[mvapich-discuss] mpd hostname resolution?

[Sayantan Sur]

Hi Kenneth,

I am CC-ing this email to Mahidhar Tateneni at SDSC. Mahidhar is one
of our collaborators. He has set up MVAPICH/MVAPICH2 successfully and
he has used mpirun_rsh.

I believe Mahidhar is installing the latest MVAPICH2-1.6-rc3 on
Trestles as well. Please feel free to discuss with him about your
launching problem.

Jim, Pavan - thanks for your replies.

Thanks.

On Tue, Feb 22, 2011 at 9:37 PM, Pavan Balaji <balaji at mcs.anl.gov> wrote:
>
> On 02/22/2011 08:01 PM, Kenneth Yoshimoto wrote:
>>
>> If hydra requires passwordless ssh to the compute nodes, I am unable
>> to use it.
>
> You don't want to setup passwordless ssh? What launcher does your system
> use?
>
> Most process managers (Hydra, mpirun_rsh, and even MPD if you use mpdboot)
> require some form of automatic remote launching capability, such as ssh,
> rsh, slurm, poe, lsf.
>
>> From the docs, it seems that mpd is still an option.  Is it broken
>> and unsupported?
>
> MPD was developed by the MPICH2 group and is not supported anymore. MVAPICH
> folks *might* still be supporting it, but I don't believe so.
>
> You can tweak MPD as you are doing to get it to work without using
> passwordless ssh, but that's internal usage and not meant to be directly
> used that way by users.
>
>> Or is there a way to bring Hydra up in a batch job, without
>> ssh/rsh/slurm?
>
> There's an experimental launcher called "persist" in Hydra, which is meant
> for manual launching (like what you are currently doing). We were working on
> it to allow Hydra to work on Windows, but it's *really* experimental. You
> are welcome to poke around with it, but it's *totally* unsupported.
>
>  -- Pavan
>
> --
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji
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>
>



-- 
Sayantan Sur

Research Scientist
Department of Computer Science
http://www.cse.ohio-state.edu/~surs