-30 16:14:41


As I said, please do a quick search on the "user" mailing list. There are numerous discussions there about how to do this. Here is another one that dealt with getting thru the Amazon firewall:

http://www.open-mpi.org/community/lists/users/2011/02/15646.php

On Nov 30, 2011, at 1:58 PM, Jaison Paul wrote:

> Ralph Castain <rhc <at> open-mpi.org> writes:
>
>>
>> This has come up before - I would suggest doing a quick search of "ec2" on our
> user list. Here is one solution:
>> On Jun 14, 2011, at 10:50 AM, Barnet Wagman wrote:I've put together a simple
> system for running OMPI on EC2 (Amazon's cloud computing service). If you're
> interested, see
>>
>>
>>
>> http://norbl.com/ppe-ompi.html
>>
>
> I have tried little bit more:
>
> I have set the MCA parameters as follows:
> mpirun -np 1 --mca btl tcp,self --mca btl_tcp_if_exclude lo,eth0 -hostfile
> hostinfo nbs-client -bynode
>
> But still failed and got the following error:
>
> Permission denied (publickey).
> --------------------------------------------------------------------------
> A daemon (pid 24744) died unexpectedly with status 255 while attempting
> to launch so we are aborting.
>
> There may be more information reported by the environment (see above).
>
> This may be because the daemon was unable to find all the needed shared
> libraries on the remote node. You may set your LD_LIBRARY_PATH to have the
> location of the shared libraries on the remote nodes and this will
> automatically be forwarded to the remote nodes.
> --------------------------------------------------------------------------
> mpirun: clean termination accomplished
>
> I dont understand the "Permission denied (publickey)" error. I access the EC2
> instance using password-less ssh as follows:
>
> ssh ubuntu <at> ec2-67-202-**-***.compute-1.amazonaws.com
>
> So, what went wrong?
>
> hostinfo file is:
>
> [jmulerik <at> jaison Client]$ cat hostinfo
> localhost
> ubuntu <at> ec2-67-202-48-118.compute-1.amazonaws.com
>
> Jaison
>
>
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