[mpich-discuss] Strange MPICH2 behavior in Clearcase

[Pavan Balaji]

How are you launching the mpd daemons? mpdboot would need to ssh into 
the machines to launch mpd daemons as well. If ssh works fine for you, 
Hydra should work correctly as well. What's the problem you are seeing?

  -- Pavan

On 04/08/2010 03:22 PM, chong tan wrote:
> hydra is not a solution I can use.  The main issue is that login is not 
> allow in most grid env.
> 
> running mpd outside of clearcase view does not work as the executables 
> are inside views.  It looks like
> the problem could be inside mpd or mpiexec.  The likely cause is that I 
> am running from 2 different views.
> It would be nice if I can run 2 mpd, one per view, on the same machine, 
> to help isolate the problem.
> 
> tan
> 
> 
> ------------------------------------------------------------------------
> *From:* Dave Goodell <goodell at mcs.anl.gov>
> *To:* mpich-discuss at mcs.anl.gov
> *Sent:* Thu, April 8, 2010 10:29:40 AM
> *Subject:* Re: [mpich-discuss] Strange MPICH2 behavior in Clearcase
> 
> We (the MPICH2 developers) don't have any experience with clearcase.  
> Perhaps someone in the community does though.  Because of the way that 
> clearcase works, strange filesystem behavior in MPD doesn't surprise me.
> 
> I would try two things:
> 
> 1) Use hydra with the "-wdir" option instead of MPD, as we discussed in 
> a previous thread: 
> https://lists.mcs.anl.gov/mailman/htdig/mpich-discuss/2010-January/006356.html
> 
> 2) Run your mpdboot from a directory outside of your clearcase mount.  
> This might avoid some of these problems.
> 
> -Dave
> 
> On Apr 8, 2010, at 11:59 AM, chong tan wrote:
> 
>  > I am running MPICH2 1.2.1 in Clearcase and observed this crazy MPICH2 
> behavior.  basically,
>  > I have 2 code streams (or clearcase view), one is a stable one and is 
> where I am writing new code.
>  > the 2 streams are not compatible to some extend.  Say my executable 
> is called MY, so there are 2
>  > version of it.
>  >
>  > I launch MY in a common script using :
>  >
>  > mpiexec MY < options> : MY < options>  : ...
>  >
>  > I run both, alternatedly on my test cases.  the run dir is cleaned to 
> the bone between the runs.  From time
>  > to time, I run into situation where the wrong executable was picked 
> up.  the problem goes away after
>  > I restart mpd.
>  >
>  > Question:  is this a know issue of MPICH2 ? or this is a issue of 
> MPICH2 + clearcase ?
>  >
>  > thanks
>  > tan
>  >
>  >
>  >
>  >
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji