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Subject: Re: [OMPI users] mpirun/exec requires ssh?
From: Olaf Lenz (lenzo_at_[hidden])
Date: 2009-03-23 13:51:44


Ralph Castain wrote:
> I regularly run jobs like that on 1.3.1 - it has no desire to use ssh to
> start anything. On a local host such as this command uses, all mpiexec
> does is fork/exec the procs.

That sounds strange. I'm just going back and forth between OpenMPI 1.2.9
and OpenMPI 1.3.1 by using make uninstall/make install, and I can always
reproduce the behavior.

> It sounds like something strange is going on in your environment that
> makes OMPI think it is launching on a remote host. Most likely cause is
> something in your Ethernet configuration. Can you send us the output of
> ifconfig (or whatever your equivalent is)?

Ok, here is some information on my system:
* Kubuntu 9.04 (Jaunty) alpha 6
* Core Duo CPU
* I have compiled both OpenMPI versions (1.2.9 and 1.3.1) myself, using

configure --prefix=$HOME/software --enable-shared --enable-static

Output of some ifconfig:
> ifconfig
eth0 Link encap:Ethernet HWaddr 00:1e:37:15:1b:70
           inet addr: Bcast: Mask:
           inet6 addr: fe80::21e:37ff:fe15:1b70/64 Scope:Link
           RX packets:34185 errors:0 dropped:0 overruns:0 frame:0
           TX packets:29386 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:100
           RX bytes:25645492 (25.6 MB) TX bytes:3921545 (3.9 MB)

lo Link encap:Local Loopback
           inet addr: Mask:
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING MTU:16436 Metric:1
           RX packets:5372 errors:0 dropped:0 overruns:0 frame:0
           TX packets:5372 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:661715 (661.7 KB) TX bytes:661715 (661.7 KB)

tun0 Link encap:UNSPEC HWaddr
           inet addr: P-t-P: Mask:
           RX packets:2234 errors:0 dropped:0 overruns:0 frame:0
           TX packets:3158 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:100
           RX bytes:940549 (940.5 KB) TX bytes:207091 (207.0 KB)

You need anything else?