ack fullfill database

[Leandro]

Hi guys,
I would like to know what is the propper way to get the las ack sended 
by dhcpd and update a plain text / database register ?
Currently Im running a tail perl script on the dhcp log file and with a 
regular expression I take the ACKs.
This method is ok for a littel amount of request, but it seems that 
after the 10k requests , some ACKs are not parsed.
Is there for example a logging facility to take ONLY the ACKs ? It would 
be very nice.

Regards.
Leandro.