starting 21 parallel scripts with one.

Anon

Hello,

I have one script that I would like to call up 21 times (at once) as soon as the script terminates (naturally) the parent script should invoke another instance of the child script so that 21 scripts are constantly running at the same time...
The point of this is to work off a constantly growing database with a certain procedure... and because of the mass entries into the database there needs to be more than one process running to handle the load...
I tried it with a popen(), but for some reason the parent script only opens one instance of the child script... here my script (db info has been taken out):
while (mysql_result(mysql_query("SELECT count(nr) AS needy FROM Clients WHERE done = '0'"),0,"needy") != 0) {

// Check if Processes are possible
if (mysql_result(mysql_query("SELECT count(nr) AS num_proc FROM control"),0,"num_proc") < 21) {
	echo "Starting Process!";
	popen("/usr/local/bin/php post.client.php","r");
}

} // END While Client "needy"

Thanks Joseph

[deleted]

Use teh CGI version of PHP and call the new script like this:

exec("php -q script.php &");

be sure to add the ampersand, or your parent will wait for the child to die before it continue.

Also, include a way of checking how many scripts are already running before starting any new scripts. If automatically starting scripts gets out of hand it's bye-bye server in a few seconds flat. (imagine PHP starting 21 scripts that each start 21 scripts that each start 21 scripts.. that's 9261 scripts in about 10 seconds. at a few megs each.... ouch... :-)

Anon

vincent wrote:

Use teh CGI version of PHP and call the new script like this:

of course... hav' been doing that

vincent wrote:

exec("php -q script.php &");

be sure to add the ampersand, or your parent will wait for the child to die before it continue.

Did that but for some reason the parent still seems to wait for the child... until it ends...

vincent wrote:

Also, include a way of checking how many scripts are already running before starting any new scripts.

The subscripts (that get started) don't call up any further scripts :-)

Thanks for the help in advance...
Joseph