host config file based on vendor specific options and service level

[Simon Hobson]

roger murray wrote:

>Constraints:
>All hosts will be assigned a fixed ip address due to monitoring tools and
>current routines. (190,000+ hosts, 350+ shared networks, 1800+ subnets)
>
>Current solution is that we specify the hosts and service levels in a
>database and build the dhcpd.conf file with a script restarting the dhcpd
>every 5 minutes. Start up takes 12-15 seconds.

How often does a change actually happen, ie, if you only restarted if 
there's actually been a change, would it improve matters (much) ?

Since you are using fixed addresses, it's a trivial matter to run two 
(or more) redundant servers. If you stagger the restarts then you 
need never be without dhcp service.