run an action every 30 seconds

[Mark Rogers]

On 08/02/11 11:05, Gregory Agerba wrote:
> Two options:
>
> 1) Use cron if you can accept minimum 1 minute between every launch.
> 2) Use a a script with a sleep() instruction and verify that the script is 
> always running.
> 3) Use a heartbeat solution - http://linux-ha.org/wiki/Main_Page

4) Use cron to start a script which does the test, sleeps for 30s, then does 
the test again, then dies (to be restarted by cron at the next minute)

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