In our work, we frequently find that we need tools to do specific tests. Today, because of a query from one of our users, we wrote a new tool to cover such a need: TCP DNS benchmarking.
It is not very sophisticated, but it does the job. We’ve learned that PowerDNS does around 20000 TCP/IP queries/second out of the box on a few years old server, a number we did not previously know.
From the manpage:
dnstcpbench reads DNS queries from standard input and sends them out in parallel to a remote nameserver. By default TCP/IP is used, but optionally, UDP is tried first, which allows for the benchmarking of TCP/IP fallback. The input format is one query per line: qname single-space qtype. An example: www.powerdns.com ANY powerdns.com MX
You can read the manual page on GitHub.
The tool is included in our GitHub master branch.
Here are the build dependencies for Debian 7:
apt-get install autoconf automake bison flex g++ libboost-all-dev libtool make pkg-config ragel
$ git clone https://github.com/PowerDNS/pdns.git $ cd pdns $ ./bootstrap $ ./configure --with-modules="" --without-lua $ cd pdns $ make dnstcpbench
Good luck & please let us know your thoughts & suggestions!