Method write_fd

src/client/SyntheticClient.cc:2080–2118

}

int SyntheticClient::write_fd(int fd, int size, int wrsize)   // size is in MB, wrsize in bytes
{
  //uint64_t wrsize = 1024*256;
  char *buf = new char[wrsize+100];   // 1 MB
  memset(buf, 7, wrsize);
  uint64_t chunks = (uint64_t)size * (uint64_t)(1024*1024) / (uint64_t)wrsize;

  //dout(5) << "SyntheticClient::write_fd: writing to fd " << fd << dendl;
  if (fd < 0) {
    delete[] buf;
    return fd;
  }

  for (unsigned i=0; i<chunks; i++) {
    if (time_to_stop()) {
      dout(0) << "stopping" << dendl;
      break;
    }
    dout(2) << "writing block " << i << "/" << chunks << dendl;
    
    // fill buf with a 16 byte fingerprint
    // 64 bits : file offset
    // 64 bits : client id
    // = 128 bits (16 bytes)
    uint64_t *p = (uint64_t*)buf;
    while ((char*)p < buf + wrsize) {
      *p = (uint64_t)i*(uint64_t)wrsize + (uint64_t)((char*)p - buf);      
      p++;
      *p = client->get_nodeid().v;
      p++;
    }

    client->write(fd, buf, wrsize, i*wrsize);
  }
  client->close(fd);
  delete[] buf;

  return 0;
}


int SyntheticClient::write_batch(int nfile, int size, int wrsize)