On Tue, Jan 04, 2011 at 03:20:44PM +0100, Marc Haber wrote: > Hi, > > in my current project, I have the task of finding out which > performance to expect from a PowerDNS authoritative server running on > a big machine. > > My test box is an HP DL 360 G6 with two quad core hyperthreading CPUs > (so I have 8 real cores with Linux seeing 16 cores) and 48 GB RAM > running Debian GNU/Linux unstable with kernel 2.6.36, and powerdns > 2.9.22.x-3 statically compiled (I ported the packaging of the > pdns-static.deb from powerdns.com to x-3). > > My test setup is deliberately big and contains about ten million zones > which are served via mysql backend (MySQL servr running on the same > system, connected to via file system socket). The cache of the MySQL > server has been warmed up, and the box has enough memory to hold the > entire database in RAM (and it does so). > > The simplest test setup is running > dnsperf -s <address> -t 5 -q 5000 -l 600 -d queryfile > with a query file containing roughly 4,2 million synthetically > generated queries, a good part of them generating NXDOMAIN. > > After some days of testing, I found out that this setup is fastest > when I configure PowerDNS with 32 receiver threads and 48 distributor > threads. While the test is running, PowerDNS roughly takes four cores, > while MySQL takes eight to ten cores, with a good percentage of the > system still being idle, putting out roughly 35 kqps. > > I would expect the test to be able to saturate my CPUs and thus > suspect that there is something wrong in my setup. >
Hi Marc, Have you tried running multiple PDNS servers at once with possibly multiple MySQL backends as needed to scale? Cheers, Ken _______________________________________________ Pdns-users mailing list [email protected] http://mailman.powerdns.com/mailman/listinfo/pdns-users
