Posts categorized “DNS”.

n-am.ro and nuam.ro domains

Just registered n-am.ro and nuam.ro domains.

Web sites are ‘parked’ for now until I choose what to put there.

E-mail web access at mail.n-am.ro.

Also, the Start Page at start.n-am.ro, Calendar at calendar.n-am.ro and Docs and Spreadsheets at docs.n-am.ro. For mail, nuam.ro is aliased to n-am.ro.

If you have ideas about web site content or want an e-mail address in these domains let me know :-) Same for mumu.ro domain.

DNS hosting kindly provided by EditDNS.

PowerDNS recursor problems

It seems that PowerDNS‘s pdns_recursor crashes on FreeBSD under load.

I’ve replaced it by a bind recursor. Excerpt from named.conf:


options {
directory "/etc/namedb";
pid-file "/var/run/named/pid";
dump-file "/var/dump/named_dump.db";
statistics-file "/var/stats/named.stats";

listen-on port XXXX { 127.0.0.1; };
};

zone "." {
type hint;
file "named.root";
};

PowerDNS recursor problems

It seems that pdns_recursor from 2.9.19 dies under light load on FreeBSD.

New DNS server up

New production DNS server is up since Saturday night.

It runs PowerDNS with a MySQL 4.1 backend on FreeBSD 5.4. Complete with web (SSL) administration and statistics.

So far:

Uptime: 18 hours Queries/second, 1, 5, 10 minute averages: 6.4, 5.12, 5.15. Max queries/second: 40.1
Cache hitrate, 1, 5, 10 minute averages: 24%, 22%, 20%
Backend query cache hitrate, 1, 5, 10 minute averages: 63%, 62%, 62%
Backend query load, 1, 5, 10 minute averages: 10, 8.2, 8.59. Max queries/second: 26.7
Total queries: 313999. Question/answer latency: 0.678ms

PowerDNS

While searching for a secure DNS server with web administration, run over PowerDNS.

Seems to work fine, no problems noted so far. (Setup: MySQL backend, own pdns_recursor).

PowerDNS has a nice web Operational Monitor:

PDNS 2.9.18 Main Page
Uptime: 6.75 hours Queries/second, 1, 5, 10 minute averages: 2.39, 2.57, 2.46. Max queries/second: 4.64
Cache hitrate, 1, 5, 10 minute averages: 5.4%, 10%, 10%
Backend query cache hitrate, 1, 5, 10 minute averages: 73%, 63%, 59%
Backend query load, 1, 5, 10 minute averages: 4.09, 5.44, 5.57. Max queries/second: 13.3
Total queries: 51968. Question/answer latency: 0.024ms

Web administration: PowerAdmin (PHP, MySQL).

After almost 20 hours uptime:

Uptime: 19.3 hours Queries/second, 1, 5, 10 minute averages: 1.38, 2.01, 1.97. Max queries/second: 5.62
Cache hitrate, 1, 5, 10 minute averages: 9.4%, 9.2%, 10%
Backend query cache hitrate, 1, 5, 10 minute averages: 53%, 55%, 55%
Backend query load, 1, 5, 10 minute averages: 3.57, 5, 4.75. Max queries/second: 13.3
Total queries: 125913. Question/answer latency: 0.022ms

Test machine setup:

  • AMD Sempron(tm) 2200+
  • 512MB RAM
  • custom-compiled 2.4.31 linux kernel on slackware 10.1-based distribution