Masterfiles in bind

[Paul Vixie]

fold at bcpl.net (Chip Old) writes:

> > When a server is queried, does it search its files directly, or is the
> > data from the files loaded into memory at boot time?
> 
> The data from each zone file is loaded into memory any time named is
> restarted or reloaded.

in bind4 and bind8 this is absolutely true.

in bind9 it depends on which backend you're using.  the one shipped by isc
with current bind9 is a memory-resident red/black tree, but other backends
are suspected to exist including an SQL gateway and an on-disk b-tree.