Re: Executing functions or scripts in parallel

Phil Martin wrote:

Sure, sorry about that. I have a function that tells me if the host is DOWN or UP. I want to run this function in parallel for each host I monitor. The function is the following: function servstatus($remote_ip, $remote_ip_port, $remote_ip_proto) { if ($remote_ip_proto == "tcp") {

       $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

       // Turning Off Warning Messages
       $i_error_old=error_reporting();
       error_reporting($i_error_old & ~ (E_WARNING));

       if ($connect = socket_connect($socket, "$remote_ip", "" .

$remote_ip_port . "")) {

               return true;

the following 3 statements will never be run.

               socket_set_block($socket);
               socket_close($socket);
               unset($connect);
       } else {
               return false;

the following 3 statements will never be run.

               socket_set_nonblock($socket);
               socket_close($socket);
               unset($connect);}

my guess is you know even less about sockets, especially blocking/non-blocking than I do!

} else {

why are you making the distinction between udp and tcp in this way?

       // Turning off Warning Messages
       $i_error_old=error_reporting();
       error_reporting($i_error_old & ~ (E_WARNING));

       $socket = fsockopen("udp://$remote_ip", "$remote_ip_port", &$errno,

&$errstr, 2);

       $timeout = 1;

       if (!$socket) {

if you don't get the socket why does that mean the service is up?

               return true;
       }

       socket_set_timeout ($socket, $timeout);
       $write = fwrite($socket,"\x00");
       if (!$write) {

again if you can't write why does that mean the service is up?

               return true;
       }

       $startTime = time();
       $header = fread($socket, 1);
       $endTime = time();
       $timeDiff = $endTime - $startTime;

       if ($timeDiff >= $timeout) {

why does a time measurement mean the service is up?

               fclose($socket);
               return true;
       } else {
               fclose($socket);
               return false;
       }
       }

} Thanks in advance Felipe Martins On 5/30/06, Dave Goodchild <buddhamagnet@gmail.com> wrote:

On 30/05/06, Phil Martin <darkinner.lists@gmail.com> wrote:

Hi everyone,

      I've made a very basic and small function to suit my needs in
monitoring some hosts services. I've noticed that the script is a 
little

bit slow because of the number of hosts and services to monitor. Is there a way to execute my function servstatus(); in parallel with every hosts to increase the speed ?

      Thanks in advance.

[]'s Felipe Martins

Can you show us the function? -- http://www.web-buddha.co.uk dynamic web programming from Reigate, Surrey UK (php, mysql, xhtml, css) look out for project karma, our new venture, coming soon!