[mpich-discuss] mpich2 1.0.8 on windows - domain required?

[Thomas Blom]

The test command suggested (mpiexec -n 2 hostname) works fine on one of the
machines.  On the other machine (both are winXP) I get the error:

Credentials for thomas rejected connecting to mb13
Aborting: Unable to connect to mb13

This is the result of just running locally, not over a network!  In answer
to the previous question, 'thomas' is not a domain user.  This is just two
winXP machines on a local network that are part of the same "workgroup" but
neither are part of any domain.

I wonder if this has to do with my having changed the machine name on mb13
... but I have since completely uninstalled and installed mpich2.  I left
the default phrase "behappy" during this installation.  I then ran
wmpiregister and entered my username and password (which I use to login to
each machine sucessfully).

I have tried to play with wmpiconfig, but it is a little difficult to
understand how to use this.  I don't find any documentation for it.

Thanks very much for any help....

-thomas blom, austin tx



On Mon, Nov 3, 2008 at 9:01 AM, Jayesh Krishna <jayesh at mcs.anl.gov> wrote:

>  Hi,
>  The machines don't have to be part of the same domain to be part of your
> MPI job (This requirement is only for setups which use the SSPI
> authentication mechanism to launch MPI jobs).
>  Can you run a non-MPI command like hostname on the local machine ?
>
>    mpiexec -n 2 hostname
>
>  Is the user "thomas" a domain user ? In that case you should register the
> username with the domainname (DOMAINNAME\USERNAME) when registering the
> username (mpiexec -register) with mpiexec.
>  Let us know if you still have problems.
>
> Regards,
> Jayesh
>
>  ------------------------------
> *From:* mpich-discuss-bounces at mcs.anl.gov [mailto:
> mpich-discuss-bounces at mcs.anl.gov] *On Behalf Of *Thomas Blom
> *Sent:* Sunday, November 02, 2008 8:45 AM
> *To:* mpich-discuss at mcs.anl.gov
> *Subject:* [mpich-discuss] mpich2 1.0.8 on windows - domain required?
>
> Hello,
>
> I have just subscribed to the list to ask a question about mpich2 on
> windows.  (I found the archives but don't see a way to search them).
>
> Is it a requirement that the windows computers participating in mpich2 be
> part of a windows domain?  I see things in the documentation that perhaps
> imply this, but not state it outright.
>
> My computers are simply on a local network, and part of a "workgroup".  The
> smpd process manager can "see" the other systems to some extent, since the
> result of
>
> smpd -status mb13    // mb13 is the hostname of my other windows pc
>
> correctly finds that smpd is running on my other host.  But executing
> mpiexec and providing hostnames in a "machinefile" e.g.
>
> mpiexec -n 4 -machinefile machines echo %COMPUTERNAME%
>
> fails with:
>
> Credentials for thomas rejected connecting to mb13
>
>
> I have taken care that the username/pass is identical on each machine, the
> user is admin, etc.  I have followed steps I've found in various documents
> about uninstalling/installing smpd and providing the identical passphrase on
> each, running mpiexec -register, etc...
>
> Any ideas?  (Or is it just that I must be running on a domain, which I
> cannot find concrete documentation about)
>
> thanks very much,
> thomas blom in austin, tx
>
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