distributed computing c++
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Thread: distributed computing c++

  1. #1
    Join Date
    Nov 2008
    Posts
    6

    Red face distributed computing c++

    hello ppl

    i want help regarding distributed computing.

    the problem is :

    i have to create a client server network. multiple clients multiple servers.
    client will ask for different files and the servers will find that file and should give it back to the client.

    i have to divide a txt file into different packets and keep it on different servers.

    the help i need is :

    how to create tcp packets of txt files? so that i can keep them at different servers..


    I HAVE TO DESIGN IT IN C++ ..

    PLEASE HELP ASAP..

  2. #2
    Join Date
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  3. #3
    Join Date
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    California
    Posts
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    Re: distributed computing c++

    Which part of the project do you need help on? The use of sockets for communication over a network? (If so, use Beej's guide as mentioned by CodePlug) The implementation and architecture for distributed computing? (If so, use a pre-packaged product like BOINC, boinc.berkeley.edu/ )

    Mike
    Last edited by MikeAThon; November 18th, 2008 at 01:53 PM. Reason: to correct typo

  4. #4
    Join Date
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    Re: distributed computing c++

    thank you..i 'll check it and see what can i do..

  5. #5
    Join Date
    Nov 2008
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    Re: distributed computing c++

    I need help in Creating Packets of Txt Files.. to save them on different servers..

  6. #6
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    Re: distributed computing c++

    Post the code that you have so far, and tell us the difficulties that you are encountering with it.

    Mike

  7. #7
    Join Date
    Nov 2008
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    Re: distributed computing c++

    this is the code i have for the Client Server Chat with Multi-Threading.. this is the SERVER code.

    I have to make it change so that i can be able to DIVIDE A TXT FILE INTO PACKETS, THEN SEND THEM TO DIFFERENT SERVERS.. SO THAT WHEN A CLIENT ACCESSES THEM , THEN ALL THE PACKETS SHOULD COME TO HIM.. ITS JUST LIKE P2P FILE SHARING..BUT THE DIFFERENCT IS THAT THIS IS DISTRIBUTED COMPUTING..

    HOPE YOU UNDERSTAND.. I NEED SERIOUS HELP.. YOU CAN ALSO CHANGE THE CODE AND SEND IT TO ME..


    ONE MORE QUESTION:

    CAN I GET THE CODE OF P2P FILE SHARING.. IN C++.. {It should work so that i can understand what actually happens "}

    *****************************************************************


    #include <iostream>
    #include <conio.h>
    #include <winsock2.h>
    #include <string>
    #include <pthread.h>
    #include <stdio.h>
    #include <fstream>

    int getpeername(int sockfd, struct sockaddr *addr, int *addrlen);


    using namespace std;
    char* buf=new char[50];
    char*Buffer = new char[50];
    SOCKET comm_sock;
    void* func1(void*) {


    while(1>0)
    {

    recv(comm_sock, Buffer, 50, 0);
    cout<<"from client: "<<Buffer;
    cout<<"\n";

    }


    }
    void* func2(void*) {

    ifstream fin;

    fin.open("1.txt");


    while(1>0)
    {
    cout<<"\nServer\n : ";
    cin.getline(buf,50);
    send(comm_sock, buf, strlen(buf)+1, 0);
    cout<<"\n";


    }



    }



    void main(int argc, char *argv[])
    {
    pthread_attr_t attr;
    pthread_attr_init(&attr);

    WSADATA wsadat;
    WORD rVersion;
    rVersion = MAKEWORD(2,0);

    if(WSAStartup(rVersion, &wsadat) != NO_ERROR)
    {
    cout<<"WSA initialization failed.\n";
    WSACleanup();
    return;
    }

    //Creating the welcome socket
    SOCKET welcome_socket;
    welcome_socket = socket(AF_INET, SOCK_STREAM, 0);

    if(welcome_socket == INVALID_SOCKET)//same as this
    {
    cout<<"Socket could not be created.\n";
    WSACleanup();
    return;
    }

    string ipaddress;
    int portno;
    //cout<<"Enter your IP address: ";
    ipaddress= "127.0.0.1";
    cout<< "IP IS : "<<ipaddress<<endl;


    // cin>>ipaddress;
    //cout<<"Enter the port no.: ";//// mostly gave port number above 5000 ////
    portno=6789;
    cout<<"PORT : "<<portno<<endl;

    SOCKADDR_IN sockaddress;
    sockaddress.sin_addr.s_addr = inet_addr(ipaddress.c_str());// use at is it always
    sockaddress.sin_port = htons(portno);
    sockaddress.sin_family = AF_INET;

    if(bind(welcome_socket, (SOCKADDR*)(&sockaddress),sizeof(sockaddress)) == SOCKET_ERROR)
    {
    cout<<"Attempt to bind failed.\n";
    WSACleanup();
    return;
    }

    //listen for incoming connection requests on the welcome socket
    listen(welcome_socket, 1);


    //create a socket for communication by accepting any requests on welcome socket
    //SOCKET comm_sock;
    SOCKADDR_IN clientaddr;
    int addresslen = sizeof(clientaddr);
    // char*Buffer = new char[13];

    while(!kbhit())
    {
    comm_sock = accept(welcome_socket, (SOCKADDR*) &clientaddr, &addresslen);
    if(comm_sock != SOCKET_ERROR)
    {
    cout<<"Connection established with client at: "
    <<(int)clientaddr.sin_addr.S_un.S_un_b.s_b1<<"."
    <<(int)clientaddr.sin_addr.S_un.S_un_b.s_b2<<"."
    <<(int)clientaddr.sin_addr.S_un.S_un_b.s_b3<<"."
    <<(int)clientaddr.sin_addr.S_un.S_un_b.s_b4<<endl;


    //send and receive data;
    //threads
    pthread_t tid1,tid2;
    pthread_create(&tid1, &attr, func1, NULL);

    pthread_create(&tid2, &attr, func2, NULL);
    pthread_join(tid2, NULL);
    pthread_join(tid1, NULL);

    }

    }

    WSACleanup();
    return;
    }


    *****************************************************************

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