Cron job settings

Question

I'm working on ubuntu. I've configured cron job in config.xml

 <crontab>
        <jobs>
            <my_cron>
                <schedule>
                    <cron_expr>*/1 * * * *</cron_expr>
                </schedule>
                <run>
                    <model>helloworld/observer::doSomething</model>
                </run>
            </my_cron>
        </jobs>
    </crontab>

and observer function is as follow

public function doSomething()
    {
        Mage::log("Ya", null, 'obs.log');

    }

After doing these settings, I don't see cron scheduled in cron_schedule table. When I run localhost/magento/cron.php file, cron is registered in cron_schedule table.

How I can configure it such that I don't have to run cron.php every time and cron schedule will be registered in cron_schedule table?

Also, I want to run it every 1 minute by using <cron_expr>*/1 * * * *</cron_expr> but in cron_schedule table it says, it's scheduled at 2015-07-15 04:57:00, which is not just a minute away.

Answer 1

If you want your cron job to run every minute then put this in the crontab:

* * * * * /bin/sh /var/www/html/magento/cron.sh

Also this is a nice reading I think could help you to set cron groups: https://magento.stackexchange.com/a/56375/5913