[OMPI users] How to establish communication between two separate COM WORLD
Hello, I have read MPI-2 documents as well as FAQ. I am confused as the best way to establish communication between two MPI_COMM_WORLD which has been created by two mpiexec calls on the same node. mpiexec -conf config1 This start 20 processes on 7 nodes mpiexec -conf config2 This start 18 processes on 5 nodes I do appreciate any comments or pointer to a document or example. Thanks Ali,
Re: [OMPI users] How to establish communication between two separate COM WORLD
Thanks Ralph and Jean. Is there any chances that this feature be added to the next release of mpiexec (mpirun). Thanks again Ali, Ralph Castain Sent by: users-boun...@open-mpi.org 03/27/2006 08:44 AM Please respond to r...@lanl.gov; Please respond to Open MPI Users To Open MPI Users cc Subject Re: [OMPI users] How to establish communication between two separate COM WORLD Actually, in a not-too-distant future release, there will be an option to mpirun called "--connect" that will allow you to specify that this job is to be connected to a specified earlier job. The run-time environment will then spawn the new job and exchange all required communication information between the two jobs for you. You could therefore accomplish your desired operation by: > nohup mpirun --np xx app1 (system returns job number to you) > mpirun --np yy --connect job1 app2 (system starts app2 and connects it to job1) Should be a little more transparent. No specific coding for making the connection would be required in your application itself. Ralph Jean Latour wrote: Hello, It seems to me there is only one way to create a communication between two MPI_COMM_WORLD : use MPI_Open_Port with a specific IP + port address, and then MPI_comm_connect / MPI_comm_accept. In order to ease the port number communication, the use of MPI_publish-name / MPI_lookup_name is also possible with the constraint that the "publish" must be done before the "lookup", and this involves some synchronization between the processes anyway. Simple examples can be found in the handbook on MPI : "Using MPI-2" by William Gropp et al. Best Regards, Jean Ali Eghlima wrote: Hello, I have read MPI-2 documents as well as FAQ. I am confused as the best way to establish communication between two MPI_COMM_WORLD which has been created by two mpiexec calls on the same node. mpiexec -conf config1 This start 20 processes on 7 nodes mpiexec -conf config2 This start 18 processes on 5 nodes I do appreciate any comments or pointer to a document or example. Thanks Ali, ___ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users ___ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users ___ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users
[OMPI users] Open MPI
Hello, We are evaluating to use Open MPI in one of our project. Our initial evaluation indicate that, Open MPI is a well defined and stable product. I am looking to find a list of the government projects especially DOD or DOE related projects or Lab that are using MPI. Thanks Ali, Ali Eghlima, Ph.D. Raytheon Company Sr. Principal EngineerMissile Defense Center 339.645-6044 business 225-235 Presidential Way 339.645-6788 fax Woburn, Massachusetts ali.eghl...@raytheon.com 01801, USA *** NOTE: This e-mail, including any attached files, is confidential, may be legally privileged, and is solely for the intended recipient(s). If you received this e-mail in error, please destroy it and notify us immediately by reply e-mail or phone. Any unauthorized use, dissemination, disclosure, copying or printing is strictly prohibited. ***
[OMPI users] Release date for V1.1 or V1.0.3?
Hello, Does anyone has info on release date for Open MPI V1.1 ? Thanks Ali,
[OMPI users] OpenMPI on VxWorks?
Hello, Looking at the OpenMPI web site, I couldn't find any reference to support for VxWorks. Here are my questions: - Is there any plan for OpenMPI to run on VxWorks? - Does anyone has ported/customized OpenMPI to work on VxWorks? - What level of effort does it take to port OpenMPI to run on VxWorks. Thanks Ali,
[OMPI users] Open MPI 1.1.2 stdout problem with IBM AIX 5.3
Hello, We have Open MPI 1.1.2 installed on IBM AIX 5.3 cluster. It looks like terminal output is broken. There are a few entry in the archive for this problem, with no suggested solution or real work around. I am putting this posting with hope to get some advise for a work around or solution. #mpirun -np 1 hostname No out put, piping the command to "cat" or "more" generate no out put as well. The only way to get an output from this command is to add --debug-daemons #mpirun -np 1 --debug-daemons hostname Even this debug option is not working for a real application which generate several output. Looking forward for any comments. Thanks Ali,
Re: [OMPI users] Open MPI 1.1.2 stdout problem with IBM AIX 5.3
