[mpich-discuss] Client - server programs on Windows

[Thierry Roudier]

Actually it's one of my constraints: I cannot run the programs in the 
same command line.

Thierry

On 23/08/2011 5:52 PM, Darius Buntinas wrote:
> 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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