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Hi Andris,<br>
<br>
Unfortunately right now the MPI standard leaves the behavior upon
failures pretty open to implementations.<br>
<br>
With the current implementation, you can pass the flag
"-disable-auto-cleanup" to mpiexec (Hydra) to prevent it from
killing the non-failing processes. But, bear in mind that you
shouldn't use those communicators that involved the failing process
anymore. So, what you say is somehow possible if you use
MPI_Comm_spawn to create the slaves and set the error handler
MPI_ERRORS_RETURN in the intracommunicator.<br>
<br>
Again, this is something not defined in the standard, and hence
there's no guarantee it'll work in all conditions and/or MPI
implementations.<br>
<br>
On the other hand, you can search and take a look at the ULFM
proposal.<br>
<br>
I hope this helps.<br>
<br>
Best,<br>
Antonio<br>
<br>
<br>
<div class="moz-cite-prefix">On 29/01/16 14:29, Andris wrote:<br>
</div>
<blockquote cite="mid:1454074188.56ab694c64aad@mail.inbox.lv" type="cite">Hello!<br>
I'm a newbie in MPI world.<br>
I have some question about program execution.<br>
I build some program (for example, exp1) using mpicc and run it to
multiple hosts.<br>
mpiexec -f my_hosts -n 8 ./exp1<br>
4 exp1 are running on host A (rank 0-3) and 4 - on host B (rank
4-7).<br>
If one of them crashes, all other are terminating too. mpiexec
print:<br>
===================================================================================<br>
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES<br>
= PID 5774 RUNNING AT slave1<br>
= EXIT CODE: 11<br>
= CLEANING UP REMAINING PROCESSES<br>
= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES<br>
===================================================================================<br>
<br>
If I understand right, I can handle in my code only MPI function
errors.<br>
In my project I need if one process is terminated, all other
processes will stay running. For example, if slave node lose
power, processes on master node stay running. Master node will
know that processes on slave node are terminated and after some
time master node will rerun these processes on slave node.<br>
Is it possible? If yes, how?<br>
<br>
Big thanks!
<br>
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<pre class="moz-signature" cols="72">--
Antonio J. Peņa, PhD
Senior Researcher
Barcelona Supercomputing Center
<a class="moz-txt-link-freetext" href="http://www.bsc.es/about-bsc/staff-directory/pena-antonio">http://www.bsc.es/about-bsc/staff-directory/pena-antonio</a></pre>
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