Hi Ralph, Thanks for the quick reply. The launch environment is rsh. I was also puzzled, when I find out --debug-daemons option makes mpirun to work for a simple case. Thanks again Ali, Ralph Castain Sent by: users-boun...@open-mpi.org 12/22/2006 10:49 AM Please respond to Open MPI Users To Open MPI Users cc Subject Re: [OMPI users] Open MPI 1.1.2 stdout problem with IBM AIX 5.3 Hi Ali I have seen this reported twice now – I think from two different sources, but I could be incorrect. Unfortunately, we don’t have access to an AIX cluster to investigate the problem. We don’t see it on any other platform at this time. Could you tell me something more about your cluster? In particular, it would help to know your launch environment (e.g., rsh/ssh, SLURM, TM, etc.). The noted behavior of using —debug-daemons to resolve the problem has me puzzled as that flag only causes the daemons to keep their stdio ports open – it has nothing to do with the application processes nor the I/O forwarding subsystem. I can suggest a couple of options in the interim, though I don’t know that they will solve the problem: 1. You could upgrade to the 1.2 beta release. The runtime underwent some significant changes that might help here; or 2. You could try configuring Open MPI with “--disable-pty-support”. The I/O forwarding system is currently based upon pty’s. We have seen a problem on one other platform where the pty support wasn’t quite what Open MPI expects – disabling it solved the problem. You should first check if the 1.1.2 release supports this configuration option (I honestly can’t remember – it has been too long) - you may need to upgrade to 1.2 to do this. I hope that provides some help. If/when we get access to an AIX cluster, we’ll try to dig deeper into this issue. Ralph On 12/22/06 7:44 AM, "Ali Eghlima" wrote: Hello, We have Open MPI 1.1.2 installed on IBM AIX 5.3 cluster. It looks like terminal output is broken. There are a few entry in the archive for this problem, with no suggested solution or real work around. I am putting this posting with hope to get some advise for a work around or solution. #mpirun -np 1 hostname No out put, piping the command to "cat" or "more" generate no out put as well. The only way to get an output from this command is to add --debug-daemons #mpirun -np 1 --debug-daemons hostname Even this debug option is not working for a real application which generate several output. Looking forward for any comments. Thanks Ali, ___ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users ___ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users
Re: [OMPI users] Open MPI 1.1.2 stdout problem with IBM AIX 5.3
Hi Ralph, I could run any test that you want me to run to diagnose the problem. Thanks again, Have a great holiday Ali Ralph Castain Sent by: users-boun...@open-mpi.org 12/22/2006 03:28 PM Please respond to Open MPI Users To Open MPI Users cc Subject Re: [OMPI users] Open MPI 1.1.2 stdout problem with IBM AIX 5.3 Thanks Ali. That is indeed helpful. I personally launch using rsh (both on OSX and Linux) frequently and have no problem with IO forwarding. So it must be something about the AIX environment that is causing the issue. Debug daemons should have nothing to do with the application process’ stdio channels. I’ll take another look at that code and see if there is some unexpected interaction that might be occurring. As I said earlier, though, there is little we can do about AIX at this time due to lack of access to that environment. If we can find someone with access and willing to help, we will explore it further. Ralph On 12/22/06 11:29 AM, "Ali Eghlima" wrote: Hi Ralph, Thanks for the quick reply. The launch environment is rsh. I was also puzzled, when I find out --debug-daemons option makes mpirun to work for a simple case. Thanks again Ali, Ralph Castain Sent by: users-boun...@open-mpi.org 12/22/2006 10:49 AM Please respond to Open MPI Users To Open MPI Users cc Subject Re: [OMPI users] Open MPI 1.1.2 stdout problem with IBM AIX 5.3 Hi Ali I have seen this reported twice now – I think from two different sources, but I could be incorrect. Unfortunately, we don’t have access to an AIX cluster to investigate the problem. We don’t see it on any other platform at this time. Could you tell me something more about your cluster? In particular, it would help to know your launch environment (e.g., rsh/ssh, SLURM, TM, etc.). The noted behavior of using —debug-daemons to resolve the problem has me puzzled as that flag only causes the daemons to keep their stdio ports open – it has nothing to do with the application processes nor the I/O forwarding subsystem. I can suggest a couple of options in the interim, though I don’t know that they will solve the problem: 1.You could upgrade to the 1.2 beta release. The runtime underwent some significant changes that might help here; or 2.You could try configuring Open MPI with “--disable-pty-support”. The I/O forwarding system is currently based upon pty’s. We have seen a problem on one other platform where the pty support wasn’t quite what Open MPI expects – disabling it solved the problem. You should first check if the 1.1.2 release supports this configuration option (I honestly can’t remember – it has been too long) - you may need to upgrade to 1.2 to do this. I hope that provides some help. If/when we get access to an AIX cluster, we’ll try to dig deeper into this issue. Ralph On 12/22/06 7:44 AM, "Ali Eghlima" wrote: Hello, We have Open MPI 1.1.2 installed on IBM AIX 5.3 cluster. It looks like terminal output is broken. There are a few entry in the archive for this problem, with no suggested solution or real work around. I am putting this posting with hope to get some advise for a work around or solution. #mpirun -np 1 hostname No out put, piping the command to "cat" or "more" generate no out put as well. The only way to get an output from this command is to add --debug-daemons #mpirun -np 1 --debug-daemons hostname Even this debug option is not working for a real application which generate several output. Looking forward for any comments. Thanks Ali, ___ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users < http://www.open-mpi.org/mailman/listinfo.cgi/users> ___ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users ___ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users ___ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users
