How to handle bind 9 as resolver on bad wireless links

[Aggarwal Vivek-Q4997C]

Hi

Im having a network 20 K Subscribers. I want to install the DNS Server
BIND-9.4.1 for 20 K Subs.

Can I anyone help me in dimensioning the DNS Server, in terms of Hard
Disk and RAM (Memory) required. Also the guidelines on basis of which
one will dimension the DHCP Server2323190