Konstantinos,
Since you ran
configure --prefix=/usr/local
the system-wide config file should be in
/usr/local/etc/openmpi-default-hostfile
Note /usr/local is the default prefix, so you do not even need the
--prefix=/usr/local option
Cheers,
Gilles
On 5/12/2018 6:58 AM, Konstantinos Konstantinidis wrote:
Yeap, exactly the hostfile I have is of the form
node1 slots=1
node2 slots=1
node3 slots=1
where the above hostnames are resolved in ~/.ssh/config file which has
entries of the form
Host node1
HostName 192.168.0.100
User ubuntu
IdentityFile ~/.ssh/mykey.pem
and so on.
So the mpirun cannot pickup the hostfile by itself and I have to
specify it each time.
On Fri, May 11, 2018 at 4:02 PM, Jeff Squyres (jsquyres)
<jsquy...@cisco.com <mailto:jsquy...@cisco.com>> wrote:
Can you provide some more detail? I'm not able to get this to
fail (i.e., it seems to be working as expected for me).
For example, what's the contents of your
/etc/openmpi/openmpi-default-hostfile -- did you list some
hostnames in there?
> On May 11, 2018, at 4:43 AM, Konstantinos Konstantinidis
<kostas1...@gmail.com <mailto:kostas1...@gmail.com>> wrote:
>
> Hi,
>
> I have built Open MPI 2.1.2 multiple times on Ubuntu 16.04 and
then I add the line
>
> orte_default_hostfile=/etc/openmpi/openmpi-default-hostfile
>
> to the file
>
> /etc/openmpi/openmpi-mca-params.conf
>
> and I execute
>
> sudo chown myUsername /etc/openmpi/openmpi-default-hostfile
>
> For some reason this change never goes through and each time I
run a program with mpirun only one local process runs. So I have
to manually specify my hostname with the --hostfile argument.
>
> What can be the cause of this?
>
> The exact series of commands I use for building is the following
>
> sudo apt-get update
> sudo apt-get upgrade
> sudo apt-get install g++
> sudo apt-get install valgrind
> sudo apt-get install libopenmpi-dev
> sudo apt-get install gfortran
> sudo apt-get install make
> wget
https://www.open-mpi.org/software/ompi/v2.1/downloads/openmpi-2.1.2.tar.gz
<https://www.open-mpi.org/software/ompi/v2.1/downloads/openmpi-2.1.2.tar.gz>
> tar -xvf openmpi-* && cd openmpi-*
> ./configure --prefix=/usr/local --enable-mpi-cxx --enable-debug
--enable-memchecker --with-valgrind=/usr
> sudo make all install
>
> Then, I add the following lines to the .bashrc file (Is this
necessary?)
>
> export PATH="$PATH:/usr/local/bin"
> export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib"
>
> for setting the path and library path, respectively and of
course reload .bashrc.
>
> Is the above way of installing Open MPI correct? I am really
wondering since I have no solid Linux knowledge.
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--
Jeff Squyres
jsquy...@cisco.com <mailto:jsquy...@cisco.com>
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