[mpich-discuss] Client - server programs on Windows

[Darius Buntinas]

If you want to run two different binaries in the same application you can separate them by a colon (:).  E.g., 

    mpiexec -n 4 prog1 : -n 2 prog2

This will start 4 processes with the prog1 executable and 2 processes with the prog2 executable.

Is this what you're trying to do?

-d


On Aug 23, 2011, at 10:31 AM, Thierry Roudier wrote:

> Thanks Darius for your answer. Unfortunately, by running mpiexec I didn't find a way to set a unique KVS and domain name. Then the programs run in 2 different scopes. And it seems that is the reason why they cannot communicate together.
> Regards,
> 
> Thierry
> 
> On 23/08/2011 4:50 PM, Darius Buntinas wrote:
>> A pmi server is needed to exchange connection information (ip address and port) between the processes.  Mpiexec provides this.  Sorry, there's really no way I can see to do this statically.
>> 
>> -d
>> 
>> On Aug 23, 2011, at 2:40 AM, Thierry Roudier wrote:
>> 
>>> Hi,
>>> 
>>> Did someone already try this kind of config?
>>> Thank you very much!
>>> 
>>> Best regards,
>>> 
>>> Thierry
>>> 
>>> On 17/08/2011 9:14 PM, Thierry Roudier wrote:
>>>> Hi,
>>>> 
>>>> I try to connect 2 programs together using MPICH2 v1.4 between 2 Windows 7 64-bit computers.
>>>> I tested various configurations without success. Below is the last config I tried:
>>>> 
>>>> - Windows 1: Server
>>>> From a command prompt I set the following variables, and ran the server:
>>>> set PMI_ROOT_HOST=windows_1
>>>> set PMI_KVS=mpich2
>>>> set PMI_ROOT_LOCAL=1
>>>> set PMI_ROOT_PORT=9222
>>>> set PMI_SIZE=2
>>>> set PMI_RANK=0
>>>> Here is the C code for the server:
>>>> #include<stdio.h>
>>>> #include<mpi.h>
>>>> int main(int nArgc, char ** sArgv)
>>>> {
>>>>    int nMyRank = 0;
>>>>    MPI_Comm mInterComm;
>>>>    int nRet;
>>>> 
>>>>    char sPortName[MPI_MAX_PORT_NAME];
>>>> 
>>>>    nRet = MPI_Init(&nArgc,&sArgv);
>>>>    printf("Init - nRet: %d\n", nRet);
>>>>    fflush(stdout);
>>>>    nRet = MPI_Comm_rank(MPI_COMM_WORLD,&nMyRank);
>>>>    printf("Comm_rank - nRet: %d - MyRank: %d\n", nRet, nMyRank);
>>>>    fflush(stdout);
>>>> 
>>>>    nRet = MPI_Open_port(MPI_INFO_NULL, sPortName);
>>>>    printf("Open_port - nRet: %d - Port name: -%s-\n", nRet, sPortName);
>>>>    fflush(stdout);
>>>> 
>>>>    nRet = MPI_Comm_accept(sPortName, MPI_INFO_NULL, 0, MPI_COMM_WORLD,&mInterComm);
>>>>    printf("Comm_accept - nRet: %d\n", nRet);
>>>>    fflush(stdout);
>>>> 
>>>>    MPI_Comm_disconnect(&mInterComm);
>>>>    MPI_Finalize();
>>>> 
>>>>    return 0;
>>>> }
>>>> 
>>>> 
>>>> - Windows 2: Client (on a command prompt on the second computer)
>>>> set PMI_ROOT_HOST=windows_1
>>>> set PMI_KVS=mpich2
>>>> set PMI_ROOT_LOCAL=0
>>>> set PMI_ROOT_PORT=9222
>>>> set PMI_SIZE=2
>>>> set PMI_RANK=1
>>>> Here is the C code for the client:
>>>> #include<stdio.h>
>>>> #include<mpi.h>
>>>> int main(int nArgc, char ** sArgv)
>>>> {
>>>>    int nMyRank;
>>>>    MPI_Comm mInterComm;
>>>>    int nRet;
>>>> 
>>>>    char sPortName[MPI_MAX_PORT_NAME];
>>>>    char sPortNumber[MPI_MAX_PORT_NAME];
>>>> 
>>>>    nRet = MPI_Init(&nArgc,&sArgv);
>>>>    printf("Init - nRet: %d\n", nRet);
>>>>    fflush(stdout);
>>>>    nRet = MPI_Comm_rank(MPI_COMM_WORLD,&nMyRank);
>>>>    printf("Comm_rank - nRet: %d - MyRank: %d\n", nRet, nMyRank);
>>>>    fflush(stdout);
>>>> 
>>>>    printf("Enter the port number: ");
>>>>    fflush(stdout);
>>>>    gets(sPortNumber);
>>>>    sprintf(sPortName, "tag=0 description=windows_1 port=%s ifname=192.168.1.101 ", sPortNumber);
>>>> 
>>>>    printf("Connecting to: -%s-\n", sPortName);
>>>>    fflush(stdout);
>>>>    nRet = MPI_Comm_connect(sPortName, MPI_INFO_NULL, 0, MPI_COMM_WORLD,&mInterComm);
>>>>    printf("Comm_connect - nRet: %d\n", nRet);
>>>>    fflush(stdout);
>>>> 
>>>>    MPI_Comm_disconnect(&mInterComm);
>>>>    MPI_Finalize();
>>>> 
>>>>    return 0;
>>>> }
>>>> 
>>>> I don't use mpiexec. I directly start the programs on each computer from the command prompts. And the smpd services are stopped.
>>>> Note: I also checked without fixing the variables above, and with a mpiexec command (smpd(s) running). It doesn't work. Same problem as described below.
>>>> 
>>>> The issue I encountered is the following: The server initializes, wait in the MPI_Init function until the client starts. Once the client initialized, both programs get their respective rank 0 (server) and 1 (client). The server opens the port and displays the info. I enter the port number in the client program. And both waits. The connection is never established. The server waits in MPI_Comm_accept and the client waits in MPI_Comm_connect.
>>>> 
>>>> Note: I didn't set a domain name on my machines. I only set a unique workgroup name.
>>>> 
>>>> Any help would be really appreciated.
>>>> 
>>>> Regards,
>>>> 
>>>> Thierry
>>>> 
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