Re: Individual bulk e-mails - performance question

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On Sun, 2008-08-31 at 12:12 +0200, Per Jessen wrote:
> Robert Cummings wrote:
> 
> >> That's easily taken care of.  Instead of a cron-job, you could have a
> >> script running as a daemon, checking for emails to be sent every
> >> 5mins.
> > 
> > That's the same as running a cron every 5 minutes except now you also
> > need to detect if your daemon dies :) On the plus side though, you
> > eliminate the overhead of starting up the script every 5 minutes :)
> 
> It is not the same as it will prevent multiple scripts running
> concurrently in case a batch of emails takes longer that 5 minutes. 
> Checking if the daemon dies - I guess it's a matter of taste or
> paranoia, but I don't think it's necessary when the script is
> sufficiently simple:
> 
> #!/bin/sh
> while true 
> do
>     <yourscript>
>     sleep 300
> done

I accomplish the same with cron scripts by using locks with expiry.

Cheers,
Rob.
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