[mpich-discuss] Error in the mpdboot step

[Prashantha Hebbar]

Hi Pavan,

Thanks for the reply.
I have tried running mpd as you suggested. But did not work for me.

mlscub1 at mlscub1-desktop:~$ mpdboot -n 2 -f mpd.hosts --ncpus=1
unable to obtain IP for host: mlscub1 at mlscub1-desktop.local
unable to obtain IP for host: mlscub2 at mlscub2-desktop.local
totalnum=2  numhosts=1
there are not enough hosts on which to start all processes

I tried it in other way round with specifying hostname of mpd master in
slave system. That works fine.
 
mlscub1 at mlscub1-desktop:~$ mpd &
[1] 22750

mlscub1 at mlscub1-desktop:~$ mpdtrace -l
mlscub1-desktop_50100 (172.16.17.24)

mlscub2 at mlscub2-desktop:~$ mpd -h mlscub1-desktop.local -p 50100 &
[1] 11418

mlscub2 at mlscub2-desktop:~$ mpdtrace -l
mlscub2-desktop_50514 (172.16.17.93)
mlscub1-desktop_50100 (172.16.17.24)

mlscub1 at mlscub1-desktop:~$ mpdtrace -l
mlscub1-desktop_50100 (172.16.17.24)
mlscub2-desktop_50514 (172.16.17.93)

So, can you please tell me what might have gone wrong? I do not think it is
a problem of my /etc/hosts setting.
mlscub1 at mlscub1-desktop:~$ cat /etc/hosts
127.0.0.1       localhost
172.16.17.24    mlscub1-desktop

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

I have another problem with executing programs. I find something like
permission denied error messages.

mlscub1 at mlscub1-desktop:~$ mpiexec -n 5
/home/mlscub1/libraries/mpich2-1.2.1/examples/cpi.c
problem with execution of
/home/mlscub1/libraries/mpich2-1.2.1/examples/cpi.c  on  mlscub1-desktop:
[Errno 13] Permission denied
problem with execution of
/home/mlscub1/libraries/mpich2-1.2.1/examples/cpi.c  on  mlscub2-desktop:
[Errno 2] No such file or directory
problem with execution of
/home/mlscub1/libraries/mpich2-1.2.1/examples/cpi.c  on  mlscub2-desktop:
[Errno 2] No such file or directory
problem with execution of
/home/mlscub1/libraries/mpich2-1.2.1/examples/cpi.c  on  mlscub1-desktop:
[Errno 13] Permission denied
problem with execution of
/home/mlscub1/libraries/mpich2-1.2.1/examples/cpi.c  on  mlscub1-desktop:
[Errno 13] Permission denied

Please give suggestions to  solve this.

Thanking you in anticipation.

Regards,

Prashantha
Lecturer,
Manipal Life Sciences Center,
Manipal University,
Manipal, India

-----Original Message-----
From: mpich-discuss-bounces at mcs.anl.gov
[mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Pavan Balaji
Sent: Monday, February 01, 2010 7:27 PM
To: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] Error in the mpdboot step

Prashantha,

On 02/01/2010 06:52 AM, Prashantha Hebbar wrote:
> I was trying to install MPICH2 in Unbutu systems. It seems, installation
> went well. But when I perform  mpdboot -n 1 -f mpd.hosts, I find
> (mpdtrace -l) only local mpd is running not the other machine mpd. I
> have transferred mpich2_install directory to my other system and
> configured the path. I have also done ssh_keygen to avoid password
> during ssh and configured /etc/dhcp3/dhclient.conf with hostname to do
> ssh with hostname. But still I am not able to cluster mpich2 of both the
> machines. I have attached a file containing the error information which
> I got during the process. Please find the attachment. So, can please
> tell me what has gone wrong? How to make it up and run?

You need to use:

% mpdboot -n <total_nodes> -f mpd.hosts --ncpus=<cores_on_local_node>

 -- Pavan

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji
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