[opendmarc-users] History file name

[Murray S. Kucherawy]

On Fri, 21 Sep 2012, Benny Pedersen wrote:
> but to my own question: is it safe to cron opendmarc-importstats pr sec 
> without dataloose ?

Your cron job would just do something like this:

mv historyfile historyfile.$$
opendmarc-import < historyfile.$$
rm historyfile.$$

opendmarc-import will then block only as long as it takes for any 
opendmarc threads to release their lock requests, so if there's any lock 
contention it will be brief, and there's no loss of data.

I think the only risk is that the OS could give the read lock to 
opendmarc-import before it gives the write lock to a thread that's 
requested it, but I'm pretty sure all such requests are seralized.

-MSK