Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |  

This web mail archive is frozen.

This page is part of a frozen web archive of this mailing list.

You can still navigate around this archive, but know that no new mails have been added to it since July of 2016.

Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.

From: Reuti (reuti_at_[hidden])
Date: 2006-06-19 15:30:55

Am 19.06.2006 um 20:02 schrieb Michael Kluskens:

> How does OpenMPI auto-detect available hosts?
> I'm running on a cluster of dual-opterons running Debian Linux.
> Just using "mpirun -np 4 hostname" somehow OpenMPI located the second
> dual-opteron in the stack of machines but no more than that,
> regardless of how many processes I asked for.
> The master node has an internal ip of and the second node
> has an ip of and a name of "node02" and "node2"

I would suggest not to use .0 at all as a host address, as it usually
refers to a subnet by convention. And having it in the same order as
the name, avoids the offset. I mean .1 = node01, .2 = node02...

I don't know, whether this is related in any way to the effect you

Cheers - Reuti

> I've been unable to find a file that contains only the name of my
> second node and not the others.
> I'm currently running OpenMPI 1.2a1r10297.
> Michael
> _______________________________________________
> users mailing list
> users_at_[hidden]