Hi, Antonio Thanks a lot for your reply, I just figure out that is the firewall issue. after I set the firewall. it works now. Thanks again. But I still got a few questions on MPI and multithreads mixed programming. Currently, I try to run each process on each server, and each process using thread pool to run multiple threads (pthread lib). I am not sure whether it is the correct way or not. I wrote it as: MPI_Init() .... ... /* create thread pool and initial */ ...... /* fetch job into thread pool */ ...... MPI_Finalize(); When I check the book and notes, I found people use MPI_Init_thread() with MPI_THREAD_MULTIPLE but the some docs said it supported OpenMP, is that possible to use it with pthread library? I am new guy to this hybrid programming. I am not sure which is the proper way to do it. Any suggestions are appreciate. Thank you! Sufeng On Sat, Jun 22, 2013 at 12:12 PM, <[email protected]> wrote:

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Today's Topics:

1. run hello world on multiple server (Sufeng Niu) 2. Re: run hello world on multiple server (Antonio J. Pe?a) 3. Problem reproducing an example from the MPI standard (Jiri Simsa) 4. Re: Problem reproducing an example from the MPI standard (Pavan Balaji) 5. Re: Problem reproducing an example from the MPI standard (Jiri Simsa)

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Message: 1 Date: Fri, 21 Jun 2013 10:51:50 -0500 From: Sufeng Niu <[email protected]> To: [email protected] Subject: [mpich-discuss] run hello world on multiple server Message-ID: < CAFNNHkwpqdGfZXctL0Uz3hpeL25mZZMtB93qGXjc_+tjnV4csA@mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1"

Hi,

Sorry to bother you guys on this stupid question. last time I re-install OS for all blades to keep them the same version. after I mount, set keyless ssh, the terimnal gives the error below:

[proxy:0:[email protected]] HYDU_sock_connect (./utils/sock/sock.c:174): unable to connect from "iocfccd3.aps.anl.gov" to "iocfccd1.aps.anl.gov" (No route to host) [proxy:0:[email protected]] main (./pm/pmiserv/pmip.c:189): unable to connect to server iocfccd1.aps.anl.gov at port 38242 (check for firewalls!)

I can ssh from iocfccd1 to iocfccd3 without password. Should I shut down all firewalls on each server? I cannot find out where is the problem. Thank you

-- Best Regards, Sufeng Niu ECASP lab, ECE department, Illinois Institute of Technology Tel: 312-731-7219