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linux - Magento's cron.php: Persistent or not? Why putting it into cron?



I have a question regarding Magento.




Apparently, to perform scheduled tasks within Magento, it needs to run a script called cron.php. Originally the script was triggered by an on-server crontab using the line wget -O /dev/null http://www.example.com/cron12345.php.



Unfortunately, due to some problems, we need to limit the life of the PHP FPM child processes to 300 seconds... and that murdered the PHP process running cron.php.



I tried running cron.php from CLI using the command php -c /etc/php5/fpm/php.ini cron.php and it seemed to work... but there were no output and the script just keeps running...



So my questions:




  1. Is cron.php a one-shot script, or does it run until completion and needs to be invoked again?


  2. If it needs to be regularly invoked (via cron), can I just add a crontab like the following:




*/15 * * * * cd /var/www/website && php -c /etc/php5/fpm/php.ini cron.php



Thank you for your kind assistance.


Answer





  1. It should finish, it can take some time especially if you didn't run it in a while.
    But generally it will finish. If it doesn't you'll need to check what is going on.


  2. Yes, that is how this is generally done, see:
    http://www.magentocommerce.com/wiki/1_-_installation_and_configuration/how_to_setup_a_cron_job



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