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March 28, 2012, 05:54 |
Multi-cpu computation HPMPI problem
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#1 |
Member
Join Date: Oct 2011
Location: Thessaloniki, Greece
Posts: 75
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Hello everybody.
I have installed recently starcd on a new computer, and I am facing with a problem when trying to ran a computation on several CPU. I am able to run Starcd on 1CPU, without problem. I can also run several single-CPU computation at the same time. However, when trying to run the computation on 2 or more CPU, I am getting the following error message: mpirun: gethostbyname(crevoise) failed mpirun: Cannot find IP for mpirun matching crevoise It seems HPMPI is trying to access different IP address for each CPU? Does somebody already faced with that problem and have some hint to solve it? Thanks /Crevoise |
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February 26, 2014, 05:32 |
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#2 |
Member
Join Date: Oct 2011
Location: Thessaloniki, Greece
Posts: 75
Rep Power: 15 |
(this is explained in the manual, but sometime one might just miss the info - p95 in the manual version 8.04)
If you are facing the same issue, then you should just add the following command: -rsh ssh into the window appearing when opening a new computation. On that window, if you select "parallel on local host", 'compute processes 2" for example, the command line at the bottom is something like path*** -server -np 2 just add -rsh ssh after -server, and it should work (assuming you had the same problem as mine) Hope this help |
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Tags |
cpu, mpi, mpirun, parallel computation |
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