I am running a backup server hosted outside a data center. This server is meant to work as an ancillary services provider and as a backup mail server.
I assigned it a domain, installed it as an Ubuntu Lucid LTS machine with a bind DNS server, and needed a backup server.
After some research, I decided to try Buddyns. I can tell that it completely meets my expectations. It was extremely easy to setup according to their setup page, and after a frustrated trial with a cpanel-managed site I found out there was people behind the box...Support exists and is great.
To have an idea of your dns speed you may use the simple linux script:
# calculate dns server speed
if [ $# -eq 0 ] # Must have command-line args to script.
echo "Usage ./dnspeed
for (( i=1; i<=$n; i++ ))
e=$(echo "$end - $start" | bc)
#echo DNS query took $e seconds
t=$(echo " $t+1000*$e" | bc)
t=$(echo "scale=0; $t/$n" | bc)
echo DNS query took an average of $t milliseconds
or use something like this:
let's look at our main, data-center located dns server acutron.net and acutron.eu, where we have used Buddyns. Of course this is simplistic (does not take the location into account), but gives you a raw idea:
acutron.net using its datacenter server
Average response time of DNS Server 188.8.131.52 is: 0.1655s
acutron.eu using its own server
Average response time of DNS Server 184.108.40.206 is: 0.1713s
acutron.eu using buddyns
Average response time of DNS Server 220.127.116.11 is: 0.0512s
To end up, reliability is great, no down-time has ever been detected.
I am not affiliated in any way with Buddyns. As it is a free service and it works reliably and is properly supported I just recommend it.