[mpich-discuss] Hydra issues

Scott Atchley atchley at myri.com
Tue Aug 25 14:37:22 CDT 2009


Hi all,

I tried using Hydra to launch 16 processes (2 hosts, 8 ppn). All I see  
is:

$ /usr/bin/time -p mpiexec.hydra -binding none -f hosts -n 16 -print- 
rank-map $PWD/IMB-MPI1.mpich2-mx -npmin 16
Warning: Permanently added the RSA host key for IP address  
'10.125.1.53' to the list of known hosts.
Warning: Permanently added the RSA host key for IP address  
'10.125.1.76' to the list of known hosts.


If I use the persistent proxies _or_ if I call IMB with just pingpong  
(or any other test alone), however, it works fine.

Separately, if I kill a mpiexec.hydra running with persistent proxies,  
the proxies also die. Is this expected?

Scott


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