Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: Re: [OMPI users] mpirun unsuccessful when run across multiple nodes
From: mohd naseem (naseemshakeel_at_[hidden])
Date: 2011-04-20 10:24:52


folloeing error shows

[mpiuser_at_f2 programrun]$ mpiexec -np 4 ./cpi.c
problem with execution of ./cpi.c on f2: [Errno 13] Permission denied
problem with execution of ./cpi.c on f2: [Errno 13] Permission denied
[mpiuser_at_f2 programrun]$ mpdboot -n 2 -v
totalnum=2 numhosts=1
there are not enough hosts on which to start all processes

On Wed, Apr 20, 2011 at 7:51 PM, mohd naseem <naseemshakeel_at_[hidden]>wrote:

> sir i m still not able to trace all the hosts
> following error shows
>
>
>
> [mpiuser_at_f2 programrun]$ mpiexec -np 4 ./cpi.c
> problem with execution of ./cpi.c on f2: [Errno 13] Permission denied
> problem with execution of ./cpi.c on f2: [Errno 13] Permission denied
>
>
>
> On Tue, Apr 19, 2011 at 8:25 PM, Ralph Castain <rhc_at_[hidden]> wrote:
>
>> You have to tell mpiexec what nodes you want to use for your application.
>> This is typically done either on the command line or in a file. For now, you
>> could just do this:
>>
>> mpiexec -host node1,node2,node3 -np N ./my_app
>>
>> where node1,node2,node3,... are the names or IP addresses of the nodes
>> you want to run on, and N is the number of total processes you want
>> executed.
>>
>>
>> On Apr 19, 2011, at 8:47 AM, mohd naseem wrote:
>>
>>
>> sorry sir,
>>
>> i am unable to understand what u are saying ? becoz i am a new user of
>> mpi.
>>
>> please tell me details about it and command also
>>
>> thanks
>>
>>
>>
>> On Tue, Apr 19, 2011 at 2:32 PM, Reuti <reuti_at_[hidden]>wrote:
>>
>>> Good, then please supply a hostfile with the names of the machines you
>>> want to run for a particular run and give it as option to `mpiexec`. See
>>> options -np and -machinefile.
>>>
>>> -- Reuti
>>>
>>>
>>> Am 19.04.2011 um 06:38 schrieb mohd naseem:
>>>
>>> > sir
>>> > when i give mpiexec hostname command.
>>> > it only give one hostname. rest are not shown.
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> > On Mon, Apr 18, 2011 at 7:46 PM, Reuti <reuti_at_[hidden]>
>>> wrote:
>>> > Am 18.04.2011 um 15:40 schrieb chenjie gu:
>>> >
>>> > > I am a green hand on Openmpi, I have the following Openmpi structure,
>>> however it has problem when running across multiple nodes.
>>> > > I am trying to build a Bewolf Cluster between 6 nodes of our serve
>>> (HP Proliant G460 G7), I have installed the Openmpi on one node (assuming at
>>> /mirror),
>>> > > ./configure --prefix=/mirror/openmpi CC=icc CXX=icpc F77=ifort
>>> FC=ifort
>>> > > make all install
>>> > >
>>> > > using NFS, the directory of /mirror was successfully exported to the
>>> rest of 5 nodes. Now as I test the Openmpi, it runs very well on a single
>>> node,
>>> > > however it hangs across multiple nodes.
>>> > >
>>> > > Now one possible reason as I know is that Openmpi uses TCP to
>>> exchange data between different nodes, so I am worried about
>>> > > whether there are firewalls between each nodes, which can be factory
>>> integrated at somewhere(switch/NIC). Could anyone give me some
>>> > > information on this point?
>>> >
>>> > It's not only about MPI communcation. Before you need some means to
>>> allow the startup of the local orte daemons on each machine by
>>> passphraseless ssh-keys or better hostbased authentication
>>> http://arc.liv.ac.uk/SGE/howto/hostbased-ssh.html , or enable `rsh` on
>>> the machines and tell Open MPI to use it. Is:
>>> >
>>> > mpiexec hostname
>>> >
>>> > giving you a list of the involved machines?
>>> >
>>> > -- Reuti
>>> >
>>> >
>>> > > Thanks a lot,
>>> > > Regards,
>>> > > ArchyGU
>>> > > Nanyang Technological University
>>> > > _______________________________________________
>>> > > users mailing list
>>> > > users_at_[hidden]
>>> > > http://www.open-mpi.org/mailman/listinfo.cgi/users
>>> >
>>> >
>>> > _______________________________________________
>>> > users mailing list
>>> > users_at_[hidden]
>>> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>>> >
>>> > _______________________________________________
>>> > users mailing list
>>> > users_at_[hidden]
>>> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>
>>>
>>> _______________________________________________
>>> users mailing list
>>> users_at_[hidden]
>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>
>>
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>>
>>
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>
>