Btw, if you have a look at the dhcpd.leases file posted on a related bug (https://bugs.launchpad.net/maas/+bug/1153077/+attachment/3689992/+files/dhcpd.leases.gz), you'll see that, although the file weights 28M, there are only 48 different IP<->MAC mappings in it. i.e. a *lot* of repetitions.
Btw, if you have a look at the dhcpd.leases file posted on a related bug (https:/ /bugs.launchpad .net/maas/ +bug/1153077/ +attachment/ 3689992/ +files/ dhcpd.leases. gz), you'll see that, although the file weights 28M, there are only 48 different IP<->MAC mappings in it. i.e. a *lot* of repetitions.