Server Sizing Question

[David A. Evans]

DHCP.   I know the queries per second that any given piece of hardware 
'could' handle is a relatively random number and I've understandably found 
a lot of differing opinions on it.    What I have not been able to find is 
information on the physical size of  leases file and how much data the 
DHCP service logging is going to add to the syslog (or wherever its put) 
for a given address pool and lease time.  Does anyone have a link to that 
information or a good estimate from their experience as to what I might 
expect in the below environment?  Does going to a failover setup add a 
noticeable percentage to either of these numbers?
60,000 available address
350 scopes
25,000 clients
approximately 300,000 queries per day(average 4 queries per second)

David A. Evans
Enterprise IP/DNS Management
Global IT Distributed Infrastructure Operations Division
dnsadmin at cat.com